Khondaker Group

University of Central Florida

   

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Our group is interested in  the electron transport properties of nanoscale materials. We  fabricate nanoscale electronic devices consisting of individual nanomaterials as well as their ensembles. We then investigate  fundamental electronic properties of  these devices at various temperatures (down to mK), source drain voltages, gate voltages, and magnetic fields. At low temperature, the properties of the nanomaterials are governed by quantum mechanics and we tune different parameters to probe novel phenomena. We then apply our understanding to develop better transistors, sensors, solar cells etc.

 

Opportunities: Graduate student position available. Please see here.  

Contact Info:

Dr. Saiful I. Khondaker, Associate Professor, Nanoscience Technology Center, University of Central Florida, 12424 Research Parkway Suite 400, Orlando, FL 32826. Tel: 407-864-5054, Fax: 407-882-2819, Email: saiful[at]ucf[dot]edu

News:

2012

2011

2010

2009

2008

2005-2007

 

 

2012

December 2012: Daeha's paper on "Efros-Shklovskii variable range hopping in reduced graphene oxide sheets of varying carbon sp2 fraction" is published in Physics Review B.

December 2012: Narae's paper on "The Effect of Carbon Nanotube/Organic Semiconductor Interfacial Area on the Performance of Organic Transistors" is published in Applied Physics Letters.

November 2012: Daeha successfully defended his Ph.D. thesis. Congratulations! Daeha published 10 peer reviewed papers during his Ph.D.

November 2012: Biddut successfully defended his Ph.D. thesis. Congratulations! Biddut published 9 peer reviewed papers during his Ph.D.

November 2012: Narae successfully defended her M.S. thesis. Congratulations!

November 2012: Udai successfully defended his M.S. thesis. Congratulations!

May 2012: Dr. Khondaker gave an invited talk on “Charge Injection Mechanism at Carbon Nanotube-Organic Semiconductor Interface” at 221st ECS Meeting - Seattle, Washington.

May 2012: Biddut's paper on “Thermionic Emission and Tunneling at Carbon Nanotube-Organic Semiconductor Interface” is published in ACS Nano.

March 2012: Surajit’s paper on “One pot synthesis of RGO/PbS nanocomposite and its near infrared photoresponse study” is published in Applied Physics A.

April 2012: Edwards successfully defended his “honors in major” undergraduate Thesis. Congratulations!

April 2012: Shashank's paper on “Huge volume expansion and structural transformation of carbon nanotube aligned arrays during electrical breakdown in vacuum” is published in Carbon.

April 2012: Biddut received best poster award in the category of Engineering, Computer Science, Optics, Physical Sciences, Mathematics, Modeling and Simulation at Graduate Research Forum 2012. Congratulations!

April 2012: Daeha received best poster award in the category of Engineering, Computer Science, Optics, Physical Sciences, Mathematics, Modeling and Simulation at Graduate Research Forum 2012. Congratulations!

March 2012: Eight group members presented their works in APS March meeting, Boston.

March 2012: Udai received Best Poster Award in Computational and Experimental Material Science category at Florida Chapter of American Vacuum Society. Congratulations!

March 2012: Biddut received 2nd best Poster Award in Material Science Category at Florida Chapter of American Vacuum Society. Congratulations!

March 2012: Fears received honorable mention in Energy-Related Materials category at Florida Chapter of American Vacuum Society. Congratulations!

March 2012: Daeha gave an invited talk on “Efros-Shklovskii Variable Range Hopping in Reduced Graphene Oxide Sheets” at the Florida chapter of the American Vacuum Society meeting.

March 2012: Mohammmad' s paper on “A general approach for high yield fabrication of CMOS-compatible all-semiconducting carbon nanotube field effect transistors” is published in Nanotechnology.

January 2012: Biddut paper on “High-performance short channel organic transistors using densely aligned carbon nanotube array electrodes” is published in Applied Physics Letters.


2011:

December 2011: Daeha' s paper on “Anchoring Ceria Nanoparticles on Reduced Graphene Oxide and Their Electronic Transport Properties” is published in Journal of Physical Chemistry C.

November 2011: Biddut presented his work at MRS Fall meeting, Boston.

November 2011: Khondaker gave an invited talk on “Advanced Lithography for Nanoscale Carbon Nanotubes and Graphene Oxide Devices” at Advanced Lithography Workshop, University of Florida.

October 2011: Kristy's paper on “High yield assembly and electron transport investigation of semiconducting-rich local-gated single-walled carbon nanotube field effect transistors” is published in Nanotechnology.

August 2011: Biddut's paper on “Semiconducting Enriched Carbon Nanotube Aligned Arrays of Tunable Density and Their Electrical Transport Properties” is published in ACS Nano.

August 2011: Mohammad passed his proposal defense, congratulations!

July 2011: Khondaker gave an invited talk on “Parallel fabrication and electron transport investigations of carbon nanotubes and graphene based devices” at the Department of Physics, Lehigh University.

June 2011: Mohammad passed his qualifier exam, congratulations!

June 2011: Shashank’s paper on “Correlated electrical breakdown in arrays of high density aligned carbon nanotubes” is published in Applied Physics Letters.

May 2011: Udai Bhanu joined our group. He is a graduate student in physics. Welcome!

April 2011: Khondaker gave an invited talk on “Parallel fabrication and electron transport investigations of carbon nanotubes and graphene based devices” at Florida A&M University.

April 2011: Kristy successfully defended her “honors in major” undergraduate thesis. She is accepted in the graduate program of University of Texas at Austin. Congratulations!

April 2011: Feras passed his proposal defense, congratulations!

April 2011: Biddut's paper on “Fabrication of Organic Field Effect Transistor by Directly Grown Poly(3 Hexylthiophene) Crystalline Nanowires on Carbon Nanotube Aligned Array Electrode” is published in ACS Applied Material and Interfaces.

March 2011: We received NSF funding for exploring carbon nanotube – organic interface.

March 2011: Five group members presented their works in APS March meeting, Dallas, Texas.

March 2011: Mohammad received Honorable mention in material characterization category at Florida Chapter of American Vacuum Society. Congratulations!

March 2011: Mohammad's paper on “Schottky diode via dielectrophoretic assembly of reduced graphene oxide sheets between dissimilar metal contacts” is published as an invited artcle in the focused issue of “chemically modified graphene” in New Journal of Physics

March 2011: Daeha's paper on “Coulomb blockade and hopping conduction in graphene quantum dots array” is published in Physical Review B.

March 2011: Shashank's paper on “Electrical transport properties of peptide nanotubes coated with gold nanoparticles via peptide-induced biomineralization” is published in Nanotechnoly.

March 2011: Biddut's paper on “Fabrication of Aligned Carbon Nanotube Array Electrodes for Organic Electronics Devices” is published in the inaugural issue of Materials Express.

March 2011: Khondaker gave an invited MRSEC Seminar on “Directed assembly and electron transport properties of chemically functionalized graphene” at Georgia Tech.

February 2011: Shashank's paper on “Ultrahigh Density Alignment of Carbon Nanotube Arrays by Dielectrophoresis” is published in ACS Nano.

January 2011: Narae Kang joined our group. She is a graduate student in physics. Welcome!

2010:

November 2010: Paul's paper on “Directed assembly of solution processed single-walled carbon nanotubes via dielectrophoresis: From aligned array to individual nanotube devices” is published in Journal of Vacuum Science and Technology B.

September 2010: Mohammad received 2nd best poster award in the Nanophotonics and Nanoelectronics category at NanoFlorida.

August 2010: Edwards Jimenez joined our group. He is an undergraduate student in Electrical Engineering. Welcome!

August 2010: Daeha's paper on “Space charge limited conduction with exponential trap distribution in reduced graphene oxide sheets” is published in Applied Physics Letters.

August 2010: Tanusri's paper on “High performance organic phototransistor based on regioregular poly(3-hexylthiophene)” is published in Nanotechnology.

July 2010: Daeha passed his proposal defense, congratulations!

July 2010: Biddut passed his proposal defense, congratulations!

June 2010: Daeha passed his qualifier exam, congratulations!

June 2010: Biddut passed his qualifier exam, congratulations!

June 2010: Arif's paper on Poly(3-hexylthiophene) crystalline nanoribbon network for organic field effect transistors is published in Applied Physics Letters.

May 2010: Arif's paper on Poly (3-hexylthiophene) crystalline nanoribbon network for organic field effect transistors is accepted for publication in Applied Physics Letters

May 2010: Farnood Rezaie joined our group. He is a graduate student in physics. Welcome Farnood!

April 2010: Paul successfully defended his Ph.D. dissertation. He is taking a job at Triquint Semiconductor. Congratulations to Dr. Stokes!

April 2010:  Paul's paper on Evaluating defects in solution processed carbon nanotube devices via low temperature transport spectroscopy is accepted for publication in ACS Nano.

April 2010: Surajit's paper on Position dependent photodetector from large area reduced graphene oxide thin films is accepted for publication in Applied Physics Letters.

April 2010: Dr. Khondaker has been promoted to Asscociate Professor with tenure.

March 2010: Eight group members presented their works in APS March meeting, Portland, Oregon.

March 2010: Daeha's paper on High yield fabrication of chemically reduced graphene oxide field effect transistors by dielectrophoresis is accepted for publications in Nanotechnology.

March 2010: Dr. Khondaker received UCF Research Incentive Award.

February 2010: Justin Brooks, the high school student in our group, received first prize in Seminole county science fair in physics/astronomy category.

