The world might run out of a crucial ingredient of touch screens. But don’t worry, we’ve invented an alternative

Timothy Muza/Unsplash, CC BY-SA

Behnam Akhavan, University of SydneyHave you ever imagined your smart phone or tablet without a touch screen? This could soon be the case if we run out of indium, one of the rarest minerals on Earth.

Indium is used in many high-tech devices such as touch screens, smart phones, solar panels and smart windows, in the form of indium tin oxide. This compound is optically transparent and electrically conductive — the two crucial features required for touch screens to work.

But there’s a problem: we have no guaranteed long-term supply of indium. It is naturally found only in tiny traces, and is therefore impractical to mine directly. Almost all of the world’s indium comes as a byproduct of zinc mining.

Fortunately, we have a potential solution: my colleagues and I have developed a new way to make optically transparent and electrically conductive coatings without indium.

A worsening problem

Because the world’s indium supply is tied to zinc mining, its availability and price will depend on the demand for zinc.

Possible declines in zinc demand — already evident in the car manufacturing industry — along with the ever-increasing usage of smart phones and touch panels — are set to exacerbate the potential shortage of indium in the future.

One option is to try and recycle indium. But recovering it from used devices is expensive because of the tiny amounts involved.

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Read more:
Touch screens: why a new transparent conducting material is sorely needed

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When a crucial material is in short supply, we should look for alternatives. And that’s exactly what my colleagues and I have found.

How does it work?

Our new coating, details of which are published in the journal Solar Energy Materials and Solar Cells, involves plasma technology.

Plasma is like a soup of charged particles in which electrons have been ripped away from their atoms, and is often described as the fourth state of matter, after solid, liquid and gas. It might sound like an exotic substance, but in fact it comprises more than 99% of the visible objects in the universe. Our Sun, like most stars, is essentially a giant ball of glowing plasma.

Closer to home, fluorescent lightbulbs and neon signs also contain plasma. Our new touchscreen films don’t contain plasma, but their manufacture uses plasma as a way to create new materials that would otherwise be impossible to make.

The new material is created using a process called plasma sputtering.
Behnam Akhavan

Our coating is made of an ultra-thin layer of silver, sandwiched between two layers of tungsten oxide. This structure is less than 100 nanometres thick — roughly one-thousandth of the width of a human hair.

These ultra-thin sandwich layers are created and coated onto glass using a process called “plasma sputtering”. This involves subjecting a mixture of argon and oxygen gases to a strong electric field, until this mixture transforms into the plasma state. The plasma is used to bombard a tungsten solid target, detaching atoms from it and depositing them as a super-thin layer onto the glass surface.

We then repeat this process using silver, and then a final third time tungsten oxide embedded with silver nanoparticles. The entire process takes only a few minutes, produces minimal waste, is cheaper than using indium, and can be used for any glass surface such as a phone screen or window.

The finished result is a sandwich of tungsten oxide and silver, coated onto glass.
Behnam Akhavan, Author provided

The finished plasma coating also has another intriguing feature: it is electrochromic, meaning it can become more or less opaque, or change colour, if an electrical voltage is applied.

This means it could be used to create super-thin “printable displays” that can become dimmer or brighter, or change colour as desired. They would be flexible and use little power, meaning they could be used for a range of purposes including smart labels or smart windows.

The material’s opacity can be changed by varying the voltage.
Behnam Akhavan, Author provided

Smart windows coated with our new films could be used to block the flow of light and thus heat as required. Our plasma film can be applied to any glass surface, which can then be set to adjust its transparency depending on the weather outside. Unlike existing “photochromic” spectacle lenses, which respond to ambient light levels, our material responds to electrical signals, meaning it can be manipulated at will.

Our new indium-free technology holds great potential to manufacture the next-generation touch-screen devices such as smart phones or electronic papers, as well as smart windows and solar cells for environmental sustainability. This technology is ready to be scaled up for creating coatings on commercial glass, and we are now doing further research and development to adapt them for future wearable electronic devices.

