Academic Summary

I am a materials scientist working in the Center for Functional Nanomaterials at Brookhaven National Laboratory. My work focuses on self-assembled nanostructures, and structural characterization using x-ray and neutron techniques (small-angle scattering, reflectivity, etc.). I manage the CFN involvement in the X9 beamline at Brookhaven's National Synchrotron Light Source, an instrument capable of small- and wide-angle x-ray scattering in both transmission and reflection mode (SAXS/WAXS/GISAXS/GIWAXS).

I obtained my Ph.D. from McGill University, Department of Chemistry, in 2006. I then spent 3 years as a guest researcher in the Polymers Division at NIST. This page summarizes my scientific work. (See also my other abilities and interests.)

Research Interests

My research focuses on materials science and nanotechnology. Currently I'm most interested in stimulated and directed self-assembly. I work in the Soft/Bio Nanomaterials group in the CFN. My current research focuses on block-copolymers, and investigating how processing effects can control the morphology and orientation of these self-assembled nanostructures. I am actively developing reflectivity and scattering techniques (off-specular neutron reflectometry, small-angle neutron scattering (SANS), grazing-incidence x-ray scattering (GISAXS), etc.) as characterization methods for quantitatively determining the three-dimensional order in nanostructured soft materials.

Research Experience

2010-present Materials Scientist, Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, USA. Currently studying topics in stimulated self-assembly, and structural determination using x-ray scattering methods. Co-managing the X9 SAXS/WAXS/GISAXS beamline at NSLS.

2006-2009 Guest Researcher, Polymers Division, National Institute of Standards and Technology, Gaithersburg, MD, USA. Awarded a NSERC Canada Postdoctoral Fellowship to pursue studies of soft materials. Researched focused on directing self-assembly of nanostructures, and quantifying three-dimensional order using scattering techniques (neutron and x-ray).

2004-2006, Collaboration with the Canadian Neutron Beam Centre, Chalk River, Canada. Studied water localization in polyelectrolyte thin films, and photo-response of azo-polymers. Helped design and test prototype sample environments.

2001-2006 Graduate Researcher, Department of Chemistry, McGill University, Montreal, Canada. Conducted advanced research on photo-responsive azobenzene polymers, characterizing their photo-mechanical response to holographic laser irradiation. Also studied self-assembly of polyelectrolyte multilayers.

Further details on my research experience are available.

Education

2001–2006 McGill University Montreal, QC
Ph.D. Chemistry. Thesis on photo-responsive polymers successfully defended October 2006.
1998–2001 McGill University Montreal, QC
B.Sc. Honours Chemistry, Minor Computer Science with First-Class Honours. Elective courses in Mathematics and Physics were also completed.

Recent Awards

  • NIST MSEL Associate Award: Given in recognition of a significant individual scientific achievement (2008).
  • MSED/LANXESS Graduate Thesis Award: Awarded to the most outstanding thesis in polymer science in Canada (2008).
  • Sigma Xi Postdoctoral Presentation Award: Awarded for the best poster presentation (2008).
  • NSERC Postdoctoral Fellowship: Prestigious national award given on the basis of research excellence (2007).
  • CSC Energy Materials Presentation Award: Awarded for the best oral presentation in the Energy Storage and Conversion Materials Symposium of the 89th CSC (2006).
  • Robert Zamboni Chemistry Prize: Conference travel grant awarded for research excellence (2006).
  • CINS Chalk River Laboratories Student Travel Award: Awarded based on quality of completed research, to cover research travel costs (2006).
  • Alma Mater Student Travel Grant: Awarded to an accomplished graduate student for presentation of research results (2005).
  • Udho, Parsini, Diwan Award in Chemistry: Awarded for the best research paper published by a graduate student in the Department of Chemistry (2005).
  • CSC-Montreal Graduate Award: Awarded to a distinguished student to cover expenses for travel to an international conference (2005).
  • MSED National Graduate Research Presentation Award: Awarded for best presentation at the CSC Conference, MSED division (2004).
  • David J. Simkin Award in Physical Chemistry: Awarded for the best graduate student research in the physical chemistry division (2004).
  • T. Sterry Hunt Teaching Award in Chemistry: Awarded for excellence in undergraduate teaching (2003).
  • FCAR/FQRNT B2: Provincial scholarship, given on the basis of current and projected research excellence (2003).
  • Department of Chemistry Scholarship: A supplemental award given to graduate students in recognition of scholarships awarded (2003).
  • NSERC PGS B: National scholarship for continued research excellence (2003).
  • FCAR/FQRNT B1: Provincial scholarship, given on the basis of research potential and undergraduate performance (2002).
  • R.F. Robertson Award in Physical Chemistry: Awarded to the student with the highest performance in the physical chemistry laboratory (2001).
  • CSC National Conference Undergraduate Poster Award: Awarded for best divisional poster presentation (2001).
  • Undergraduate Honours Poster Competition: Awarded to the best honours project presentation (2000).

