Nanotechnology Now







Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Artificial molecules: Papers by UD researchers explore novel methods for assembly of quantum dots

UD's Matthew Doty is co-author of two papers exploring novel methods for assembling quantum dots to control how electrons interact with light and magnetic fields.
Photo by Kathy F. Atkinson
UD's Matthew Doty is co-author of two papers exploring novel methods for assembling quantum dots to control how electrons interact with light and magnetic fields.

Photo by Kathy F. Atkinson

Abstract:
Matthew Doty, assistant professor in the University of Delaware Department of Materials Science and Engineering, is co-author of two papers exploring novel methods for assembling quantum dots to control how electrons interact with light and magnetic fields for applications in next generation computing devices and solar energy capture.

Artificial molecules: Papers by UD researchers explore novel methods for assembly of quantum dots

Newark, DE | Posted on November 22nd, 2011

The papers recently appeared in Physical Review B, a journal of the American Physical Society (APS). Both papers were selected as "Editor's Suggestions," a designation reserved for only five percent of articles submitted to the journal.

Doty's group studies quantum dots, tiny semiconductors that can trap single electrons in a manner comparable to atoms like hydrogen and helium. Quantum dots are often referred to as "artificial atoms" because they have electronic properties similar to natural atoms. Doty's group explores the way these "artificial atoms" can be assembled to create "artificial molecules." Unlike natural molecules, the properties of these quantum dot molecules can be tailored to create unique and tunable properties for the electrons trapped in the molecules.

The first paper, entitled "In situ tunable g factor for a single electron confined inside an InAs quantum dot molecule," documents a new strategy for engineering the spin properties of single confined electrons.

Doty's team demonstrates this strategy by designing, fabricating and characterizing a quantum dot molecule that allows the electron properties to be tuned with a small change in the voltage applied to the molecule. The success of the strategy validates a new approach to engineering optoelectronic devices with dramatically improved computational power.

The lead author of the paper was Weiwen Liu, a doctoral student in Doty's research group. Co-authors include UD engineering doctoral students Ramsey Hazbun and Shilpa Sanwlani; James Kolodzey, Charles Black Evans Professor of Electrical and Computer Engineering; and Allan Bracker and Daniel Gammon from the Naval Research Laboratory.

The second paper, entitled "Spectroscopic signatures of many-body interactions and delocalized states in self-assembled lateral quantum dot molecules," describes a different molecular design, in which the two quantum dots are placed side by side instead of one on top of the other. The lateral geometry changes the way in which electrons are trapped in the molecule and creates more complex electronic molecular states. These new electronic states of the lateral molecular design provide a template for new computing architectures that overcome scaling limits of conventional charge-based computing by mediating interactions between single confined spins.

Xinran Zhou, a doctoral student in Doty's research group, served as the lead author of the paper. Co-authors include UD doctoral students Shilpa Sanwlani and Weiwen Liu and researchers from Kwangoon University of South Korea, the University of Arkansas and the University of Electronic Science and Technology of China.

Doty's work with quantum dot molecules is supported, in part, through funding from the National Science Foundation, which awarded him the prestigious Faculty Early Career Development Award in 2009. The highly competitive NSF Career Award is bestowed on researchers deemed most likely to become the academic leaders of the 21st century.

Doty, who joined the UD faculty in 2007, previously served as a National Research Council research associate at the Naval Research Laboratory after earning his bachelor's degree in physics from Pennsylvania State University and his doctoral degree in physics at the University of California, Santa Barbara.

