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Christopher Sims (Fed)

Research Chemist

Dr. Christopher M. Sims is a Research Chemist in the Materials Science and Engineering Division (MSED) within the Material Measurement Laboratory (MML) at the National Institute of Standards and Technology (NIST). A native Marylander, he received a B.S. in Chemistry from the University of Maryland, Baltimore County (UMBC), where he was a Meyerhoff Scholar, and a Ph.D. in Chemistry from the University of Maryland, College Park (UMD), where he was a Dolphus E. Milligan Graduate Fellow. With a background in nanomaterial synthesis and characterization, Christopher joined NIST as a National Research Council Postdoctoral Research Associate in the Biosystems and Biomaterials Division, where his research focused on the development of new methods for measuring the physicochemical properties of engineered nanomaterials and understanding how these physicochemical properties influence nanomaterial interactions with biological and environmental systems.

Christopher is currently a member of the Particles, Tubes, and Colloids Project Team within MSED, which aims to develop measurement methods and technologies to enable and improve commerce of dispersed objects such as nanoparticles, colloids, and biomolecules. A current research focus is the development of methods enabling more efficient separations and isolations of single-wall carbon nanotubes (SWCNTs), allowing for improved characterization of SWCNT properties and in turn, facilitation of SWCNT technology development. Christopher is also developing methods for characterizing particle suspensions and colloidal systems using analytical ultracentrifugation (AUC), a technique that optically monitors the sedimentation of the analyte of interest during centrifugation. Through careful control of experimental design and subsequent data analysis, AUC can obtain quantitative information on the analyte of interest, such as its density, size distribution, and interactions with other species within the system.


2016 International Nanotoxicology Congress Travel Award

2015 National Research Council Postdoctoral Research Associateship

2013-2014 Ann G. Wylie Dissertation Fellowship

2011-2013 Graduate Assistance in Areas of National Need (GAANN) Fellowship

2008-2010 Dolphus E. Milligan Graduate Fellowship

2008 Sigma Xi: The Scientific Research Society

2008 The Phi Beta Kappa Society

2004-2008 UMBC Meyerhoff Scholarship


A Reference High-Pressure CH4 Adsorption Isotherm for Zeolite Y: Results of an Interlaboratory Study

Huong Giang T. Nguyen, Christopher M. Sims, Blaza Toman, Jarod C. Horn, Roger D. van Zee, Mathias Thommes, Riaz Ahmad, Joeri F. Denayer, Gino V. Baron, Emilio Napolitano, Marek Bielewski, Enzo Mangano, Stefano Brandani, Broom Darren, M.J. Benham, Anne Dailly, Frieder Dreisbach, Satyannarayana Edubilli, Sasidhar Gumma, Jens Mollmer, Marcus Lange, Mi Tian, Tim Mays, T. Shigeoka, S. Yamakita, M. Hakuman, Y. Nakada, K. Nakai, Junyoung Hwang, Ronny Pini, Huan Jiang, Armin Ebner, Marjorie Nicholson, James Ritter, Judit Farrando Perez, Carlos Cuadrado, Joaquin Silvestre Albero, Christos Tampaxis, Theodore Steriotis, Daniela Rimnacova, Martina Svabova, Maryna Vorokhta, Hai Wang, Eric Bovens, Nicolas Heymans, Guy de Weireld
This paper reports the results of an international interlaboratory study led by the National Institute of Standards and Technology (NIST) on the measurement of

Counting Caenorhabditis elegans: Protocol Optimization and Applications for Population Growth and Toxicity Studies in Liquid Medium

Steven Lund, Sanem Hosbas Coskun, Monique Johnson, Christopher Sims, Elijah Petersen, John T. Elliott, Bryant C. Nelson, Leona D. Scanlan, Shannon K. Hanna, Karina Brignoni, Patricia Lapasett
The nematode Caenorhabditis elegans is used extensively in molecular, toxicological and genetics research. However, standardized methods for counting nematodes
Created June 4, 2019, Updated June 15, 2021