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Read more:
From cobalt to tungsten: how electric cars and smartphones are sparking a new kind of gold rush

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Behnam Akhavan, Senior Lecturer, ARC DECRA Fellow, School of Biomedical Engineering and School of Physics, Sydney Nano Institute, University of Sydney

This article is republished from The Conversation under a Creative Commons license. Read the original article.

The Internet

Police raid offices of assisted suicide organization in Melbourne

Police raided the Melbourne offices of the assisted-suicide advocacy organization Exit International last Thursday, seizing documents related to the alleged assisted suicide of Exit International member Frank Ward. In response to this and to the raid of another Exit International member’s home, Exit International has told its 4,000 members to be wary not to attract police activity, reports James Tillman, LifeSiteNews.com.

"We haven’t had any incidents like this for a long time," said Dr. Philip Nitschke, head of Exit International.

The raid highlights the dubious legal status of Exit International’s activities. Because assisting or even encouraging suicide is illegal in Australia, Exit International bills its workshops, books, suicide equipment, and all its activities as merely providing people with knowledge and equipment to allow them to do what they want, not as actually assisting them in the act of suicide. According to Nitschke, such was the extent of Exit International’s contact with Ward.

"[Police] were suggesting we were involved in his death but we were not," Nitschke told Television New Zealand. "We would never be actively involved in something like that, helping him end his life, which would be committing a crime."

According to Alex Schadenberg, executive director of the Euthanasia Prevention Coalition, such protestations of innocence are dubious.

"I think that this raid is long-overdue," he told LifeSiteNews.com (LSN). "Nitschke has been skirting the law for many years."

Frank Ward killed himself last June by inhaling helium, which causes asphyxia. This method of suicide is among those promoted by Dr. Nitschke. Schadenberg described to LSN how at a Right-to-Die Conference he saw Nitschke demonstrate "how a device that he claimed to have invented would regulate the flow of gas to ensure that … the act would result in their death."

"Nitschke was not concerned that he was aiding suicide by knowingly selling a device to ensure the success of a suicide."

A widespread dissemination of information on how to kill oneself, however, is precisely what Nitschke desires. In an interview

with National Review he said that someone needs to provide the knowledge of how to kill oneself "to anyone who wants it, including the depressed, the elderly bereaved, [and] the troubled teen."

"If we are to remain consistent and we believe that the individual has the right to dispose of their life, we should not erect artificial barriers in the way of sub-groups who don’t meet our criteria," he said.

The second raid on Thursday was directly related to this desire of Nitschke. Police came to the home of an elderly Exit International member in Sydney to search for the euthanasia drug Nembutal and information concerning its acquisition. They left with a small quantity of the drug and the "Peaceful Pill Handbook," a book by Nitschke and a co-author on how to kill oneself that was banned by the Australian government.

Nembutal is used by veterinarians to euthanize animals, and is tightly controlled in most places around the world. Nitschke’s organization, however, has striven to make it available to as many people as possible.

"Last year Nitschke was encouraging people to order Nembutal by mail order from a source that he had discovered," Schadenberg said. "Once again, he wasn’t concerned that people with chronic depression would access this information to kill themselves." Members of Exit International also travel to Mexico to buy the drug, where it is easily obtained.

Nitschke explained that because of the raids Exit Internatonal had sent an alert to its 4,000 members “warning them about the fact that … people should be very careful if they’ve gone to great lengths to get these drugs so that they don’t find themselves subject of any form of police activity”

Schadenberg, however, thinks it high time that such activity began in earnest.

"It is simply about time that his offices were investigated, especially now that he has set up an office in Bellingham, Washington state, where he intends to launch his group into the United States,” he said.

“He intends to grow his group Exit International and he is doing this through his recent series of speaking engagements throughout the United States, Britain and Canada."

Report from the Christian Telegraph 

Mexican High Court Frees Nine Men Accused in Acteal Massacre

Joy mixes with disappointment as 28 of 57 convicted in Chiapas remain in prison.

