Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

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

UTSA study describes new minimally invasive device to treat cancer and other illnesses: Medicine diffusion capsule could locally treat multiple ailments and diseases over several weeks December 3rd, 2016

Novel Electrode Structure Provides New Promise for Lithium-Sulfur Batteries December 3rd, 2016

Research Study: MetaSOLTM Shatters Solar Panel Efficiency Forecasts with Innovative New Coating: Coating Provides 1.2 Percent Absolute Enhancement to Triple Junction Solar Cells December 2nd, 2016

Deep insights from surface reactions: Researchers use Stampede supercomputer to study new chemical sensing methods, desalination and bacterial energy production December 2nd, 2016

Govt.-Legislation/Regulation/Funding/Policy

Research Study: MetaSOLTM Shatters Solar Panel Efficiency Forecasts with Innovative New Coating: Coating Provides 1.2 Percent Absolute Enhancement to Triple Junction Solar Cells December 2nd, 2016

Deep insights from surface reactions: Researchers use Stampede supercomputer to study new chemical sensing methods, desalination and bacterial energy production December 2nd, 2016

Quantum obstacle course changes material from superconductor to insulator December 1st, 2016

Throwing new light on printed organic solar cells December 1st, 2016

Chip Technology

Quantum obstacle course changes material from superconductor to insulator December 1st, 2016

Bumpy surfaces, graphene beat the heat in devices: Rice University theory shows way to enhance heat sinks in future microelectronics November 29th, 2016

Scientists shrink electron gun to matchbox size: Terahertz technology has the potential to enable new applications November 25th, 2016

Uncovering the secrets of friction on graphene: Sliding on flexible graphene surfaces has been uncharted territory until now November 23rd, 2016

Self Assembly

Computers made of genetic material? HZDR researchers conduct electricity using DNA-based nanowires November 9th, 2016

First multicellular organism inspires the design of better cancer drugs September 15th, 2016

A versatile method to pattern functionalized nanowires: A team of researchers from Hokkaido University has developed a versatile method to pattern the structure of 'nanowires,' providing a new tool for the development of novel nanodevices September 9th, 2016

Location matters in the self-assembly of nanoclusters: Iowa State University scientists have developed a new formulation to explain an aspect of the self-assembly of nanoclusters on surfaces that has broad applications for nanotechnology September 8th, 2016

Discoveries

UTSA study describes new minimally invasive device to treat cancer and other illnesses: Medicine diffusion capsule could locally treat multiple ailments and diseases over several weeks December 3rd, 2016

Novel Electrode Structure Provides New Promise for Lithium-Sulfur Batteries December 3rd, 2016

Research Study: MetaSOLTM Shatters Solar Panel Efficiency Forecasts with Innovative New Coating: Coating Provides 1.2 Percent Absolute Enhancement to Triple Junction Solar Cells December 2nd, 2016

Deep insights from surface reactions: Researchers use Stampede supercomputer to study new chemical sensing methods, desalination and bacterial energy production December 2nd, 2016

Announcements

UTSA study describes new minimally invasive device to treat cancer and other illnesses: Medicine diffusion capsule could locally treat multiple ailments and diseases over several weeks December 3rd, 2016

Novel Electrode Structure Provides New Promise for Lithium-Sulfur Batteries December 3rd, 2016

Research Study: MetaSOLTM Shatters Solar Panel Efficiency Forecasts with Innovative New Coating: Coating Provides 1.2 Percent Absolute Enhancement to Triple Junction Solar Cells December 2nd, 2016

Deep insights from surface reactions: Researchers use Stampede supercomputer to study new chemical sensing methods, desalination and bacterial energy production December 2nd, 2016

Military

Quantum obstacle course changes material from superconductor to insulator December 1st, 2016

Physics, photosynthesis and solar cells: Researchers combine quantum physics and photosynthesis to make discovery that could lead to highly efficient, green solar cells November 30th, 2016

New method for analyzing crystal structure: Exotic materials called photonic crystals reveal their internal characteristics with new method November 30th, 2016

Inside tiny tubes, water turns solid when it should be boiling: MIT researchers discover astonishing behavior of water confined in carbon nanotubes November 30th, 2016

Energy

Research Study: MetaSOLTM Shatters Solar Panel Efficiency Forecasts with Innovative New Coating: Coating Provides 1.2 Percent Absolute Enhancement to Triple Junction Solar Cells December 2nd, 2016

Deep insights from surface reactions: Researchers use Stampede supercomputer to study new chemical sensing methods, desalination and bacterial energy production December 2nd, 2016

Throwing new light on printed organic solar cells December 1st, 2016

Physics, photosynthesis and solar cells: Researchers combine quantum physics and photosynthesis to make discovery that could lead to highly efficient, green solar cells November 30th, 2016

Quantum Dots/Rods

Trickling electrons: Close to absolute zero, the particles exhibit their quantum nature November 10th, 2016

Notre Dame researchers find transition point in semiconductor nanomaterials September 6th, 2016

Quantum dots with impermeable shell: A powerful tool for nanoengineering August 12th, 2016

Diamond-based light sources will lay a foundation for quantum communications of the future: Electrified quantum diamond can become the heart of quantum networks and computers of the future August 7th, 2016

Solar/Photovoltaic

Research Study: MetaSOLTM Shatters Solar Panel Efficiency Forecasts with Innovative New Coating: Coating Provides 1.2 Percent Absolute Enhancement to Triple Junction Solar Cells December 2nd, 2016

Throwing new light on printed organic solar cells December 1st, 2016

Physics, photosynthesis and solar cells: Researchers combine quantum physics and photosynthesis to make discovery that could lead to highly efficient, green solar cells November 30th, 2016

'Back to the Future' inspires solar nanotech-powered clothing November 15th, 2016

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