Publications

Johnston, D.E.; Yager, K.G.; Hlaing, H.; Lu, X.; Ocko, B.M.; Black, C.T. "Nanostructured Surfaces Frustrate Polymer Semiconductor Molecular Orientation" ACS Nano 2014, ASAP, in press. [ summarydoi ]
Yager, K.G.; Zhang, Y.; Lu, F.; Gang, O. "Periodic lattices of arbitrary nano-objects: modeling and applications for self-assembled systems" Journal of Applied Crystallography 2014, 47, in press. [ summarydoi ]
Smith, K.A.; Pickel, D.L.; Yager, K.G.; Kisslinger, K.; Verduzco, R. "Conjugated block copolymers via functionalized initiators and click chemistry" Journal of Polymer Science Part A: Polymer Chemistry 2014, 52, 154–163. [ summarydoi ]
Li, F.; Yager, K.G.; Dwson, N.M.; Yang, J.; Malloy, K.J.; Qin, Y. "Complementary Hydrogen Bonding and Block Copolymer Self-Assembly in Cooperation toward Stable Solar Cells with Tunable Morphologies" Macromolecules 2013, 46, 9021–9031. [ summarydoi ]
Zhang, Y.; Lu, F.; Yager, K.G.; van der Leli, D.; Gang, O. "A general strategy for the DNA-mediated self-assembly of functional nanoparticles into heterogeneous systems" Nature Nanotechnology 2013, 8, 865–872. [ summarydoi ]
Xue, J.; Singh, G.; Qiang, Z.; Yager, K.G.; Karim, A.; Vogt, B.D. "Facile control of long range orientation in mesoporous carbon films with thermal zone annealing velocity" Nanoscale 2013, 5, 12440–12447. [ summarydoi ]
Kim, S.; Dura, J.A.; Page, K.A.; Rowe, B.W.; Yager, K.G.; Soles, C.L. "Surface-Induced Nanostructure and Water Transport of Thin Proton-Conducting Polymer Films" Macromolecules 2013, 46, 5630–5637. [ summarydoi ]
Vial, S.; Nykypanchuk, D.; Yager, K.G.; Tkachenko, A.V.; Gang, O. "Linear Mesostructures in DNA–Nanorod Self-Assembly" ACS Nano 2013, 7, 5437–5445. [ summarydoi ]
Singh, G.; Batra, S.; Zhang, R.; Yuan, H.; Yager, K.G.; Cakmak, M.; Berry, B.; Karim, A. "Large-Scale Roll-to-Roll Fabrication of Vertically Oriented Block Copolymer Thin Films" ACS Nano 2013, 7, 5291–5299. [ summarydoi ]
Lu, X.; Yager, K.G.; Johnston, D.; Black, C.T.; Ocko, B.M. "Grazing-incidence transmission X-ray scattering: surface scattering in the Born approximation" Journal of Applied Crystallography 2013, 46, 165–172. [ summarydoi ]
Kelly, J.G.; He, W.; Somarajan, S.; Yager, K.G.; Dickerson, J.H. "Wide angle x-ray diffraction studies of nanocrystalline lead europium sulfide" Materials Letters 2012, 89, 198–201. [ summarydoi ]
Singh, G.; Yager, K.G.; Berry, B.; Kim, H.-C.; Karim, A. "Dynamic Thermal Field-Induced Gradient Soft-Shear for Highly Oriented Block Copolymer Thin Films" ACS Nano 2012, 6 (11), 10335–10342. [ summarydoi ]
Eastman, S.A.; Yager, K.G.; Kim, S.; Page, K.A.; Rowe, B.W.; Kang, S.; Soles, C.L. "Effect of Confinement on Structure, Water Solubility, and Water Transport in Nafion Thin Films" Macromolecules 2012, 45 (19), 7920–7930. [ summarydoi ]
Singh, G.; Yager, K.G.; Smilgies, D.-M.; Kulkarni, M.M.; Bucknall, D.G.; Karim, A. "Tuning Molecular Relaxation for Vertical Orientation in Cylindrical Block Copolymer Films via Sharp Dynamic Zone Annealing" Macromolecules 2012, 17, 7107–7117. [ summarydoi ]
Allen, J.E.; Ray, B.; Khan, M.R.; Yager, K.G.; Alam, M.A.; Black, C.T. "Self-assembly of single dielectric nanoparticle layers and integration in polymer-based solar cells" Applied Physics Letters 2012, 101, 063105. [ summarydoi ]
Johnston, D.E.; Yager, K.G.; Nam, C.-Y.; Ocko, B.M.; Black, C.T. "One-Volt Operation of High-Current Vertical Channel Polymer Semiconductor Field-Effect Transistors" Nano Letters 2012, 8, 4181–4186. [ summarydoi ]
