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Researchers Create Scalable Building Blocks for Ultrathin Nanoscale Electronics

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Researchers at the Department of Energy’s Oak Ridge National Laboratory (ORNL) have created arrays of semiconductor junctions – the building blocks of electronics – in arbitrary patterns within a single, nanometer-thick semiconductor crystal.

The research is published in Nature Communications with the title “Patterned Arrays of Lateral Heterojunctions within Monolayer Two-Dimensional Semiconductors.” The paper is freely available online.

“The formation of semiconductor heterojunctions and their high-density integration are foundations of modern electronics and optoelectronics,” state the researchers. “This demonstration of lateral heterojunction arrays within a monolayer crystal is an essential step for the integration of two-dimensional semiconductor building blocks with different electronic and optoelectronic properties for high-density, ultrathin devices.”

Next-generation ultrathin devices for applications ranging from flexible consumer electronics to solar energy

Ultrathin junctionsToday’s technology permits building very small – 10-nanometer – transistors from three-dimensional (3D) crystals . But the ORNL scientists, in a research step that could open the way to future development in electronics, have used two-dimensional (2D) crystals to build ultrathin transistors by lithographically patterning junctions between two different semiconductors within a single nanometer-thick layer.

In the process, the researched transformed selected regions of a single-layer crystal (molybdenum diselenide) into another crystal (molybdenum disulfide) by pulsed laser deposition of sulfur atoms that replaced the original selenium atoms, thus creating a viable junction between different semiconductors. The image shows how the sulfur atoms (green) replaced the selenium atoms (red) in lithographically exposed regions (top) as shown by Raman spectroscopic mapping (bottom).

“We chose pulsed laser deposition of sulfur because of the digital control it gives you over the flux of the material that comes to the surface,” said study co-leader Masoud Mahjouri-Samani. “You can basically make any kind of intermediate alloy. You can just replace, say, 20 percent of the selenium with sulfur, or 30 percent, or 50 percent.”

“The development of a scalable, easily implemented process to lithographically pattern and easily form lateral semiconducting heterojunctions within two-dimensional crystals fulfills a critical need for ‘building blocks’ to enable next-generation ultrathin devices for applications ranging from flexible consumer electronics to solar energy,” said study co-leader David Geohegan, head of ORNL’s Nanomaterials Synthesis and Functional Assembly Group at the Center for Nanophase Materials Sciences. Mahjouri-Samani added that millions of 2D building blocks with numerous patterns may be made concurrently.

We can literally make any kind of pattern that we want.

The researchers plan to study if their pulsed laser vaporization and conversion method will work with atoms other than sulfur and selenium.

Images from Oak Ridge National Laboratory and Wikimedia Commons.

Important: Never invest (trade with) money you can't afford to comfortably lose. Always do your own research and due diligence before placing a trade. Read our Terms & Conditions here. Trade recommendations and analysis are written by our analysts which might have different opinions. Read my 6 Golden Steps to Financial Freedom here. Best regards, Jonas Borchgrevink.

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Crypto Market Development: South Korea’s National Policy Committee Chair Calls For ICO Legalization

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  • A member of South Korea’s governing Democratic party and the chairman of Korea’s National Policy Committee, Min Byung-Doo, is urging to ease the current regulations on Initial Coin Offerings (ICOs).
  • Min Byung-Doo wants to introduce necessary regulatory framework, allowing ICOs in the country.

Allow ICOs In South Korea

The South Korean National Policy Committee Chief, Min Byung-Doo, is calling for a regulatory framework to be explored. This would be to allow for Initial Coin Offerings (ICOs) to take place within the country. He stated that the current prohibiting of ICOs weakens the industry’s competitiveness appeal with foreign markets. Further boldly adding, this would be preventing growth.

In his statement at to lawmakers, Byung-Doo said, “We can see that the flow of investment is clearly changing compared to ICO and angel fundraising. The ICO has raised $1.7 billion for Telegram and $4 billion for Block.One, it is getting bigger and bigger.”

Further in the statement, Min Byung-Doo said, “Let the government, the National Assembly and the blockchain association quickly create a working group to block fraud, speculation, money laundering and develop the block-chain industry,”. However, he acknowledged the government’s reluctance to create the needed framework.

In September 2017, the Financial Services Commission in South Korea announced a ban on ICOs. The law has not yet been enacted.

Crypto Market Reaction

A lack of reaction has been observed for now, despite this determination to help further legitimize the digital currency market in South Korea. Crypto market developments in the country are always watched very carefully. This is given their large crypto market participation. It was reported in December 2017 that South Korea accounted for as much as 17% of all Ethereum trades occurring in cryptocurrency markets.

Market Reactions To South Korean Related News

Ripple (XRP) crashed in January, following CoinMarketCap’s decision to remove XRP price data from Korean exchange desks. This as a result largely brought down the total average.

XRP/USD Coinmarketcap update triggered drop

On 11th January, Korean crypto exchange Coinrail was hacked, and over $40 million in tokens were stolen. Bitcoin initially dropped over 11% on this.

