Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


DHgate

Home > Press > Faculty Profile: Nina Markovic - Unraveling the Mysteries of Physics on the Nanoscale

Spin-diode with a nanotube quantum dot (QD) poised between a ferromagnetic (blue) and a non-ferromagnetic metal electrode (red and blue). Yellow walls represent contact barriers between the QD and the electrodes. Credit: Christopher Merchant/JHU
Spin-diode with a nanotube quantum dot (QD) poised between a ferromagnetic (blue) and a non-ferromagnetic metal electrode (red and blue). Yellow walls represent contact barriers between the QD and the electrodes. Credit: Christopher Merchant/JHU

Abstract:
Quantum dots (QD)—nanoscale particles that confine electrons and can emit and absorb light—have been studied in lasers, solar paneling, and biomedical therapeutics. Nina Markovic, affiliated faculty member of the Johns Hopkins Institute for NanoBioTechnology (INBT) and assistant professor of physics in the Krieger School of Arts and Sciences, believes this emerging technology will prove important in cancer therapies, energy transmission, and drug delivery.

Faculty Profile: Nina Markovic - Unraveling the Mysteries of Physics on the Nanoscale

Baltimore, MD | Posted on October 28th, 2008

"Nanocrystal quantum dots are commercially available," Markovic says, "but we are developing a novel kind of quantum dots using carbon nanotubes."

Carbon nanotubes are long and narrow molecules that look like chicken wire made of carbon atoms. Their fascinating electronic, optical and mechanical properties have been extensively studied in the last ten years. Now that their basic properties are better understood, Markovic explains, the next step is to apply them to biomedical applications such as quantum dot therapeutics or diagnostics.

Recently, Markovic began collaborations with INBT affiliated faculty members Justin Hanes, professor in the Department of Chemical and Biomolecular Engineering and Jennifer Sample from the Applied Physics Laboratory. Together they have been investigating nanotube quantum dots for therapeutic purposes. Markovic and Sample have just been awarded a seed grant from INBT to develop this program.

Specifically, Markovic's group is working on ways to get their nanotube quantum dots to be frequency-specific. This means they will be able to release their contents on demand and be more selectively controlled—an important step in the specific time-release of drugs, and drug delivery regimes.

In addition, Markovic is interested in quantum computing and applying nanotube quantum dot technology to photovoltaic devices. Her group recently studied a film composed of carbon nanotubes and studied their photovoltaic currents in an innovative type of solar cell. Whereas semiconductors are typically used, her idea is to create a structurally different solar cell that may better transmit electrons from the photons it receives from the sun through the photovoltaic effect.

"If light can be more efficiently captured and converted into an electric current, it may revolutionize solar paneling and its use as an efficient renewable energy," Markovic says. [See reference.]

Markovic first became fascinated by quantum mechanics when she took a modern physics course as an undergraduate at the University of Zagreb, Croatia. She says she was drawn to its counterintuitive nature and its elegant mathematical language. After completing a post-doctoral fellowship at Harvard University in 2003, Markovic joined the Hopkins physics faculty. In 2004, she was selected as one of the Alfred P. Sloan Fellows. She received the distinguished National Science Foundation's Faculty Early Career Development Award in 2006, which gave her $500,000 over five years. Markovic enjoys the classroom and teaches thermodynamics and statistical physics. She particularly enjoys teaching the Frontiers of Physics course for non-science majors, which covers all aspects of physics from quantum physics to astrophysics.

To learn more about the Markovic Lab, physics-astronomy.jhu.edu/people/faculty/nina.html.

Reference:

"Effects of diffusion on photocurrent generation in single-walled carbon nanotube films," C. A. Merchant and N. Markovic, Appl. Phys. Lett. 92, 243510 (2008).

Story by Jacob Koskimaki, INBT science writing intern and NanoBio IGERT fellow

####

About Institute for NanoBioTechnology
The Institute for NanoBioTechnology at Johns Hopkins University is revolutionizing health care by bringing together internationally renowned expertise in medicine, engineering, the sciences, and public health to create new knowledge and groundbreaking technologies.

INBT programs in research, education, outreach, and technology transfer are designed to foster the next wave of nanobiotechnology innovation.

For more information, please click here

Contacts:


* Institute for NanoBioTechnology
214 Maryland Hall
3400 North Charles Street
Baltimore, MD 21218

* Email:
* Phone: (410) 516-3423
* Fax: (410) 516-2355

Copyright © Institute for NanoBioTechnology

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

Reversible Writing with Light: Self-assembling nanoparticles take their cues from their surroundings September 3rd, 2015

For 2-D boron, it's all about that base: Rice University theorists show flat boron form would depend on metal substrates September 2nd, 2015

Silk bio-ink could help advance tissue engineering with 3-D printers September 2nd, 2015

Phagraphene, a 'relative' of graphene, discovered September 2nd, 2015

Academic/Education

Sustainable nanotechnology center September 1st, 2015

National Science Foundation Selects SUNY Poly CNSE for Expanded $2.1M Northeast Advanced Technological Education Center: NSF Center Locates to NanoCollege in Support of Flourishing Tech Industry in NYS September 1st, 2015

Announcing Oxford Instruments and School of Physics signing a Memorandum of Understanding August 26th, 2015

Kwansei Gakuin University in Hyogo, Japan, uses Raman microscopy to study crystallographic defects in silicon carbide wafers August 25th, 2015

Nanotubes/Buckyballs/Fullerenes

For 2-D boron, it's all about that base: Rice University theorists show flat boron form would depend on metal substrates September 2nd, 2015

$200K Awarded to Develop In Vitro Lung Test for Toxicity of Inhaled Nanomaterials: In Vitro Lung Test Designed to Protect Human Health and Replace Animal Testing September 1st, 2015

Developing Component Scale Composites Using Nanocarbons August 26th, 2015

Southampton scientists find new way to detect ortho-para conversion in water August 25th, 2015

Announcements

Reversible Writing with Light: Self-assembling nanoparticles take their cues from their surroundings September 3rd, 2015

Silk bio-ink could help advance tissue engineering with 3-D printers September 2nd, 2015

Phagraphene, a 'relative' of graphene, discovered September 2nd, 2015

A marine creature's magic trick explained: Crystal structures on the sea sapphire's back appear differently depending on the angle of reflection September 2nd, 2015

Quantum Dots/Rods

'Quantum dot' technology may help light the future August 19th, 2015

New research may enhance display & LED lighting technology: Large-area integration of quantum dots and photonic crystals produce brighter and more efficient light August 9th, 2015

Quantum networks: Back and forth are not equal distances! July 28th, 2015

Superfast fluorescence sets new speed record: Plasmonic device has speed and efficiency to serve optical computers July 27th, 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







Car Brands
Buy website traffic