Kang, S.J.; Kim, J.B.; Chiu, C.-Y.; Ahn, S.; Schiros, T.; Lee, S.S.; Yager, K.G.; Toney, M.F.; Loo, Y.-L.; Nuckolls, C. "A Supramolecular Complex in Small-Molecule Solar Cells based on Contorted Aromatic Molecules" Angewandte Chemie International Edition 2012, 34, 8594–8597. [ summarydoi ]
Mahimwalla, Z.; Yager, K.G.; Mamiya, J.-i.; Shishido, A.; Priimagi, A.; Barrett, C.J. "Azobenzene photomechanics: prospects and potential applications" Polymer Bulletin 2012, 69 (8), 967–1006. [ summarydoi ]
Schedel, M.; Yager, K.G. "Hearing Nano-Structures: A Case Study in Timbral Sonification" International Conference on Auditory Display 2012, 18, 95–98. [ summarydoi ]
Kulkarni, M.M.; Yager, K.G.; Sharma, A.; Karim, A. "Combinatorial Block Copolymer Ordering on Tunable Rough Substrates" Macromolecules 2012, 45, 4303–4314. [ summarydoi ]
Allen, J.E.; Yager, K.G.; Nam, C.-Y.; Hlaing, H.; Ocko, B.M.; Black, C.T. "Implementing nanometer-scale confinement in organic semiconductor bulk heterojunction solar cells" Journal of Photonics for Energy 2012, 2, 021008. [ summarydoi ]
Schiros, T.; Mannsfeld, S.; Chiu, C.-y.; Yager, K.G.; Ciston, J.; Gorodetsky, A.A.; Palma, M.; Bullard, Z.; Kramer, T.; Delongchamp, D.; Fischer, D.; Kymissis, I.; Toney, M.F.; Nuckolls, C. "Reticulated Organic Photovoltaics" Advanced Functional Materials 2012, 22, 1167–1173. [ summarydoi ]
Schedel, M.; Fox-Gied, N.; Yager, K.G. "A Modern Instantiation of Schillinger's Dance Notation: Choreographing with Mouse, iPad, KBow, and Kinect" Contemporary Music Review 2011, 30, 179–186. [ summarydoi ]
Allen, J.E.; Yager, K.G.; Nam, C.-Y.; Ocko, B.M.; Black, C.T. "Enhanced charge collection in confined bulk heterojunction organic solar cells" Applied Physics Letters 2011, 99, 163301. [ summarydoi ]
Hlaing, H.; Lu, X.; Hofmann, T.; Yager, K.G.; Black, C.T.; Ocko, B.M. "Nanoimprint-Induced Molecular Orientation in Semiconducting Polymer Nanostructures" ACS Nano 2011, 5, 7532–7538. [ summarydoi ]
Wolcott, A.; Doyeux, V.; Nelson, C.A.; Gearba, R.; Lei, K.W.; Yager, K.G.; Dolocan, A.D.; Williams, K.; Nguyen, D.; Zhu, X.-Y. "Anomalously Large Polarization Effect Responsible for Excitonic Red Shifts in PbSe Quantum Dot Solids" Journal of Physical Chemistry Letters 2011, 2, 795–800. [ summarydoi ]
Forrey, C.; Yager, K.G.; Broadaway, S.P. "Molecular Dynamics Study of the Role of the Free Surface on Block Copolymer Thin Film Morphology and Alignment" ACS Nano 2011, 5, 2895–2907. [ summarydoi ]
Galley, W.C.; Tanchak, O.M.; Yager, K.G.; Wilczek-Vera, G. "Excited-State Processes in Slow Motion: An Experiment in the Undergraduate Laboratory" Journal of Chemical Education 2010, 87, 1252–1256. [ summarydoi ]
Zhang, X.; Yager, K.G.; Fredin, N.J.; Ro, H.W.; Jones, R.L.; Karim, A.; Douglas, J.F. "Thermally Reversible Surface Morphology Transition in Thin Diblock Copolymer Films" ACS Nano 2010, 7, 3653–3660. [ summarydoi ]
Song, L.; Feng, D.; Fredin, N.J.;Yager, K.G.; Jones, R.L.; Wu, Q.; Zhao, D.; Vogt, B.D. "Challenges in fabrication of mesoporous carbon films with ordered cylindrical pores via phenolic oligomer self-assembly with triblock copolymers" ACS Nano 2010, 1, 189–198. [ summarydoi ]
Song, L.; Feng, D.; Campbell, C.G.; Gu, D.; Forster, A.M.; Yager, K.G.; Fredin, N.; Lee, H.-J.; Jones, R.L.; Zhao, D.; Vogt, B.D. "Robust conductive mesoporous carbon–silica composite films with highly ordered and oriented orthorhombic structures from triblock-copolymer template co-assembly" Journal of Materials Chemistry 2010, 20, 1691–1701. [ summarydoi ]