MEXICO CITY, November 6 (CDN) — More than 35 mainly evangelical Christian prisoners unjustly accused in the December 1997 massacre in Acteal, Chiapas had hoped they would be released from jail this week, but after long deliberations the Supreme Court of Mexico on Wednesday (Nov. 4) ruled only nine should be freed and ordered new trials for 16 others.

The high court thus ended its involvement in the controversy over the ordeal of the peasant laborers, ordering the release of the nine men – without declaring them innocent – and retrials for 16 others, this time without “invented” evidence and testimony. Those 16 men, plus several others including six who had previously been granted retrials, remain in prison.

In a 4-1 vote, the court ruled the federal attorney general violated legal process, fabricated evidence and false testimonies, formulated non-existent crimes and provided no concrete argument establishing culpability of the nine men.

Supreme Court Justice José Ramón Cossío Diaz said the decision to free the men was not a declaration of innocence but recognition of “a lack of impugning evidence” against them in the Dec. 22, 1997 massacre, in which 45 people were killed, including women and children.

“These Indians were condemned and declared guilty as a result of a trial that was plagued with violations,” Cossío Diaz said, according to El Universal. “No material proving their guilt exists.”

When prisoners convicted in the Acteal slayings learned that only nine were being released, they reportedly wept – some for joy, but most from disappointment.

“Everything was invented – I did not kill anyone,” one of the evangelical Christians released, 45-year old Manuel Luna Perez, told Proceso magazine. “Many of our companions [in jail] also know nothing about who planned the massacre.”

The court ruled that federal authorities had used “invented proofs and witnesses” in convicting the men, many of them evangelical Christians supportive of the then-ruling party who had land disputes and other conflicts with their accusers – mainly Roman Catholics sympathetic to the rebel Zapatista National Liberation Army.

At least five of the nine men released were known to be evangelical Christians when they were rounded up 12 years ago: Pablo Perez Perez, Emilio Gomez Luna, Juan Gomez Perez, Hilario Guzman Luna, and Manuel Luna Perez. Also released were Mariano Diaz Chicario, Pedro Lopez Lopez, Juan Hernandez Perez and Ignacio Gomez Gutierrez.

The nine were released from El Amate federal prison in Cintalapa, Chiapas yesterday and transported to Tuxtla where they are temporarily housed.

“There must have been about 200 to 250 people who made the trip [to the prison] – many were spouses and family members anxious to see the men,” said a Compass source in Chiapas. “As per the previous occasion, the people waited patiently outside the prison for the men to be released, only to be disappointed because they were not allowed to speak with them when they left the prison. The men were put in a mini-bus and taken to where they will be housed under government supervision for the next couple of weeks.”

The relatives and others traveled on to the men’s temporary quarters in Tuxtla, where they were able to meet with them, and several of the ex-prisoners’ spouses and other family members are staying with them there, the source said.

The freed men said the government has offered them what it promised 20 prisoners released on Aug. 13, the source said: farmland, help with building houses, water, electricity and other basic amenities, as well as helping them monetarily until they become self-supporting. 

Disappointment

An attorney representing 31 defendants in the case, Jose Antonio Caballero, reportedly expressed disappointment that the high court didn’t free more of those accused. But the attorney told EFE news service that the ruling would help remedy some of the mistakes in the legal process.

In the case of the 16 men to be given new trials, the high court ruled there was sufficient evidence for prosecution to retry them in a lower court in Chiapas. This time, the Supreme Court ruled, the lower court will not take into consideration any of the fabricated evidence or false testimonies, and the charges of use of military weapons and carrying a gun without a license are dropped.

On Aug. 12 the high court ordered the release of the first 20 prisoners (freed the next day), for the same reasons the nine men were released yesterday. All the freed men, mostly evangelical believers who insisted on their innocence, had been sentenced to 25 years and had already served nearly 12.

