Nanotechnology Now – Press Release: USTC found a pathway to high-quality ZnSe quantum wires


Home > Press > USTC found a pathway to high-quality ZnSe quantum wires

(a) The solution-solid-solid growth mechanism. (b) Two-step catalyzed growth for independent radial and axial size control of ZnSe QWs.

CREDIT
©Science China Press
(a) The solution-solid-solid growth mechanism. (b) Two-step catalyzed growth for independent radial and axial size control of ZnSe QWs.

CREDIT
©Science China Press

Abstract:
One-dimensional semiconductor nanowires with strong quantum confinement effect, i.e. quantum wires (QWs), are of great interest for applications in advanced optoelectronics and photochemical conversions. Beyond the state-of-the-art Cd-containing ones, ZnSe QWs, as a representative heavy-metal-free semiconductor, have shown the utmost potential for next-generation environmental-friendly applications.

USTC found a pathway to high-quality ZnSe quantum wires


Beijing, China | Posted on April 8th, 2022

Unfortunately, ZnSe nanowires produced yet are largely limited to the strong quantum confinement regime with near-violet-light absorption or to the bulk regime with undiscernible exciton features. Simultaneous, on-demand, and high-precision manipulations on their radial and axial sizes – that allows strong quantum confinement in the blue-light region – has so far been challenging, which substantially impedes their further applications.

In a new article published in the National Science Review, a research team led by professor YU Shuhong at University of Science and Technology of China (USTC) has reported the on-demand synthesis of high-quality, blue-light-active ZnSe QWs by developing a flexible synthetic approach – a two-step catalytic growth strategy that enables independent, high-precision, and wide-range controls over the diameter and length of ZnSe QWs. In this way, they bridge the gap between prior magic-sized ZnSe QWs and bulk-like ZnSe nanowires.

The researchers found that a new epitaxial orientation between the cubic-phase catalyst tips and wurtzite ZnSe QWs kinetically favors the formation of ultrathin, stacking-fault free QWs. The strong quantum confinement, high-degree size control, and the absence of mixed phases together lead to their well-defined, ultranarrow excitonic absorption in the blue-light region with full width at half maximum (FWHM) of sub-13 nm. After surface thiol passivation, they further eliminated the surface electron traps in these ZnSe QWs, resulting in long-lived charge carriers and high-efficiency solar-to-H2 conversion.

The two-step catalyzed growth strategy is believed to be general for a variety of colloidal nanowires. The access to those high-quality nanowires would thus offer a versatile material library for heavy-metal free applications in solar fuels and optoelectronics in the future.

####

For more information, please click here

Contacts:
Bei Yan
Science China Press

Office: 86-10-64015905
Expert Contact

Shu-Hong Yu
University of Science and Technology of China

Copyright © Science China 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

See the article:

News and information


‘Frustrated’ nanomagnets order themselves through disorder: Interactions between alternating layers of exotic, 2D material create ‘entropy-driven order’ in a structured system of magnets at equilibrium April 8th, 2022


Nanomedicine for brain cancer April 8th, 2022


Development of low-power and high-efficiency artificial sensory neurons: 3T-OTS device to simulate the efficient information processing method of the human brain. A green light for the development of sensor-AI combined next-generation artificial intelligence “to be used in life a April 8th, 2022


Interdisciplinary team studies challenges and prospects of lithium-CO2 dioxide batteries April 8th, 2022

Possible Futures


‘Frustrated’ nanomagnets order themselves through disorder: Interactions between alternating layers of exotic, 2D material create ‘entropy-driven order’ in a structured system of magnets at equilibrium April 8th, 2022


Nanomedicine for brain cancer April 8th, 2022


Development of low-power and high-efficiency artificial sensory neurons: 3T-OTS device to simulate the efficient information processing method of the human brain. A green light for the development of sensor-AI combined next-generation artificial intelligence “to be used in life a April 8th, 2022


Faster, more efficient nanodevice to filter proton and alkaline metal ions: Monash University researchers have developed a faster, more efficient nanodevice to filter proton and alkaline metal ions which will help design next-generation membranes for clean energy technology, conv April 8th, 2022

Chip Technology


First integrated laser on lithium niobate chip: Research paves the way for high-powered telecommunication systems April 8th, 2022


