Academic Summary

I am the group leader for the Electronic Nanomaterials group 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, GISAXS, etc.). I manage the CFN x-ray scattering user program, including managing a nanoscience user program on the X9 beamline at Brookhaven's National Synchrotron Light Source (NSLS). I am now involved in developing next-generation synchrotron scattering instruments at NSLS-II.

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 non-equilibrium self-assembly. In particular, I study how non-equilibrium processing can be used to control the ordering of block-copolymer materials. I have recently demonstrated a suite of techniques that can be used to induce these self-assembling materials to form nanostructures beyond those known at equilibrium. I am also actively developing improved x-ray scattering techniques; especially with regard to exploiting machine-learning to enable autonomous scientific experiments.


2016-present Group Leader, Electronic Nanomaterials Group, Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, USA. Leading a group that studies functional nanomaterials. Currently studying topics in non-equilibrium self-assembly, and structural determination using x-ray scattering methods. Developing a new program on the CMS and SMI beamlines (SAXS/WAXS/GISAXS) at NSLS-II.

2010-2016 Materials Scientist, Soft/Bio Nanomaterials Group, Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY, USA. Studyied topics in stimulated self-assembly, and structural determination using x-ray scattering methods. Managed a nanoscience user program on the X9 SAXS/WAXS/GISAXS beamline at NSLS.

2006-2009 Guest Postdoctoral 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.


97. Lhermitte, J.R.; Stein, A.; Tian, C.; Zhang, Y.; Wiegart, L.; Fluerasu, A.; Gang, O.; Yager, K.G. "Coherent amplification of X-ray scattering from meso-structures" IUCrJ 2017, , ASAP. [ summarydoi ]
96. Liu, J.; Lhermitte, J.; Tian, Y.; Zhang, Z.; Yu, D.; Yager, K.G. "Healing X-ray scattering images" IUCrJ 2017, 4, 455–465. [ summarydoi ]
95. Manfrinato, V.R.; Stein, A.; Zhang, L.; Nam, C.-Y.; Yager, K.G.; Stach, E.A.; Black, C.T. "Aberration-Corrected Electron Beam Lithography at the One Nanometer Length Scale" Nano Letters 2017, ASAP, . [ summarydoi ] [ press: BNL - - IEEE Spectrum - Forbes - cover ]
94. Black, C.T.; Forrey, C.; Yager, K.G. "Thickness-dependence of block copolymer coarsening kinetics" Soft Matter 2017, 13, 3275–3283 . [ summarydoi ] [ press: cover ]
93. Rokhlenko, Y.; Majewski, P.W.; Larson, S.R.; Gopalan, P.; Yager, K.G.; Osuji, C.O. "Implications of Grain Size Variation in Magnetic Field Alignment of Block Copolymer Blends" ACS Macro Letters 2017, 6, 404–409. [ summarydoi ]
92. Wang, B.; Yager, K.G.; Yu, Dantong; Hoai, M. "X-ray Scattering Image Classification Using Deep Learning" Applications of Computer Vision (WACV) 2017, 1, 697–704. [ summarydoi ]
91. Lhermitte, J.R.; Tian, C.; Stein, A.; Rahman, A.; Zhang, Y.; Wiegart, L.; Fluerasu, A.; Gang, O.; Yager, K.G. "Robust X-ray angular correlations for the study of meso-structures" Journal of Applied Crystallography 2017, 50, 805–819. [ summarydoi ]
90. Bhaway, S.M; Qiang, Z.; Xia, Y.; Xia, X.; Lee, B.; Yager, K.G.; Zhang, L.; Kisslinger, K.; Chen, Y.-M.; Liu, K.; Zhu, Y.; Vogt, B.D. "Operando Grazing Incidence Small-Angle X-ray Scattering/X-ray Diffraction of Model Ordered Mesoporous Lithium-Ion Battery Anodes" ACS Nano 2017, 11, 1443–1454. [ summarydoi ]
