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

Bosch announces high-performance MEMS acceleration sensors for wearables June 27th, 2017

Nanometrics to Participate in the 9th Annual CEO Investor Summit 2017: Accredited investor and publishing research analyst event held concurrently with SEMICON West and Intersolar 2017 in San Francisco June 27th, 2017

NMRC, University of Nottingham chooses the Quorum Q150 coater for its reliable and reproducible film thickness when coating samples with iridium June 27th, 2017

Picosun’s ALD solutions enable novel high-speed memories June 27th, 2017

Govt.-Legislation/Regulation/Funding/Policy

Atomic imperfections move quantum communication network closer to reality June 25th, 2017

Research accelerates quest for quicker, longer-lasting electronics: UC Riverside-led research makes topological insulators magnetic well above room temperatures June 25th, 2017

U.S. Air Force Research Lab Taps IBM to Build Brain-Inspired AI Supercomputing System: Equal to 64 million neurons, new neurosynaptic supercomputing system will power complex AI tasks at unprecedented speed and energy efficiency June 23rd, 2017

Rice U. chemists create 3-D printed graphene foam June 22nd, 2017

Chip Technology

Nanometrics to Participate in the 9th Annual CEO Investor Summit 2017: Accredited investor and publishing research analyst event held concurrently with SEMICON West and Intersolar 2017 in San Francisco June 27th, 2017

New TriboLab CMP Provides Cost-Effective Characterization of Chemical Mechanical Wafer Polishing Processes: Bruker Updates Industry-Standard CP-4 Platform for Most Flexible and Reliable Testing June 27th, 2017

Atomic imperfections move quantum communication network closer to reality June 25th, 2017

Research accelerates quest for quicker, longer-lasting electronics: UC Riverside-led research makes topological insulators magnetic well above room temperatures June 25th, 2017

Self Assembly

Oddball enzyme provides easy path to synthetic biomaterials May 17th, 2017

Nanotubes that build themselves April 14th, 2017

Nanocages for gold particles: what is happening inside? March 16th, 2017

Most Complex Nanoparticle Crystal Ever Made by Design: Possible applications include controlling light, capturing pollutants, delivering therapeutics March 2nd, 2017

Discoveries

Physicists make quantum leap in understanding life's nanoscale machinery June 27th, 2017

Picosun’s ALD solutions enable novel high-speed memories June 27th, 2017

Atomic imperfections move quantum communication network closer to reality June 25th, 2017

Research accelerates quest for quicker, longer-lasting electronics: UC Riverside-led research makes topological insulators magnetic well above room temperatures June 25th, 2017

Announcements

Bosch announces high-performance MEMS acceleration sensors for wearables June 27th, 2017

Nanometrics to Participate in the 9th Annual CEO Investor Summit 2017: Accredited investor and publishing research analyst event held concurrently with SEMICON West and Intersolar 2017 in San Francisco June 27th, 2017

NMRC, University of Nottingham chooses the Quorum Q150 coater for its reliable and reproducible film thickness when coating samples with iridium June 27th, 2017

Picosun’s ALD solutions enable novel high-speed memories June 27th, 2017

Military

Atomic imperfections move quantum communication network closer to reality June 25th, 2017

Research accelerates quest for quicker, longer-lasting electronics: UC Riverside-led research makes topological insulators magnetic well above room temperatures June 25th, 2017

U.S. Air Force Research Lab Taps IBM to Build Brain-Inspired AI Supercomputing System: Equal to 64 million neurons, new neurosynaptic supercomputing system will power complex AI tasks at unprecedented speed and energy efficiency June 23rd, 2017

Rice U. chemists create 3-D printed graphene foam June 22nd, 2017

Energy

Tiny bubbles provide tremendous propulsion in new microparticles research-Ben-Gurion U. June 21st, 2017

Enhanced photocatalytic activity by Cu2O nanoparticles integrated H2Ti3O7 nanotubes June 21st, 2017

Cambridge Nanotherm partners with Inabata for global sales and distribution June 20th, 2017

Development of low-dimensional nanomaterials could revolutionize future technologies June 15th, 2017

Quantum Dots/Rods

Graphene and quantum dots put in motion a CMOS-integrated camera that can see the invisible May 29th, 2017

The brighter side of twisted polymers: Conjugated polymers designed with a twist produce tiny, brightly fluorescent particles with broad applications May 16th, 2017

Nanoparticles open new window for biological imaging: “Quantum dots” that emit infrared light enable highly detailed images of internal body structures April 10th, 2017

Particle Works creates range of high performance quantum dots February 23rd, 2017

Solar/Photovoltaic

Tiny bubbles provide tremendous propulsion in new microparticles research-Ben-Gurion U. June 21st, 2017

Enhanced photocatalytic activity by Cu2O nanoparticles integrated H2Ti3O7 nanotubes June 21st, 2017

Development of low-dimensional nanomaterials could revolutionize future technologies June 15th, 2017

In a project funded by the Austrian Science Fund FWF, the physicist Serdar Sarıçiftçi investigates possible uses in electronics of the semiconductor properties of indigo pigment June 14th, 2017

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