Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

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

Application of air-sensitive semiconductors in nanoelectronics: 2-D semiconductor gallium selenide in encapsulated nanoelectronic devices September 22nd, 2017

Researchers set time limit for ultrafast perovskite solar cells September 22nd, 2017

DNA triggers shape-shifting in hydrogels, opening a new way to make 'soft robots' September 21st, 2017

Physicists develop new recipes for design of fast single-photon gun Physicists develop high-speed single-photon sources for quantum computers of the future September 21st, 2017

Academic/Education

Two Scientists Receive Grants to Develop New Materials: Chad Mirkin and Monica Olvera de la Cruz recognized by Sherman Fairchild Foundation August 16th, 2017

Moving at the Speed of Light: University of Arizona selected for high-impact, industrial demonstration of new integrated photonic cryogenic datalink for focal plane arrays: Program is major milestone for AIM Photonics August 10th, 2017

Graduate Students from Across the Country Attend Hands-on NanoCamp: Prominent scientists Warren Oliver, Ph.D., and George Pharr, Ph.D., presented a weeklong NanoCamp for hand-picked graduate students across the United States July 26th, 2017

The Physics Department of Imperial College, London, uses the Quorum Q150T to deposit metals and ITO to make plasmonic sensors and electric contact pads July 13th, 2017

Nanotubes/Buckyballs/Fullerenes/Nanorods

How to draw electricity from the bloodstream: A one-dimensional fluidic nanogenerator with a high power-conversion efficiency September 11th, 2017

Silk could improve sensitivity, flexibility of wearable body sensors August 20th, 2017

Regulation of two-dimensional nanomaterials: New driving force for lithium-ion batteries July 26th, 2017

Killing cancer in the heat of the moment: A new method efficiently transfers genes into cells, then activates them with light. This could lead to gene therapies for cancers July 9th, 2017

Announcements

Application of air-sensitive semiconductors in nanoelectronics: 2-D semiconductor gallium selenide in encapsulated nanoelectronic devices September 22nd, 2017

Researchers set time limit for ultrafast perovskite solar cells September 22nd, 2017

DNA triggers shape-shifting in hydrogels, opening a new way to make 'soft robots' September 21st, 2017

Physicists develop new recipes for design of fast single-photon gun Physicists develop high-speed single-photon sources for quantum computers of the future September 21st, 2017

Quantum Dots/Rods

New approach on research and design for CQD catalysts in World Scientific NANO August 2nd, 2017

Coupling a nano-trumpet with a quantum dot enables precise position determination July 14th, 2017

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

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