89. Rahman, A.; Majewski, P.W.; Doerk, G.; Black, C.T.; Yager, K.G. "Non-native Three-dimensional Block Copolymer Morphologies " Nature Communications 2016, 7, 13988. [ summarydoi ] [ press: BNL - DoE - Newswise - TBR ]
88. Wang, B.; Guan, Z.; Yao, S.; Qin, H.; Nguyen, M.H.; Yager, K.G.; Yu, D. "Deep learning for analysing synchrotron data streams" New York Scientific Data Summit 2016, 1, 1–5. [ summarydoi ]
87. Samant, S.; Strzalka, J.; Yager, K.G.; Kisslinger, K.; Grolman, D.; Basutkar, M.; Salunke, N.; Singh, G.; Berry, B.; Karim, A. "Ordering Pathway of Block Copolymers under Dynamic Thermal Gradients Studied by in Situ GISAXS" Macromolecules 2016, 49, 8633–8642. [ summarydoi ]
86. Bai, W.; Yager, K.G.; Ross, C.A. "In situ GISAXS study of a Si-containing block copolymer under solvent vapor annealing: Effects of molecular weight and solvent vapor composition" Polymer 2016, 101, 176–183. [ summarydoi ]
85. Majewski, P.W.; Yager, K.G. "Rapid ordering of block copolymer thin films" Journal of Physics: Condensed Matter 2016, 28, 403002. [ summarydoi ]
84. Goh, T.; Huang, J.-S.; Yager, K.G.; Sfeir, M.Y.; Nam, C.-Y.; Tong, X.; Guard, L.M.; Melvin, P.R.; Antonio, F.; Bartolome, B.G.; Lee, M.L.; Hazari, N.; Taylor, A.D. "Quaternary Organic Solar Cells Enhanced by Cocrystalline Squaraines with Power Conversion Efficiencies >10%" Advanced Energy Materials 2016, 6, 1600660. [ summarydoi ]
83. Stein, A.; Wright, G.; Yager, K.G.; Doerk G.S.; Black, C.T. "Selective directed self-assembly of coexisting morphologies using block copolymer blends" Nature Communications 2016, 7, 12366. [ summarydoi ] [ press: BNL - video - DoE - Newswise ]
82. De France, K.J.; Yager, K.G.; Hoare, T.; Cranston, E.D. "Cooperative Ordering and Kinetics of Cellulose Nanocrystal Alignment in a Magnetic Field" Langmuir 2016, 32, 7564–7571. [ summarydoi ] [ press: CFN - cover ]
81. Kim, B.; Chiu, C.-Y.; Kang, S. J.; Kim, K. S.; Lee, G.-H.; Chen, Z.; Ahn, S.; Yager, K.G.; Ciston, J.; Nuckolls, C.; Schiros, T. "Vertically grown nanowire crystals of dibenzotetrathienocoronene (DBTTC) on large-area graphene" RSC Advances 2016, 6, 59582–59589. [ summarydoi ]
80. Samant, S.P.; Grabowski, C.A.; Kisslinger, K.; Yager, K.G.; Yuan, G.; Satija, S.K.; Durstock, M.F.; Raghavan, D.; Karim, A. "Directed Self-Assembly of Block Copolymers for High Breakdown Strength Polymer Film Capacitors" ACS Applied Materials & Interfaces 2016, 8, 7966–7976. [ summarydoi ]
79. Liu, W.; Tagawa, M.; Xin, H.L.; Wang, T.; Emamy, H. Li, H.; Yager, K.G.; Starr, F.W.; Tkachenko, A.V.; Gang, O. "Diamond family of nanoparticle superlattices" Science 2016, 351, 582–586. [ summarydoi ] [ press: BNL - DoE - - Science ]
78. Majewski, P.W.; Yager, K.G. "Reordering Transitions during Annealing of Block Copolymer Cylinder Phases" Soft Matter 2016, 12, 281–294. [ summarydoi ]
77. Rokhlenko, Y.; Gopinadhan, M.; Osuji, C.O.; Zhang, K.; O’Hern, C.S.; Larson, S.R.; Gopalan, P.; Majewski, P.W.; Yager, K.G. "Magnetic Alignment of Block Copolymer Microdomains by Intrinsic Chain Anisotropy" Physical Review Letters 2015, 115, 258302. [ summarydoi ] [ press: APS ]
76. Bai, W.; Yager, K.G.; Ross, C.A. "In Situ Characterization of the Self-Assembly of a Polystyrene–Polydimethylsiloxane Block Copolymer during Solvent Vapor Annealing" Macromolecules 2015, 48, 8574–8584. [ summarydoi ]
