Briber, Robert M.
Ph.D., University of Massachusetts, Amherst, 1984
X-ray and neutron scattering, thermodynamics, structure of polymers.
Please see Professor Briber's C.V. (PDF).
Current Research Projects
Synthesis and Characterization of Structured Hydrogels
Charged polymers (polyelectrolytes) and surfactant systems can have strong associations due to coulombic interactions and have been shown to form complex structures. We are extending these systems to hydrogels, where the polymer is crosslinked in the presence of an ordered surfactant system to form a structured hydrogel.
Data Analysis and Modeling of Off Specular Neutron Reflectivity
Specular neutron reflectivity is a powerful characterization tool for studying the structure of thin films in the film normal direction. Off specular reflectivity has the potential to extend the analysis to structure in the x-y plane of the film, but has been hampered by lack of suitable data analysis and modeling tools. We are working the NIST Center for Neutron Research to develop such tools and establish principles for analyzing such data using model systems.
Synthesis and Characterization of Nanocomposites with Improved Flammability
Polymer nanocomposites formed from layered silicates have been shown to have improved mechanical properties silicate is distributed in an exfoliated or intercalated morphology. We are working with collaborators in both the Fire Protection Engineering Department at the University of Maryland and the Fire Research Division at NIST to synthesis and characterize polymer nanocomposites with improved flammability.
Structure of Nanoporous Low K Dielectric Materials
We are working with IBM on the characterization of nanoporous films of spin on glass materials where the nanoporosity is formed by mixing the spin-on glass with a polymer prior to cure. During the high temperature cure of the spin-on glass the polymer degrades resulting in a nanoporous morphology to the thin film.
Folding of RNA
RNAs perform many biological functions by folding into specific three-dimensional structures. Understanding how RNAs fold is crucial for understanding the assembly of RNA-protein complexes such as the ribosome, the regulation of gene expression by RNA, and the engineering of RNA sensors and "riboswitches". In the presence of counterions, RNAs collapse into compact intermediates, which subsequently fold into the native tertiary structure. We are addressing these questions using X-ray and neutron scattering to address the structure, kinetics and dynamics of the RNA folding process.
Professor Briber teaches a range of classes at both the undergraduate and graduate level. At the undergraduate level he has taught:
- ENES 100: Introduction to Engineering Design
ENMA 150: Materials of Civilization
This is a University of Maryland Marquee Science and Technology Course designed for non-science majors. See www.marqueecourses.umd.edu for more information.
- ENMA 300: Introduction to Materials and Their Applications
- ENMA 423: Manufacturing with Polymers
At the graduate level, Dr. Briber has taught:
- ENMA 620: Polymer Physics (MSE Graduate Program core course)
- ENMA 661: Kinetics of Reactions in Materials (MSE Graduate Program core course)
Honors and Awards
- American Physical Society, Fellow (elected 1995)
- Department of Commerce Bronze Medal, December 1990
- Electron Microscope Society of America Presidential Student Scholarship, 1982
- Editor, Journal of Polymer Science—Polymer Physics Edition (1/99-01/07)
Professional Elected Offices
- Neutron Scattering Society of America, President 2002-2005
- Neutron Scattering Society of America, vice president 1999-2002
- Member-at-Large to the Executive Committee of the Division of Polymer Physics, American Physical Society, 1999-2002
- American Physical Society (Fellow)
- Neutron Scattering Society of America
- Materials Research Society
- American Chemical Society
- Biophysical Society
Professional Committee Memberships
- NIST Center for Neutron Research Program Advisory Committee, member 1999 to 2004
- University of Chicago Review Committee for the Intense Pulsed Neutron Source at Argonne National Laboratory 1997, 1999, 2001
- Large Length Scales Working Group, Spallation Neutron Source, Oak Ridge National Lab, Dept. of Energy, November 1998
- Basic Energy Science Advisory Committee Review of the High Flux Isotope Reactor at Oak Ridge National Lab, October 1998
- Scheduling Committee, American Physical Society, Division of High Polymer Physics March Meeting, 1994-1998
- Los Alamos—Argonne National Laboratory Pulsed Neutron Source Program Advisory Committee 1993-1997 (Chair 1996-97)
- Society of Plastics Engineers (SPE) Research Award Committee, 1994-1997
- American Physical Society Division of High Polymer Physics Nominations Committee
- NASA Microgravity Research Review Panel for Polymers, 1995, 1997
B. Cipriano, S. Banik, R. Sharma, D. Rumore, W. Hwang, R.M. Briber, S. Raghavan, “Superabsorbent Hydrogels that are Robust and Highly Stretchable”, Macromolecules, 2014, (47)13, 4445-4452, DOI 10.1021/ma500882n
Ruiliang Bai, Peter J. Basser, R.M. Briber and Ferenc Horkay, “NMR Water Self–Diffusion and Relaxation Studies on Sodium Polyacrylate Solutions and Gels in Physiologic Ionic Solutions”, J. of Applied Polymer Science 2014, 131(6), DOI: 10.1002/app.40001
Bergstrom, R., Jr.; Wuttig, M.; Cullen, J.; Zavalij, P.; Briber, R.; Dennis, C.; Garlea, V. O.; Laver, M., "Morphotropic Phase Boundaries in Ferromagnets: Tb1-XDyX Fe2 Alloys", Physical Review Letters 2013, 111, (1), 017203 DOI: 10.1103
J. Duncan Kilburn, Joon Ho Roh, Behrouzi, Reza, R.M. Briber, Sarah A. Woodson, “Crowders perturb the entropy of RNA energy landscapes to favor folding”, JACS 2013, 135, 10055
Ayyub, O. B.; Ibrahim, M. B.; Briber, R. M.; Kofinas, P., "Self-Assembled Block Copolymer Photonic Crystal for Selective Fructose Detection", Biosens Bioelectron 2013, 46, 124-129, DOI 10.1016/J.Bios.2013.02.025.