The most recent group was to have been freed on Oct. 28, but the Chiapas government led by Gov. Juan Sabines requested extra time to present “new proofs which demonstrate the probable responsibility of previous state and federal public officials, as well as civilians” in the massacre, according to La Jornada. Over the years, lawyers have insisted that the men were tried without access to interpreters or legal defenders acquainted with their indigenous culture and customs, as required by Mexican law.

For the past several weeks, families of the condemned men had set up a form of tent protest in the central plaza of Mexico City, attempting to call attention to the plight of their husbands, fathers, brothers and cousins.

With this week’s decision and the decision on Aug. 12, the court has ordered the release of 29 of the total 57 prisoners and retrials for 22 others accused in the Acteal massacre. Those 22 plus six others remain in prison.

Controversy over who killed the 45 people has revolved around whether there was a “massacre” by numerous “paramilitary” villagers or a “confrontation” between a handful of neighboring peasants and Zapatista National Liberation Army rebels. Historian Héctor Aguilar Camín has argued that there was both a confrontation and a massacre, with some overlap between each, but that they were largely separate incidents.

Five confessed killers have testified that they and four others engaged only Zapatista militia to avenge the death of a relative, while the federal attorney general’s office charged that at least 50 pro-government “paramilitaries” descended on a relief camp hermitage full of displaced peasants bent on killing and robbing them. The testimonies of the five confessed killers – four others remain at large – agree that the nine avengers were the only ones involved in the firefights, and that the decision to attack the Zapatistas was a private family decision made with no involvement from government authorities.

They also agree that the sole motive was to avenge the assassination of a relative – the latest of 18 unprosecuted murders by Zapatistas over the previous three months, according to Aguilar Camín.

Government prosecutors unduly dismissed much of the testimony of the five confessed avengers, Aguilar Camín wrote in a 2007 article for Nexos, noting that the killers testified that state security forces were nearby and did nothing. He highlighted the judicial irregularities of the round-up and conviction of the peasants – apprehensions without evidence or warrant, charging 83 people with homicide when only 45 people were killed and lack of translators and attorneys for the suspects, Tzotzil Mayans who did not know Spanish.

Report from Compass Direct News 

PAKISTAN: TORTURED CHRISTIAN LANGUISHING ON FALSE CHARGES

Police maneuver to keep incapacitated son of preacher in jail – and out of hospital.

LAHORE, Pakistan, June 23 (Compass Direct News) – A 37-year-old Christian is languishing in a Sialkot jail after police broke his backbone because his father was preaching Christ, according to a local advocacy group.

Arshad Masih had been in a hospital – chained to his bed on false robbery charges – after police torture that began Dec. 28, 2008 left him incapacitated. He was discharged from General Hospital in Lahore on Saturday (June 20) and returned to jail despite efforts by the Community Development Initiative (CDI), a support group that is providing Masih legal assistance.

CDI Research Officer Napoleon Qayyum said that hospital personnel treated Masih callously, but that conditions there were better than in the jail in Sialkot. At least in the hospital, Qayyum said, Masih’s gray-haired father was able to carry him on his shoulders when he needed to go to the bathroom.

Hospital staff members released Masih even though they knew he would not receive the medical care he needs in jail and could face further abuse, the CDI researcher said.

“We told the hospital administration and doctors that Masih would be released from jail within a few days, so he should not be discharged from the hospital as he would not be taken care of in jail, but they paid no heed to our request,” Qayyum said.

He said Sialkot police gave assurances that Masih would be released from jail if he arrived there from the hospital by 10 p.m. A police van left early Saturday morning from Sialkot to bring Masih from the hospital in Lahore to Sialkot jail, but it did not reach the hospital until 6 p.m. even though it is only 100 kilometers (62 miles) from Sialkot to Lahore.

Qayyum said officers also invented delays on the return trip.

“Despite our requests to the police van staff, they reached the jail at 10:30 p.m.,” Qayyum said. “The Sialkot police used the delays to demoralize us by creating problems so that we do not file a petition for torturing.”

The CDI official said the group’s first priority is to “take him out of Sialkot so that police may not further create problems for him.”

