Nanotechnology Now







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

SEFCU, SUNY Poly CNSE Announce Winning Student-Led Teams in the 6th Annual $500,000 New York Business Plan Competition April 25th, 2015

Northwestern scientists develop first liquid nanolaser: Technology could lead to new way of doing 'lab on a chip' medical diagnostics April 25th, 2015

Nanotech-enabled moisturizer speeds healing of diabetic skin wounds: Spherical nucleic acids silence gene that interferes with wound healing April 24th, 2015

Fast and accurate 3-D imaging technique to track optically trapped particles April 24th, 2015

Academic/Education

SEFCU, SUNY Poly CNSE Announce Winning Student-Led Teams in the 6th Annual $500,000 New York Business Plan Competition April 25th, 2015

Iranian Female Professor Awarded UNESCO Medal in Nanoscience April 20th, 2015

JPK reports on the use of the NanoWizard® 3 AFM system at the Hebrew University of Jerusalem April 14th, 2015

UK National Graphene Institute Selects Bruker as Official Partner: World-Leading Graphene Research Facility Purchases Multiple Bruker AFMs April 7th, 2015

Nanotubes/Buckyballs/Fullerenes

SouthWest NanoTechnologies CEO Dave Arthur to Speak at NanoBCA DC Roundtable on May 19 in Washington DC April 20th, 2015

How to maximize the superconducting critical temperature in a molecular superconductor: International team led by Tohoku University opens new route for discovering high Tc superconductors April 19th, 2015

Nanotubes with two walls have singular qualities: Rice University lab calculates unique electronic qualities of double-walled carbon nanotubes April 16th, 2015

MIT sensor detects spoiled meat: Tiny device could be incorporated into 'smart packaging' to improve food safety April 15th, 2015

Announcements

SEFCU, SUNY Poly CNSE Announce Winning Student-Led Teams in the 6th Annual $500,000 New York Business Plan Competition April 25th, 2015

Northwestern scientists develop first liquid nanolaser: Technology could lead to new way of doing 'lab on a chip' medical diagnostics April 25th, 2015

Nanotech-enabled moisturizer speeds healing of diabetic skin wounds: Spherical nucleic acids silence gene that interferes with wound healing April 24th, 2015

Fast and accurate 3-D imaging technique to track optically trapped particles April 24th, 2015

Quantum Dots/Rods

QD Vision Expands Product Line with Two-Millimeter Color LCD Display Optic: Color IQ™ Optic Enables Full-Color Gamut for Ultra-Thin Displays and All-in-One Computers April 16th, 2015

Promising future of quantum dots explored in conference: ‘20 Years of Quantum Dots at Los Alamos’ runs April 12-16 April 13th, 2015

Next important step toward quantum computer: Scientists at the University of Bonn have succeeded in linking 2 different quantum systems March 30th, 2015

Tiny bio-robot is a germ suited-up with graphene quantum dots March 24th, 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