BTC/USD Coinrail hack triggered drop

One final example, UPbit, a South Korean exchange, was investigated by authorities for illicitly moving customer funds to the account of its executives. Bitcoin initially dropped over 7% on the news.

BTC/USD UPbit investigation triggered drop

Given the above mentioned, one should keep an eye on any developments coming out of South Korea, for the foreseeable future.

Disclaimer: The author owns bitcoin, Ethereum and other cryptocurrencies. He holds investment positions in the coins, but does not engage in short-term or day-trading.

Featured image courtesy of Shutterstock.

Important: Never invest (trade with) money you can't afford to comfortably lose. Always do your own research and due diligence before placing a trade. Read our Terms & Conditions here. Trade recommendations and analysis are written by our analysts which might have different opinions. Read my 6 Golden Steps to Financial Freedom here. Best regards, Jonas Borchgrevink.

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4.5 stars on average, based on 32 rated postsKen has over 8 years exposure to the financial markets. During a large part of his career, he worked as an analyst, covering a variety of asset classes; forex, fixed income, commodities, equities and cryptocurrencies. Ken has gone on to become a regular contributor across several large news and analysis outlets.




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Crypto Market Update: Japan’s Self-Regulatory Group (JVCEA) Readying Tighter Rules on Digital Assets

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  • A group of cryptocurrency exchange operators in Japan is readying to tighten up measures following recent cyber breach.
  • Action follows reported hack earlier in the month; cryptocurrency exchange Zaif lost an estimated $59.67 million.

Self-Regulatory Group Set To Tighten Rules

The Japan Virtual Currency Exchange Association (JVCEA) is exploring new rules to safeguard against cyber theft, including setting a cap on the amount of digital currencies managed online. This is citing informed sources, being reported by local news outlet, the Japan Times.

Informed sources detailed that the cap will likely to be around 10 – 20% of customer deposits. The JVCEA are said to be soon revising its rules, which were originally drawn up in June following multiple cyber attacks. These will be implemented once all has been approved by the Financial Services Agency. This is as part of the payment services law process in the country.

The move likely received large motive due to the reported hack earlier in September. The Japanese start-up Tech Bureau said that its cryptocurrency exchange, known as Zaif, had been hacked. Losses were estimated around $59.67 million of Bitcoin and two other digital currencies -Bitcoin Cash and Monacoin.

Market Reaction

No initial reaction was observed across the cryptocurrency market on this latest update, coming out of Japan as of Sunday 30th September. Despite this, however, Japan and crypto sell-off are not uncommon to have been used in the same sentence over the past years and even months. This means volatility could be in store for digital assets in the short term.

Back in January of this year, the largest reported hack on a Japanese exchange took place with Coincheck losing $530 million worth of NEM in a coordinated attack. This incident massively spooked the market, and was  a heavy contributor to the large sell-off in January. As we’ve observed over the past eight months, the market has yet to reclaim January’s peak (although this can’t be solely attributed to the theft). At the time, South Korea’s Attorney General had already spooked investors with FUD related to the possible banning of digital currencies in the country.

Against this backdrop, investors are advised to pay attention to Japan-related volatility.

BTC/USD weekly chart

Most recently, looking in the month of June, another sell-off was seen. This one came after Japan’s financial regulator ordered several cryptocurrency exchanges to improve their practices against money laundering. The action led bitFlyer — the country’s largest crypto exchange — to suspend new account creation. This was initiated to improve internal processes in order to curb money laundering and terrorist financing.

Disclaimer: The author owns bitcoin, Ethereum and other cryptocurrencies. He holds investment positions in the coins, but does not engage in short-term or day-trading.

Featured image courtesy of Shutterstock.

Important: Never invest (trade with) money you can't afford to comfortably lose. Always do your own research and due diligence before placing a trade. Read our Terms & Conditions here. Trade recommendations and analysis are written by our analysts which might have different opinions. Read my 6 Golden Steps to Financial Freedom here. Best regards, Jonas Borchgrevink.

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4.5 stars on average, based on 32 rated postsKen has over 8 years exposure to the financial markets. During a large part of his career, he worked as an analyst, covering a variety of asset classes; forex, fixed income, commodities, equities and cryptocurrencies. Ken has gone on to become a regular contributor across several large news and analysis outlets.




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Hacking Matter

The 2016 Nobel Prize in Chemistry Vindicates Radical Visions of Molecular Nanotechnology

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The Nobel Prize in Chemistry 2016 was awarded jointly to Jean-Pierre Sauvage, Sir J. Fraser Stoddart and Bernard L. Feringa “for the design and synthesis of molecular machines.” The award vindicates the dreams of nanotechnology enthusiasts, and points the way to the molecular nanotechnology proposed by Drexler in the eighties.

(more…)

Important: Never invest (trade with) money you can't afford to comfortably lose. Always do your own research and due diligence before placing a trade. Read our Terms & Conditions here. Trade recommendations and analysis are written by our analysts which might have different opinions. Read my 6 Golden Steps to Financial Freedom here. Best regards, Jonas Borchgrevink.

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Giulio Prisco is a freelance writer specialized in science, technology, business and future studies.




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