Wonjoo Lee, Seung Yong Lee, X. Zhang, R.M. Briber and Oded Rabin “Hexagonally ordered nanoparticles templated using a block copolymer film”, Nanotechnology, 2013, 24, 045305
B.J. Watson, B. Hammouda, R.M. Briber, and S.W. Hutcheson; “Influence of Organic Liquids on the Nanostructure of Precipitated Cellulose”, J. of Applied Polym. Sci. 2013, 127(4), 2620-2627 DOI: 10.1002/app.37540
Wonjoo Lee, Peter Kofinas, R.M. Briber; “Structure investigation of poly((2-dimethylamino)ethyl methacrylate)/sodium dodecylsulfate complexes in concentrated poly((2-dimethylamino)ethyl methacrylate) solutions using small angle neutron scattering”, Polymer, 2012, 53(14), 2942-2948 DOI: 10.1016/j.polymer.2012.04.052
Zhang, X.; Sushkov, A. B.; Metting, C. J.; Fackler, S.; Drew, H. D.; Briber, R. M., "Silicon Patterning Using Self-Assembled Ps-B-Paa Diblock Copolymer Masks for Black Silicon Fabrication Via Plasma Etching", Plasma Processes and Polymers 2012, 9 (10), 968-974, Doi 10.1002/Ppap.201100198.
Reza Behrouzi, Joon Ho Roh, Duncan Kilburn, R. M. Briber, Sarah A. Woodson, “Native architecture encodes cooperativity and specificity in RNA folding intermediates”, Cell 2012, 149, 348–357
Sangcheol Kim, Jack F. Douglas, Christopher L. Soles, Alamgir Karim, and R. M. Briber; “Using Block Copolymer Self-Assembly to Imprint the Crystallization of Polymer Dendrites”, Soft Matter, 2011, 7, 8969-8976. DOI: 10.1039/C1SM05768E
Lee, W., Zhang, X., & Briber, R.M., A simple method for creating nanoporous block-copolymer thin films. Polymer 51 (11), 2376-2382 (2010).
Khodadadi, S. et al., Dynamics of Biological Macromolecules: Not a Simple Slaving by Hydration Water. Biophysical Journal 98 (7), 1321-1326 (2010).
Roh, J.H. et al., Dynamics of tRNA at Different Levels of Hydration. Biophysical Journal 96 (7), 2755-2762 (2009).
Ren, S.Q., Briber, R.M., & Wuttig, M., Self-organized two-dimensional onions (vol 94, 113507, 2009). Applied Physics Letters 94 (25) (2009).
Ren, S.Q., Briber, R.M., & Wuttig, M., Self-organized two-dimensional onions. Applied Physics Letters 94 (11) (2009).
Moghaddam, S. et al., Metal Ion Dependence of Cooperative Collapse Transitions in RNA. Journal of Molecular Biology 393 (3), 753-764 (2009).
Dandu, R. et al., Silk-elastinlike protein polymer hydrogels: Influence of monomer sequence on physicochemical properties. Polymer 50 (2), 366-374 (2009).
Akcora, P., Briber, R.M., & Kofinas, P., Oxidation effect on templating of metal oxide nanoparticles within block copolymers. Polymer 50 (5), 1223-1227 (2009).
Yun, S.I. et al., Conformation of arborescent polymers in solution by small-angle neutron scattering: Segment density and core-shell morphology. Macromolecules 41 (1), 175-183 (2008).
Ren, S.Q., Briber, R.M., & Wuttig, M., Diblock copolymer based self-assembled nanomagnetoelectric. Applied Physics Letters 93 (17) (2008).
Woodson, S.A. et al., SAXS studies of RNA folding show a dependence on counterion charge density. Biophysical Journal, 48A-48A (2007).
Kim, S., Briber, R.M., Karim, A., Jones, R.L., & Kim, H.C., Environment-controlled spin coating to rapidly orient microdomains in thin block copolymer films. Macromolecules 40 (12), 4102-4105 (2007).
Yun, S.I., Briber, R.M., Kee, R.A., & Gauthier, M., Dilute-solution structure of charged arborescent graft polymer. Polymer 47 (8), 2750-2759 (2006).