75. Smith, K.A.; Lin, Y.-H.; Mok, J.W.; Yager, K.G.; Strzalka, J.; Nie, W.; Mohite, A.D.; Verduzco, R. "Molecular Origin of Photovoltaic Performance in Donor-block-Acceptor All-Conjugated Block Copolymers" Macromolecules 2015, 48, 8346–8353. [ summarydoi ]
74. Bizien, T.;Ameline, J.-C.; Yager, K.G.; Marchi, V.; Artzner, F. "Self-Organization of Quantum Rods Induced by Lipid Membrane Corrugations" Langmuir 2015, 31, 12148–12154. [ summarydoi ]
73. Mok, J.W.; Lin, Y.-H.; Yager, K.G.; Mohite, A.D.; Nie, W.; Darling, S.B.; Lee, Y.; Gomez, E.; Gosztola, D.; Shcaller, R.D.; Verduzco, R. "Linking Group Influences Charge Separation and Recombination in All-Conjugated Block Copolymer Photovoltaics" Advanced Functional Materials 2015, 25, 5578–5585. [ summarydoi ] [ press: cover ]
72. Page, K.A.; Shin, J.W.; Eastman, S.A.; Rowe, B.W.; Kim, S.; Kusoglu, A.; Yager, K.G.; Stafford, G.R. "In Situ Method for Measuring the Mechanical Properties of Nafion Thin Films during Hydration Cycles" ACS Applied Materials & Interfaces 2015, 7, 17874–17883. [ summarydoi ]
71. Majewski, P.W.; Yager, K.G. "Latent Alignment in Pathway-Dependent Ordering of Block Copolymer Thin Films" Nano Letters 2015, 15, 5221–5228. [ summarydoi ] [ press: BNL ]
70. Majewski, P.W.; Yager, K.G. "Block Copolymer Response to Photothermal Stress Fields" Macromolecules 2015, 48, 4591–4598. [ summarydoi ]
69. Majewski, P.W.; Rahman, A.; Black, C.T.; Yager, K.G. "Arbitrary lattice symmetries via block copolymer nanomeshes" Nature Communications 2015, 6, 7448. [ summarydoi ] [ press: BNL - BNL Lecture - video ]
68. Yager, K.G.; Forrey, C.; Singh, G.; Satija, S.K.; Page, K.A.; Patton, D.L.; Douglas, J.F.; Jones, R.L.; Karim, A. "Thermally-Induced Transition of Lamellae Orientation in Block-Copolymer Films on ‘Neutral’ Nanoparticle-Coated Substrates" Soft Matter 2015, 11, 5154–5167. [ summarydoi ]
67. Lu, F.; Yager, K.G.; Zhang, Y.; Xin, H.; Gang, O. "Superlattices assembled through shape-induced directional binding" Nature Communications 2015, 6, 6912. [ summarydoi ] [ press: BNL - DoE ]
66. Majewski, P.W.; Yager, K.G. "Millisecond Ordering of Block-Copolymer Films via Photo-Thermal Gradients" ACS Nano 2015, 9, 3896–3906. [ summarydoi ] [ press: BNL ]
65. Fischer, F.S.U.; Trefz, D.; Back, J.; Kayunki, N.; Tornow, B.; Albrecht, S.; Yager, K.G.; Singh, G.; Karim, A.; Neher, D.; Brinkmann, M.; Ludwigs, S. "Highly Crystalline Films of PCPDTBT with Branched Side Chains by Solvent Vapor Crystallization: Influence on Opto-Electronic Properties" Advanced Materials 2015, 27, 1223–1228. [ summarydoi ]
64. Lu, X.; Hlaing, H.; Nam, C.-Y.; Yager, K.G.; Black, C.T.; Ocko, B.M. "Molecular Orientation and Performance of Nanoimprinted Polymer-based Blend Thin Film Solar Cells" Chemistry of Materials 2015, 27, 60–66. [ summarydoi ]
63. Weidman, M.C.; Yager, K.G.; Tisdale, W.A. "Interparticle Spacing and Structural Ordering in Superlattice PbS Nanocrystal Solids Undergoing Ligand Exchange" Chemistry of Materials 2015, 27, 474–482. [ summarydoi ] [ press: cover ]
62. Li, F.; Yager, K.G.; Dawson, N.M.; Jiang, Y.-Bi.; Malloy, K.J.; Qin, Y. "Nano-Structuring Polymer/Fullerene Composites through the Interplay of Conjugated Polymer Crystallization, Block Copolymer Self-Assembly and Complementary Hydrogen Bonding Interactions" Polymer Chemistry 2015, 6, 721–731. [ summarydoi ]