Murder Threat

Hajipura police detained Masih on Dec. 28 on orders from the Sadar police station in Gujranwala, where Masih’s father, Iqbal Masih, had been preaching Christ.

The elder Masih, an itinerant preacher who has traveled to remote areas to proclaim Christ for three decades, told Compass that objections to his ministry led to false accusations of robbery against his son. Area Muslims resented his preaching and his visits to a Christian family in Gujranwala, he said, and told him to stop visiting the family.

“They told me that I was preaching a false religion and should stop doing it, and that I should succumb to their pressure,” the elder Masih told Compass.

Area Muslims had complained to Gujranwala police of the elder Masih’s efforts, and officers there first sought to arrest him in a case filed against “unidentified people,” he said. Later, he said, Gujranwala police told Hajipura police to charge his son in some robbery cases, as Arshad Masih lived in the Hajipura precincts.

When police arrested Arshad Masih on Dec. 28, they tortured him for several days, the younger Masih said.

“They hung me upside down all night, beat me and used all inhumane torture methods, leaving me permanently paralyzed,” he said.

Police falsely named him in a robbery case, according to CDI. All others named in the case were released after paying bribes, advocacy group officials said. Police officers also asked Masih’s father for a bribe of 50,000 rupees [US$620], the elder Masih said.

“They asked me as well for 50,000 rupees, but I refused to pay on the grounds that it was illegal and additionally I hadn’t that much money,” Iqbal Masih said.

The complainant in the robbery case eventually testified that Arshad Masih hadn’t been among the robbers, and he was granted bail. Before court orders reached the jail, however, Sialkot police informed Sadar police officers in Gujranwala, who arrived at the jail and had Masih remanded to them for a robbery case filed against “unidentified people.”

“Because of that, Masih could not be freed for one moment,” CDI’s Qayyum said.

Gujranwala police also threatened to kill Masih in a staged police encounter if he told the court that he had been tortured, according to CDI. They also warned him that he should not act as if he were in any pain in court.

The court, however, found him unable to stand and sent him to Allama Iqbal Memorial Hospital in Sialkot for medical examination. Gujaranwala police therefore had to leave him. But police did not tell Masih or CDI staff which police station was keeping Masih in its custody at the hospital.

With the help of the American Center for Law and Justice, CDI filed a case in the Gujranwala Sessions court for Masih’s bail and also provided some assistance for his medical treatment.

On June 16, the Sadar police station investigating officer told the court that police under his command were not detaining Masih, but that the Sialkot police were. Because the Gujranwala police were not detaining him, he argued, bail orders issued on March 23 for Masih’s release pertained to Sialkot and therefore Masih’s police custody in the hospital was illegal.

“The police have been keeping us in the dark so that we could never pursue the case in the right direction,” said CDI’s Qayyum. “How can a brutally tortured patient even heal their wounds in such mental agony when his hand is always tied in chains, and two policemen are maintaining a 24-hour watch over him?”

The researcher said he maintained hope that the judicial system would provide Masih relief from his agony, which has taken its toll on his family as well. Masih has three children that he has pulled from school due to lack of money.

His wife is illiterate and cannot make a living, CDI officials said, adding that Masih’s four married sisters are the main sources of his financial support.

Report from Compass Direct News

CHINA: ACTION URGED FOR MISSING RIGHTS ACTIVIST

State-sponsored thugs threatened to kill Gao Zhisheng if he revealed torture.

LOS ANGELES, March 25 (Compass Direct News) – Certain that Chinese authorities are torturing Christian human rights activist Gao Zhisheng following the escape of his family to the United States, advocacy group China Aid Association (CAA) today urged the international community to take action on his behalf.

Earlier this year Gao had authorized CAA to release his account of 50 days of torture by state-sponsored thugs in September and October of 2007. Gao had written the account in November 2007 while under house arrest in Beijing after prolonged beatings and electric shocks on his mouth and genitals.

“Every time when I was tortured,” Gao wrote, “I was always repeatedly threatened that if I spelled out later what had happened to me, I would be tortured again, but I was told, ‘This time it will happen in front of your wife and children.’”