Jones, R., Kim, S., Karim, A., Briber, R.M., & Kim, H.C., Orientation of block copolymer phases within confined environments. Abstracts of Papers of the American Chemical Society 231 (2006).
Caliskan, G. et al., Dynamic transition in tRNA is solvent induced. Journal of the American Chemical Society 128 (1), 32-33 (2006).
Akcora, P., Briber, R.M., & Kofinas, P., TEM characterization of diblock copolymer templated iron oxide nanoparticles: Bulk solution and thin film surface doping approach. Polymer 47 (6), 2018-2022 (2006).
Zhang, X., Briber, R.M., & Kashiwagi, T., Molecular weight and filler dispersion on the flammability of PMMA/layered silicate nanocomposites. Abstracts of Papers of the American Chemical Society 230, U3666-U3667 (2005).
Magbitang, T. et al., Templating organosilicate vitrification using unimolecular self-organizing polymers: Evolution of morphology and nanoporosity development with network formation. Advanced Materials 17 (8), 1031-+ (2005).
Lazzeri, P. et al., Thin-film transformations and volatile products in the formation of nanoporous low-k polymethylsilsesquioxane-based dielectric. Journal of Vacuum Science & Technology B 23 (3), 908-917 (2005).
Chauhan, S. et al., RNA tertiary interactions mediate native collapse of a bacterial group I ribozyme. Journal of Molecular Biology 353 (5), 1199-1209 (2005).
Caliskan, G. et al., Persistence length changes dramatically as RNA folds. Physical Review Letters 95 (26), - (2005).
Akcora, P., Zhang, X., Varughese, B., Briber, R.M., & Kofinas, P., Structural and magnetic characterization of norbornene-deuterated norbornene dicarboxylic acid diblock copolymers doped with iron oxide nanoparticles. Polymer 46 (14), 5194-5201 (2005).
Akcora, P., Briber, R.M., & Kofinas, P., Incorporation of iron oxide nanoparticles into microphase separated poly(norbornene)-block-poly(deuterated norbornene dicarboxylic acid) diblock copolymers. Abstracts of Papers of the American Chemical Society 230, U3725-U3726 (2005).
Zhang, X., Briber, R.M., & Kashiwagi, T., Microstructure and flammability of PMMA/layered silicate nanocomposite. Abstracts of Papers of the American Chemical Society 228, U423-U423 (2004).
Voge, G., Fosser, K., Waldow, D., Briber, R., & Halasa, A., Effect of random and block copolymer additives on a homopolymer blend studied by small-angle neutron scattering. Journal of Polymer Science Part B-Polymer Physics 42 (17), 3191-3203 (2004).
Perez-Salas, U.A. et al., Compaction of a bacterial group I ribozyme coincides with the assembly of core helices. Biochemistry 43 (6), 1746-1753 (2004).
McDermott, M.K. et al., Mechanical properties of polyurethane film exposed to solutions of nonoxynol-9 surfactant and poly(ethylene glycol). Journal of Applied Polymer Science 91 (2), 1086-1096 (2004).
Lazzeri, P. et al., ToF-SIMS studies of nanoporous PMSSQ materials: kinetics and reactions in the processing of low-K dielectrics for ULSI applications. Surface and Interface Analysis 36 (4), 304-310 (2004).
Kim, H.C. et al., Effect of molecular architecture of sacrificial porogens on the pore structures of nanoporous organosilicates: A small angle scattering. Abstracts of Papers of the American Chemical Society 227, U554-U554 (2004).
Kashiwagi, T. et al., Flame retardant mechanism of polyamide 6-clay nanocomposites. Polymer 45 (3), 881-891 (2004).
Jones, R.L., Indrakanti, A., Briber, R.M., Muller, M., & Kumar, S.K., Phase behavior of ultrathin polymer mixtures. Macromolecules 37 (18), 6676-6679 (2004).
Zhang, X., Briber, R.M., Kashiwagi, T., & Harris, R.H., Characterization of changes in the clay platelet distribution in polyamide 6/Clay nanocomposites during combustion by TEM and x-ray diffraction. Abstracts of Papers of the American Chemical Society 226, U526-U526 (2003).
Yun, S.I., Briber, R.M., Kee, R.A., & Gauthier, M., Small-angle neutron scattering of arborescent polystyrene-graft-poly(2-vinylpyridine) copolymers. Polymer 44 (21), 6579-6587 (2003).
Perez-Salas, U., Briber, R.M., Rafailovich, M.H., & Sokolov, J., Interfacial fracture toughness between glassy polymer networks. Journal of Polymer Science Part B-Polymer Physics 41 (16), 1902-1908 (2003).
Kim, H.C. et al., Neutron reflectivity on nanoporous poly(methylsilsesquioxane) thin films. Chemistry of Materials 15 (3), 609-611 (2003).
Feng, H.X., Briber, R.M., Lee, V.Y., Miller, R., & Kim, H.C., Supression of dewetting in polystyrene thin films using nanoparticles. Abstracts of Papers of the American Chemical Society 226, U519-U519 (2003).