Article by Gabriella Chiera

####

For more information, please click here

Contacts:
University of Delaware
Office of Communications & Marketing
302-831-NEWS

Copyright © University of Delaware

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 News Press

News and information

Anousheh Ansari Wins the National Space Society's Space Pioneer Award for "Service to the Space Community" March 5th, 2015

Enhanced Graphene Components for Next Generation Racing Yacht March 5th, 2015

Get ready for NanoDays! March 5th, 2015

American Chemical Society Presidential Symposia: nanoscience, international chemistry March 5th, 2015

Govt.-Legislation/Regulation/Funding/Policy

New research could lead to more efficient electrical energy storage March 4th, 2015

Energy-generating cloth could replace batteries in wearable devices March 4th, 2015

The taming of magnetic vortices: Unified theory for skyrmion-materials March 3rd, 2015

Black phosphorus is new 'wonder material' for improving optical communication March 3rd, 2015

Chip Technology

Experiment and theory unite at last in debate over microbial nanowires: New model and experiments settle debate over metallic-like conductivity of microbial nanowires in bacterium March 4th, 2015

Magnetic vortices in nanodisks reveal information: Researchers from Dresden and Jülich use microwaves to read out information from smallest storage devices March 4th, 2015

Cambrios and Heraeus Jointly Create New, High-Conductivity Transparent Conductors: Two Companies' Combined Products Dramatically Extend Flexible Substrate Capabilities for Next-Generation Mass-Market Technology Products March 3rd, 2015

The taming of magnetic vortices: Unified theory for skyrmion-materials March 3rd, 2015

Self Assembly

Nanotubes self-organize and wiggle: Evolution of a nonequilibrium system demonstrates MEPP February 10th, 2015

Engineering self-assembling amyloid fibers January 26th, 2015

Revealed: How bacteria drill into our cells and kill them December 2nd, 2014

Live Images from the Nano-cosmos: Researchers watch layers of football molecules grow November 5th, 2014

Discoveries

Enhanced Graphene Components for Next Generation Racing Yacht March 5th, 2015

American Chemical Society Presidential Symposia: nanoscience, international chemistry March 5th, 2015

Magnetic vortices in nanodisks reveal information: Researchers from Dresden and Jülich use microwaves to read out information from smallest storage devices March 4th, 2015

CiQUS researchers obtain high-quality perovskites over large areas by a chemical method March 4th, 2015

Announcements

Anousheh Ansari Wins the National Space Society's Space Pioneer Award for "Service to the Space Community" March 5th, 2015

Enhanced Graphene Components for Next Generation Racing Yacht March 5th, 2015

Get ready for NanoDays! March 5th, 2015

American Chemical Society Presidential Symposia: nanoscience, international chemistry March 5th, 2015

Military

Black phosphorus is new 'wonder material' for improving optical communication March 3rd, 2015

Researchers turn unzipped nanotubes into possible alternative for platinum: Aerogel catalyst shows promise for fuel cells March 2nd, 2015

Simulating superconducting materials with ultracold atoms: Rice physicists build superconductor analog, observe antiferromagnetic order February 23rd, 2015

New nanogel for drug delivery: Self-healing gel can be injected into the body and act as a long-term drug depot February 19th, 2015

Energy

CiQUS researchers obtain high-quality perovskites over large areas by a chemical method March 4th, 2015

UC research partnership explores how to best harness solar power March 2nd, 2015

Learning by eye: Silicon micro-funnels increase the efficiency of solar cells February 25th, 2015

Magnetic nanoparticles enhance performance of solar cells X-ray study points the way to higher energy yields February 25th, 2015

Quantum Dots/Rods

Optical nanoantennas set the stage for a NEMS lab-on-a-chip revolution February 24th, 2015

QD Vision Named Edison Award Finalist for Innovative Color IQ™ Quantum Dot Technology February 23rd, 2015

Ocean Optics Names Winner of 2015 Young Investigator Award: Cash prize and grant awarded during SPIE BiOS/Photonics West 2015 conference February 21st, 2015

Rediscovering spontaneous light emission: Berkeley researchers develop optical antenna for LEDs February 3rd, 2015

Solar/Photovoltaic

UC research partnership explores how to best harness solar power March 2nd, 2015

New nanowire structure absorbs light efficiently: Dual-type nanowire arrays can be used in applications such as LEDs and solar cells February 25th, 2015

Learning by eye: Silicon micro-funnels increase the efficiency of solar cells February 25th, 2015

Magnetic nanoparticles enhance performance of solar cells X-ray study points the way to higher energy yields February 25th, 2015

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




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More










ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2015 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE