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Andrei Kolmakov (Fed)

Dr. Andrei Kolmakov is a Project Leader in Nanoscale Imaging Group/ Nanoscale Device Characterization Division at NIST. He received an M.S. in Physics from the Moscow Institute of Physics and Technology, Russia and a Ph.D. in Physics from the National Research Center, Kurchatov Institute, Russia. Following his postdoctoral work at the ELETTRA and HASYLAB synchrotrons, he joined the research staff at Texas A&M University and conducted original in situ STM studies on individual supported metal clusters under reaction conditions. Expanding nanotechnology applications of low dimensional materials at the Department of Chemistry and Biochemistry at UC-Santa Barbara, he performed seminal research in the field of gas sensorics with metal oxide nanowires. Prior to joining the CNST at NIST, Prof. Kolmakov was a faculty member in the Department of Physics at Southern Illinois University, Carbondale, where his group developed new device architectures and principles for chemical sensing with low dimensional materials. His group also employed modern synchrotron radiation based spectro-microscopy techniques such as SPEM, PEEM and X-ray microdiffraction as well as scanning probe and electron microscopy for in situ and in vivo characterization of individual working nanodevices. Andrei has also pioneered the application of ultrathin 2D materials as electron transparent membranes for (photo-)electron (XPS, PEEM, AES, XAS, SEM) spectro-microscopies in liquids and dense gases. He has published over 150 research papers, several review articles and book chapters, co-authored three patents and has co-edited a book on nanostructured metal oxide sensing systems. Andrei’s current research interests are in the developing of the methodology and instrumentation for in situ electron (and X-ray) imaging and spectroscopic characterization of nanodevices and working interfaces in operando mode under realistic environments, including liquid, dense gaseous and plasma media.


  • Nanofluidic XPS: Development of XPS, AES, PEEM, XAS spectromicroscopy on a nanofluidic chip using graphene as electron transparent membranes
  • SEM in liquids, gases and plasmas: Development of a measurement platform for in situ imaging and microanalysis of nanodevices, objects, and active interfaces under realistic working conditions, e.g., resistive switching, chemical sensing, electrochemical reaction or during plasma processing, ALD, etc.

Selected Publications

  • Enabling Photoemission Electron Microscopy in Liquids via Graphene-Capped Microchannel Arrays, Guo H. X. Strelcov E., Yulaev A., Wang J., Appathurai N., Urquhart S., Vinson J., Sahu S., Zwolak M., Kolmakov A., Nano Letters, 17(2), 1034-1041, (2017)
  • Seeing through Walls at the Nanoscale: Microwave Microscopy of Enclosed Objects and Processes in Liquid, Tselev A., Velmurugan J., Ievlev A. V., Kalinin S. V., Kolmakov A., ACS Nano 10 (3), 3562-3570
  • Graphene oxide windows for in situ environmental cell photoelectron spectroscopy, A. Kolmakov, D. A. Dikin, L. J.  Cote, J. Huang, M. K. Abyaneh, M. Amati, L. Gregoratti, S. Guenther, and M.  Kiskinova, Nature Nanotechnology 6, 651–657 (2011).
  • Gas sensor based on metal-insulator transition in VO2 nanowire thermistor, E. Strelcov, Y. Lilach, and A. Kolmakov, Nano Letters 9, 2322–2326 (2009).

Google Scholar Profile

Research Opportunities

We are looking for talented postdoctoral associates. US citizens are welcomed to consider NRC Research Associates Program with NIST.

Current research lines (but not limited):


Probing Electrified Liquid-Solid Interfaces with Scanning Electron Microscopy

Hongxuan Guo, Alexander Yulaev, Evgheni Strelcov, Alexander Tselev, Christopher M. Arble, Andras Vladar, John S. Villarrubia, Andrei A. Kolmakov
The mean free path of secondary electrons in aqueous solutions is on the order of a nanometer, making them a suitable probe of ultrathin electrical double

Electron and x-ray focused beam-induced cross-linking in liquids: Toward rapid continuous 3D nanoprinting and interfacing using soft materials

Tanya Gupta, Evgheni Strelcov, Glenn E. Holland, Joshua D. Schumacher, Yang Yang, Mandy B. Esch, Vladimir A. Aksyuk, Patrick Zeller, Matteo Amati, Luca Gregoratti, Andrei A. Kolmakov
Additive fabrication of biocompatible 3D structures out of liquid hydrogel solutions has become pivotal technology for tissue engineering, soft robotics

Extraordinary performance of semiconducting metal oxide gas sensors using dielectric excitation

Andrei A. Kolmakov, Radislav A. Potyrailo, Steven Go, Daniel Sexton, Xiaxi Li, Nasr Alkadi, Bruce Amm, Richard St-Pierre, Brian Scherer, Majid Nayeri, Guang Wu, Christopher Collazo-Davila, Doug Forman, Chris Calvert, Craig Mack, Philip Mcconnell
Electrical response of metal oxide semiconducting (MOS) materials to gases was discovered 70 years ago [1] and miniature low-cost MOS chemiresistors became the
Created October 23, 2018, Updated June 15, 2021