On Jan. 9, less than a month before state security agents in his home village in Shaanxi province abducted him on Feb. 4, Gao’s family members began their escape from China. They arrived on foot to Thailand and eventually were whisked to the United States. They arrived in Los Angeles on March 11 and transferred to New York on March 14.

Gao’s wife, Geng He, along with 16-year-old daughter Geng Ge and 5-year-old son Gao Tianyu, fear for his safety. In his 2007 account, Gao had written that those who captured and tortured him warned that if he revealed their ill treatment of him, he would be killed.

Gao wrote that Chinese officials among his captors – some of whom he recognized – referred to a report he had written on the torture of members of the Falun Gong spiritual group and warned him that he was about to suffer the same way. They urinated on him and repeatedly prodded his body, mouth and genitals with electric shock batons.

He described a tall, strong man who pulled his hair and said repeatedly, “Your death is sure if you share this with the outside world.”

 

Escape from China

Gao’s wife reportedly said that fleeing China was “extraordinarily difficult,” and that friends risked their lives to help them defect.

Geng reportedly said that Gao, under constant police surveillance, was unable to accompany them. According to Agence France-Presse (AFP), Geng told Radio Free Asia that the family traveled by train before crossing into Thailand on foot – walking day and night.

Her daughter and son had been under virtual house arrest, according to the AFP report. The adolescent Geng Ge had been unable to attend school, and with her increasing desperation came several suicide attempts, Gao’s wife reportedly told Radio Free Asia. The family is seeking asylum in the United States.

Aiding in their escape was were several groups, according to The Epoch Times, including Friends of Gao Zhisheng, the Global Association for the Rescue of Gao Zhisheng and the U.N. Refugee Agency.

Gao, who has been nominated for a Nobel Peace Prize, has also defended house church Christians and coal miners as well as members of the banned Falun Gong, which fuses Buddhist-inspired teachings with forms of meditation. In 1999 Beijing banned it as an “evil cult.”

Gao’s suffering in the fall of 2007 followed an open letter he wrote to the U.S. Congress describing China’s torture of Falun Gong members and other human rights abuses.

“The persecution of Falun Gong is the worst disaster to human nature in this era,” he wrote. “It does not mean, however, that the rights of other religious groups in China are not violated. The CCP [Chinese Communist Party]’s continuous suppression of Christian family churches is comparable to the shocking persecution of Falun Gong.”

Persecution in towns and villages toward house church members is “no different from the disaster suffered by Falun Gong practitioners,” he wrote. “In my hometown, a small county, the number of arrested, detained, and robbed family church members each year is far beyond persecuted Falun Gong practitioners, and this illegal persecution has been going on for a long time.”

Harassment of house church Christians increased significantly last year, according to CAA. A total of 2,027 Christians were affected in incidents reported to CAA in 2008, compared with 788 people in 2007. Of the 2008 total, 764 Christians were arrested and detained, most for brief periods, and 35 were sentenced to prison terms or re-education through labor.

In Beijing, the total number of people persecuted was 539, up 418 percent from the 104 reported in 2007, CAA said.

In his November 2007 account, released last Feb. 9, Gao said that officials asked him to write articles cursing Falun Gong and praising the government. When he refused, they pressured him to write a statement saying that Falun Gong practitioners had given him false evidence of torture, and that – despite constant harassment – the government had treated him and his family well. Gao said he signed this statement, as well as others in which he confessed to sexual impropriety, after beatings that left him unrecognizable.

Eventually, he wrote in the November 2007 account, under torture he agreed to his captors’ demand that he admit to illicit affairs, and he invented stories about four different women.

Gao, who at one time had been honored by China’s justice ministry as one of the top 10 lawyers for his service to the poor, resigned his membership in the CCP in 2005 to protest repression of the Falun Gong.

CAA and Gao’s family are urging concerned people worldwide to sign a petition to the Chinese government advocating his release at www.FreeGao.com .

Report from Compass Direct News