How a physicist aims to reduce the noise in quantum computing: NAU assistant professor Ryan Behunin received an NSF CAREER grant to study how to reduce the noise produced in the process of quantum computing, which will make it better and more practical April 1st, 2022


NYU physicist to lead project that aims to enhance quantum computing: Research backed by $7.5 million multidisciplinary university research initiative award April 1st, 2022


Graphene gets enhanced by flashing: Rice process customizes one-, two- or three-element doping for applications March 31st, 2022

Optical computing/Photonic computing


First integrated laser on lithium niobate chip: Research paves the way for high-powered telecommunication systems April 8th, 2022


Graphene gets enhanced by flashing: Rice process customizes one-, two- or three-element doping for applications March 31st, 2022


Peering into precise ultrafast dynamics in matter March 25th, 2022


Artificial neurons go quantum with photonic circuits: Quantum memristor as missing link between artificial intelligence and quantum computing March 25th, 2022

Discoveries


Faster, more efficient nanodevice to filter proton and alkaline metal ions: Monash University researchers have developed a faster, more efficient nanodevice to filter proton and alkaline metal ions which will help design next-generation membranes for clean energy technology, conv April 8th, 2022


Three dimensional Mn-doped NixSy/Ni2P and Mn-doped Ni2O3/Ni2P nanosheets as efficient electrocatalysts for alkaline overall water splitting April 8th, 2022


Interdisciplinary team studies challenges and prospects of lithium-CO2 dioxide batteries April 8th, 2022


Researchers redefine how liquid and solid layers stick together based on molecular forces: New study reveals how intermolecular forces inform the design of smart materials April 8th, 2022

Announcements


Three dimensional Mn-doped NixSy/Ni2P and Mn-doped Ni2O3/Ni2P nanosheets as efficient electrocatalysts for alkaline overall water splitting April 8th, 2022


First integrated laser on lithium niobate chip: Research paves the way for high-powered telecommunication systems April 8th, 2022


Interdisciplinary team studies challenges and prospects of lithium-CO2 dioxide batteries April 8th, 2022


Researchers redefine how liquid and solid layers stick together based on molecular forces: New study reveals how intermolecular forces inform the design of smart materials April 8th, 2022

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


Three dimensional Mn-doped NixSy/Ni2P and Mn-doped Ni2O3/Ni2P nanosheets as efficient electrocatalysts for alkaline overall water splitting April 8th, 2022


First integrated laser on lithium niobate chip: Research paves the way for high-powered telecommunication systems April 8th, 2022


Interdisciplinary team studies challenges and prospects of lithium-CO2 dioxide batteries April 8th, 2022


Researchers redefine how liquid and solid layers stick together based on molecular forces: New study reveals how intermolecular forces inform the design of smart materials April 8th, 2022

Energy


Faster, more efficient nanodevice to filter proton and alkaline metal ions: Monash University researchers have developed a faster, more efficient nanodevice to filter proton and alkaline metal ions which will help design next-generation membranes for clean energy technology, conv April 8th, 2022


Three dimensional Mn-doped NixSy/Ni2P and Mn-doped Ni2O3/Ni2P nanosheets as efficient electrocatalysts for alkaline overall water splitting April 8th, 2022


Scavenger nanoparticles could make fuel cell-powered vehicles a reality April 1st, 2022


“Workhorse” of photovoltaics combined with perovskite in tandem for the first time February 25th, 2022

Photonics/Optics/Lasers


First integrated laser on lithium niobate chip: Research paves the way for high-powered telecommunication systems April 8th, 2022


Graphene gets enhanced by flashing: Rice process customizes one-, two- or three-element doping for applications March 31st, 2022


Peering into precise ultrafast dynamics in matter March 25th, 2022


Artificial neurons go quantum with photonic circuits: Quantum memristor as missing link between artificial intelligence and quantum computing March 25th, 2022

Solar/Photovoltaic


Graphene crystals grow better under copper cover April 1st, 2022


Peering into precise ultrafast dynamics in matter March 25th, 2022


“Workhorse” of photovoltaics combined with perovskite in tandem for the first time February 25th, 2022


Scientists enhance energy storage capacity of graphene supercapacitors via solar heating January 28th, 2022

Leave a Reply

Your email address will not be published. Required fields are marked *