Nanotechnology Now

Our NanoNews Digest Sponsors
Heifer International



Home > Press > Controlled synthesis of crystal flakes paves path for advanced future electronics

Researchers obtained high-quality 2D InAs single crystals via van der Waals epitaxy and explored the optical and electrical properties of InAs single crystals.
CREDIT
Nano Research, Tsinghua University Press
Researchers obtained high-quality 2D InAs single crystals via van der Waals epitaxy and explored the optical and electrical properties of InAs single crystals. CREDIT Nano Research, Tsinghua University Press

Abstract:
The third dimension may be responsible for preventing electronics from becoming thinner, tinier and more flexible, according to an international collaboration that developed a way to manufacture new, idealized two-dimensional semiconductor materials.

Controlled synthesis of crystal flakes paves path for advanced future electronics

Tsinghua, China | Posted on June 17th, 2022

The researchers, led by Lin Zhou, associate professor of chemistry at Shanghai Jiao Tong University in China, focused on indium arsenide (InAs), a narrow bandgap semiconductor with properties useful for high-speed electronics and highly sensitive infrared photodetectors. Unlike most of the existing 2D materials with layered strucutures, the problem, Zhou said, is that InAs typically has a 3D lattice structure, which makes it challenging to transform into ultrathin 2D films for advanced electronic and optoelectronic applications.



“The growth of large, ultrathin 2D non-layered materials has been a grand challenge, but one worth solving.Thanks to its high mobility and tunable bandgap, 2D InAs could be a critical material for next-generation, high-performance nano-electronics, nano-photonics and quantum devices,” Zhou said. “It has the advantages of both InAs, such as high carrier mobility, small and direct bandgap size, and 2D materials, which have an ultrathin nature suitable for small size devices, are flexible and transparent.” This work also provides a promising way to further expand the group of 2D semiconductors by incorporating materials with non-layered structures.



The researchers took advantage of a weak atomic attraction known as the van der Waals force in epitaxy growth. The force describes how neutral molecules can connect with one another, while epitaxy involves applying an overlay of one material to a crystal-like substrate. Using atomically flat mica, which is naturally layered, as a substrate, the researchers grew a thin layer of InAs. The molecules in the mica substrate and the molecules in the InAs are mutually attracted enough to connect, preventing the InAs from growing into a 3D lattice. Moreover, the van der Waals growth ensures strain-free and no misfit dislocations in as-grown 2D InAs. The InAs can be incredibly thin with desired properties.



Zhou also noted that the InAs and the substrate do not covalently bond, so they can be separated and the substrate re-used, making the synthesis process more cost-effective.



“We also found that we can tune the properties of 2D InAs by changing the material’s thickness due to the quantum confinement effect,” Zhou said. “The 2D InAs is easy to tailor to achieve desired properties and to integrate with other compounds. In addition to manipulating the thickness during synthesis, we can also stack 2D InAs with other 2D materials to form heterojunctions for multifunction performance, giving them significant advantages in electronics and photovoltaics.”



The final 2D InAs material takes the form of triangular flakes, roughly five nanometers thick. That’s about 0.0007 the size of a single red blood cell. The tinier the material, the smaller the devices it will eventually comprise, Zhou said.



“Prior to this work, high-quality 2D — meaning less than 10 nanometers thick — InAs had not been reported, let alone a scalable synthesis of 2D InAs single crystals with unique optical and electronic properties,” Zhou said. “Our work paves the way for miniaturization InAs-based devices and integrations.”



Next, Zhou said the team will explore new 2D semiconductor to grow with an ultimate goal of achieving scalable synthesis of high-quality 2D materials over large areas for multi-functional applications.



Other authors include Jiuxiang Dai, Zhitong Jin, Yunlei Zhou, Xianyu Hu and Tao Li, Shanghai Jiao Tong University, China; Teng Yang, Chinese Academy of Sciences; Jingyi Zou and Xu Zhang, Carnegie Mellon University, United States; Weigao Xu, Nanjing University, China; and Yuxuan Lin, University of California, United States.



The National Key Basic Research Program of China, the start-up funds of Shanghai Jiao Tong University, the National Natural Science Foundation of China, the National Key R&D Program of China, the National Natural Science Foundation of China and Beijing National Laboratory for Molecular Sciences supported this research.

####

About Tsinghua University Press
Nano Research is a peer-reviewed, international and interdisciplinary research journal, sponsored by Tsinghua University and the Chinese Chemical Society. It offers readers an attractive mix of authoritative and comprehensive reviews and original cutting-edge research papers. After more than 10 years of development, it has become one of the most influential academic journals in the nano field. Rapid review to ensure quick publication is a key feature of Nano Research. In 2020 InCites Journal Citation Reports, Nano Research has an Impact Factor of 8.897 (8.696, 5 years), the total cites reached 23150, and the number of highly cited papers reached 129, ranked among the top 2.5% of over 9000 academic journals, ranking first in China's international academic journals.



About SciOpen



SciOpen is a professional open access resource for discovery of scientific and technical content published by the Tsinghua University Press and its publishing partners, providing the scholarly publishing community with innovative technology and market-leading capabilities. SciOpen provides end-to-end services across manuscript submission, peer review, content hosting, analytics, and identity management and expert advice to ensure each journal’s development by offering a range of options across all functions as Journal Layout, Production Services, Editorial Services, Marketing and Promotions, Online Functionality, etc. By digitalizing the publishing process, SciOpen widens the reach, deepens the impact, and accelerates the exchange of ideas.

For more information, please click here

Contacts:
Yao Meng
Tsinghua University Press

Office: 86-108-347-0574

Copyright © Tsinghua University Press

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

They published their approach on June 3 in Nano Research. (DOI 10.1007/s12274-022-4543-8)

Related News Press

News and information

Stability of perovskite solar cells reaches next milestone January 27th, 2023

Qubits on strong stimulants: Researchers find ways to improve the storage time of quantum information in a spin rich material January 27th, 2023

UCF researcher receives Samsung International Global Research Outreach Award: The award from the multinational electronics corporation will fund the development of infrared night vision and thermal sensing camera technology for cell phones and consumer electronics January 27th, 2023

Temperature-sensing building material changes color to save energy January 27th, 2023

2 Dimensional Materials

Ultrathin vanadium oxychloride demonstrates strong optical anisotropic properties Two-dimensional material could make novel strain sensors, photodetectors and other nanodevices a reality January 6th, 2023

Wafer-scale 2D MoTe₂ layers enable highly-sensitive broadband integrated infrared detector January 6th, 2023

Team undertakes study of two-dimensional transition metal chalcogenides Important biomedical application, including biosensing December 9th, 2022

Experimental nanosheet material marks a step toward the next generation of low-power, high-performance electronics December 9th, 2022

Possible Futures

One of the causes of aggressive liver cancer discovered: a 'molecular staple' that helps repair broken: DNA Researchers describe a new DNA repair mechanism that hinders cancer treatment January 27th, 2023

Stability of perovskite solar cells reaches next milestone January 27th, 2023

Danish quantum physicists make nanoscopic advance of colossal significance January 27th, 2023

UC Irvine researchers decipher atomic-scale imperfections in lithium-ion batteries: Team used super high-resolution microscopy enhanced by deep machine learning January 27th, 2023

Chip Technology

Manufacturing advances bring material back in vogue January 20th, 2023

Vertical electrochemical transistor pushes wearable electronics forward: Biomedical sensing is one application of efficient, low-cost transistors January 20th, 2023

Towards highly conducting molecular materials with a partially oxidized organic neutral molecule: In an unprecedented feat, researchers from Japan develop an organic, air-stable, highly conducting neutral molecular crystal with unique electronic properties January 20th, 2023

Approaching the terahertz regime: Room temperature quantum magnets switch states trillions of times per second January 20th, 2023

Nanoelectronics

Key element for a scalable quantum computer: Physicists from Forschungszentrum Jülich and RWTH Aachen University demonstrate electron transport on a quantum chip September 23rd, 2022

Reduced power consumption in semiconductor devices September 23rd, 2022

Atomic level deposition to extend Moore’s law and beyond July 15th, 2022

The physics of a singing saw: Insights on centuries-old folk instrument is underpinned by a mathematical principle that may pave the way for high-quality resonators for sensing, electronics and more April 22nd, 2022

Discoveries

One of the causes of aggressive liver cancer discovered: a 'molecular staple' that helps repair broken: DNA Researchers describe a new DNA repair mechanism that hinders cancer treatment January 27th, 2023

Stability of perovskite solar cells reaches next milestone January 27th, 2023

Qubits on strong stimulants: Researchers find ways to improve the storage time of quantum information in a spin rich material January 27th, 2023

Temperature-sensing building material changes color to save energy January 27th, 2023

Announcements

UCF researcher receives Samsung International Global Research Outreach Award: The award from the multinational electronics corporation will fund the development of infrared night vision and thermal sensing camera technology for cell phones and consumer electronics January 27th, 2023

Temperature-sensing building material changes color to save energy January 27th, 2023

Quantum sensors see Weyl photocurrents flow: Boston College-led team develops new quantum sensor technique to image and understand the origin of photocurrent flow in Weyl semimetals January 27th, 2023

Department of Energy announces $9.1 million for research on quantum information science and nuclear physics: Projects span the development of quantum computing, algorithms, simulators, superconducting qubits, and quantum sensors for advancing nuclear physics January 27th, 2023

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers/Posters

Qubits on strong stimulants: Researchers find ways to improve the storage time of quantum information in a spin rich material January 27th, 2023

Temperature-sensing building material changes color to save energy January 27th, 2023

Quantum sensors see Weyl photocurrents flow: Boston College-led team develops new quantum sensor technique to image and understand the origin of photocurrent flow in Weyl semimetals January 27th, 2023

Danish quantum physicists make nanoscopic advance of colossal significance January 27th, 2023

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project