January 2010: Paul's paper on High quality solution processed carbon nanotube transistors assembled by AC dielectrophoresis is accepted for publication in Applied Physics Letters

January 2010: Feras Alzubi joined our group. He is a graduate student in physics. Welcome back!

2009

November 2009: Biddut's paper on Near-infrared photoresponse in single walled carbon nanotube/polymer composite films is accepted for publication in Carbon

October 2009: Dr. Khondaker was given a  joint appointment in the School of Electrical Engineering and Computer Science,  University of Central Florida.

October 2009: Daeha's paper on Electronic transport properties of ternary Cd(1-x)Zn(x)S nanowire network is accepted for publication in Nanotechnology.

September 2009: Muhammad Rakibul Islam joined our group. He is a graduate student in physics. Welcome!

September 2009: Biddut's paper on Diffusion mediated photoconduction in multi-walled carbon nanotube film is accepted for publication in the Journal of Applied Physics

September 2009: Daeha received best poster award in NanoFlorida 2009  in Nanophotonics and Nanoelectronics category. Congratulations to Daeha!

September 2009: Biddut received 2nd best poster award in NanoFlorida 2009 in Nanophotonics and Nanoelectronics category. Congratulations to Biddut!

May 2009: Dr. Tanusri Pal joined our group as a post-doctoral fellow. Welcome!

May 2009: Dr. Surajit Ghosh joined our group as a post-doctoral fellow. He is a recipient of Indian government BOYSCAST fellowship. Welcome!

April 2009: Kristy Kormondy joined our group as a REU student. She is a sophomore in physics

March 2009: Biddut received  Honorable mention in American Vacuum Society, Florida Chapter meeting in materials characterization category

February 2009:  Paul's paper on Solution processed large area field effect transistors from dielectrophoreticly aligned arrays of single-walled carbon nanotubes is accepted for publication in Applied Physics Letters

January 2009:  Paul's paper on Photoresponse in large area multi-walled carbon nanotube/ polymer nanocomposite films  is accepted for publication in Applied Physics Letters

January 2009: Daeha Joung joined our group. He is a graduate student in physics. Welcome!

2008

November 2008: Shashank Shekhar joined our group as a postdoctoral fellow. Welcome!

August 2008: Biddut Sarker joined our group. He is a graduate student in physics. Welcome!

July 2008: Mohammad Arif joined our group as a postdoctoral fellow. Welcome!

July 2008:  Paul's paper on carbon nanotube single electron transistor is published in Applied Physics Letter. To read the paper click here

May 2008:  Several achievements of our group is highlighted in the first edition of Nano News letter. Read here

April 2008: Our proposal on a novel organic photovoltaic device is funded by National Science Foundation.

April 2008: Paul Stokes is selected as one of the  participants from USA to attend Meetings of Nobel Laureates in Linadu, Germany (www.lindau-nobel.de ).  He will be listening to Nobel prize winners lectures, have dinners with them etc for seven days. This is going to be very exciting for Paul. Congrats Paul
 

April 2008: Paul received best poster award at 2008 UCF research week for his poster entitled, "Local-Gated Single-Walled Carbon Nanotube Field Effect Transistors Assembled by AC Dielectrophoresis" Congrats Paul.


April
2008: Paul's paper published in Nanotechnology is featured in nanotechweb.org (read the story here)

 

March 2008: Paul's paper on local gated DEP assembled FET is accepted and published in Nanotechnology. Congratulation to Paul.

March 2008: Our group made five presentations in APS March meeting in New Orleans. For details please click here

February 2008: Rachel (high school student) placed second in Seminole county science fair for her work on carbon nanotube IR sensor. She is also accepted in UF for her college. Congrats Rachel.

January 2008: Eliot Silbar joined our group as a REU student. He is a freshman student in physics.

January 2008: Dr. Khondaker received prestigious NSF CAREER award (read UCF press release here)

2005-2007

September 2007: Liwei got Associate Professor position at Suzhou Nano Institute, Chinese Academy of Sciences. congrats Liwei!!!

August 2007: Paul passed his qualifier exam, congratulations!

September 2006: Dr. Liwei Liu joined our group as a postdoctoral fellow. He received Ph.D. in physics from Institute of Physics, Chinese Academy of Sciences. Welcome Liwei!!!

April 2006: We got a closed cycle helium refrigerator from Dr. Lee Chow. Special thanks to Dr. Chow!

March 2006: We got a glove box from Dr. Brian Tonner. Special thanks to Dr. Tonner!

February 2006: We received our 1.5 K cryostat from Desert Cryogenics.

January 2006: Paul Stokes joined our group as a Ph.D. student. Paul received his B.S in Physics from the West Virginia University. Welcome Paul!

July 2005: Dr. Khondaker joined UCF nanoscience technology center as an assistant professor.

Funding:

        

 CAREER

 

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