Zhang, X.; Yager, K.G.; Kang, S.; Fredin, N.J.; Akgun, B.; Satija, S.; Douglas, J.F.; Karim, A.; Jones, R.L. "Solvent Retention in Thin Spin-Coated Polystyrene and Poly(methyl methacrylate) Homopolymer Films Studied By Neutron Reflectometry" Macromolecules 2010, 2, 1117–1123. [ summarydoi ]
Yager, K.G.; Fredin, N.J.; Zhang, X.; Berry, B.C.; Karim, A.; Jones, R.L. "Evolution of block-copolymer order through a moving thermal zone" Soft Matter 2010, 1, 92–99 . [ summarydoi ]
Zhang, X.; De Paoli Lacerda, S.H.; Yager, K.G.; Berry, B.C.; Douglas, J.F.; Jones, R.L.; Karim, A. "Target Patterns Induced by Fixed Nanoparticles in Block Copolymer Films" ACS Nano 2009, 3, 2115–2120. [ summarydoi ]
Yager, K.G.; Berry, B.C.; Page, K.; Patton, D.; Karim, A.; Amis, E.J. "Disordered Nanoparticle Interfaces for Directed Self-Assembly" Soft Matter 2009, 5, 622–628. [ summarydoi ]
Zhang, X.; Berry, B.C.; Yager, K.G.; Kim, S.; Jones, R.L.; Satija, S.; Pickel, D.L.; Douglas, J.F.; Karim, A. "Surface Morphology Diagram for Cylinder-Forming Block Copolymer Thin Films" ACS Nano 2008, 2, 2331–2341. [ summarydoi ]
Tanchak, O.M.; Yager, K.G.; Fritzsche, H.; Harroun, T.; Katsaras, J.; Barrett, C.J. "Ion distribution in multilayers of weak polyelectrolytes: A neutron reflectometry study" Journal of Chemical Physics 2008, 129, 084901. [ summarydoi ]
Barrett, C.J.; Mamiya, J.; Yager, K.G.; Ikeda, T. "Photo-mechanical Effects in Azobenzene-containing Soft Materials" Soft Matter 2007, 3, 1249–1261. [ summarydoi ]
Yager, K.G.; Barrett, C.J. "Confinement of Surface Patterning in Azo-Polymer Thin Films" Journal of Chemical Physics 2007, 126, 094908. [ summarydoi ]
Yager, K.G.; Barrett, C.J. "Photomechanical Surface Patterning in Azo-Polymer Materials" Macromolecules 2006, 39, 9320. [ summarydoi ]
Yager, K.G.; Tanchak, O.M.; Godbout, C.; Fritzsche, H.; Barrett, C.J. "Photomechanical Effects in Azo-Polymers Studied by Neutron Reflectometry" Macromolecules 2006, 39, 9311. [ summarydoi ]
Yager, K.G.; Barrett, C.J. "Novel Photoswitching using Azobenzene Functional Materials" Journal of Photochemistry and Photobiology A: Chemistry 2006, 182, 250. [ summarydoi ]
Tanchak, O.M.; Yager, K.G.; Fritzsche, H.; Harroun, T.A.; Katsaras, J.; Barrett, C.J. "Water Distribution in Multilayers of Weak Polyelectrolytes" Langmuir 2006, 22, 5137. [ summarydoi ]
Yager, K.G.; Tanchak, O.M.; Barrett, C.J.; Watson, M.J.; Fritzsche, H. "Temperature-controlled neutron reflectometry sample cell suitable for study of photoactive thin films" Review of Scientific Instruments 2006, 77, 045106. [ summarydoi ]
Harroun, T.A.; Fritzsche, H.; Watson, M.J.; Yager, K.G.; Tanchak, O.M.; Barrett, C.J.; Katsaras, J. "Variable temperature, relative humidity (0%–100%), and liquid neutron reflectometry sample cell suitable for polymeric and biomimetic materials" Review of Scientific Instruments 2005, 76, 065101. [ summarydoi ]
Yager, K.G.; Barrett, C.J. "Temperature Modelling of Laser-Irradiated Azo Polymer Films" Journal of Chemical Physics 2004, 120, 1089–1096. [ summarydoi ]
Yager, K.G.; Barrett, C.J. "All-Optical Patterning of Azo Polymer Films" Current Opinion in Solid State and Materials Science 2001, 5, 487–494. [ summarydoi ]

Contact

Kevin G. Yager
Assistant Materials Scientist
Center for Functional Nanomaterials (Bldg. 735)
Brookhaven National Laboratory
P.O. Box 5000
(2 Center Street)
Upton, NY 11973-5000

Phone: 631-344-7608
Fax: 631-344-7773
Email: kyager@bnl.gov