61. Cativo, H.M.; Kim, D.K.; Riggleman, R.A.; Yager, K.G.; Nonnenmann, S.S.; Chao, H.; Bonnell, D.A.; Black, C.T.; Kagan, C.R.; Park, S.-J. "Air–Liquid Interfacial Self-Assembly of Conjugated Block Copolymers into Ordered Nanowire Arrays" ACS Nano 2014, 8, 12755–12762. [ summarydoi ]
60. Bhaway, S.M.; Kisslinger, K.; Zhang, L.; Yager, K.G.; Schmitt, A.L.; Mahanthappa, M.K.; Karim, A.; Vogt, B.D. "Mesoporous Carbon–Vanadium Oxide Films by Resol-Assisted, Triblock Copolymer-Templated Cooperative Self-Assembly" ACS Applied Materials & Interfaces 2014, 6, 19288–19298. [ summarydoi ]
59. Yager, K.G.; Lai, E.; Black, C.T. "Self-Assembled Phases of Block Copolymer Blend Thin Films" ACS Nano 2014, 8, 10582–10588. [ summarydoi ]
58. Yager, K.G.; Majewski, P.W. "Metrics of graininess: robust quantification of grain count from the non-uniformity of scattering rings" Journal of Applied Crystallography 2014, 47, 1855–1865. [ summarydoi ]
57. Kim, C.-H.; Hlaing, H.; Payne, M.M.; Yager, K.G.; Bonnassieux, Y.; Horowitz, G.; Anthony, J.E.; Kymissis, I. "Strongly Correlated Alignment of Fluorinated 5,11-Bis(triethylgermylethynyl)anthradithiophene Crystallites in Solution-Processed Field-Effect Transistors" ChemPhysChem 2014, 15, 2913–2916. [ summarydoi ]
56. Li, F.; Yager, K.G.; Dawson, N.M.; Jian, Y.-B.; Malloy, K.J.; Qin, Y. "Stable and Controllable Polymer/Fullerene Composite Nanofibers through Cooperative Noncovalent Interactions for Organic Photovoltaics" Chemistry of Materials 2014, 26, 3747–3756. [ summarydoi ]
55. Smith, K.A.; Stewart, B.; Yager, K.G.; Strzalka, J.; Verduzco, R. "Control of all-conjugated block copolymer crystallization via thermal and solvent annealing" Journal of Polymer Science Part B: Polymer Physics 2014, 52, 900–906. [ summarydoi ]
54. Srivastava, S.; Nykypanchuk, D.; Fukuto, M.; Halverson, J.D.; Tkachenko, A.V.; Yager, K.G.; Gang, O. "Two-Dimensional DNA-Programmable Assembly of Nanoparticles at Liquid Interfaces" Journal of the American Chemical Society 2014, 136, 8323–8332. [ summarydoi ] [ press: BNL ]
53. Lin, Y.-H.; Yager, K.G.; Stewart, B.; Verduzco, R. "Lamellar and liquid crystal ordering in solvent-annealed all-conjugated block copolymers " Soft Matter 2014, 10, 3817–3825. [ summarydoi ]
52. Huang, H.; Yoo, S.; Kaznatcheev, K.; Yager, K.G.; Lu, F.; Yu, D.; Gang, O. Fluerasu, A.; Qin, H. "Diffusion-based Clustering Analysis of Coherent X-ray Scattering Patterns of Self-assembled Nanoparticles " Proceedings of the ACM Symposium on Applied Computing 2014, 29, 85–90. [ summarydoi ]
51. Kiapour, M.H.; Yager, K.G.; Berg, A.C.; Berg, T.L. "Materials discovery: Fine-grained classification of X-ray scattering images " Applications of Computer Vision (WACV) 2014, 1, 933–940. [ summarydoi ]
50. Zhang, X.; Yager, K.G.; Douglas, J.F.; Karim, A. "Suppression of target patterns in domain aligned cold-zone annealed block copolymer films with immobilized film-spanning nanoparticles" Soft Matter 2014, 10, 3656–3666. [ summarydoi ]
49. Krejci, A.J.; Yager, K.G.; Ruggiero, C.; Dickerson, J.H. "X-ray scattering as a liquid and solid phase probe of ordering within sub-monolayers of iron oxide nanoparticles fabricated by electrophoretic deposition" Nanoscale 2014, 6, 4047–4051. [ summarydoi ]
48. Chul-Ho Lee, C.-H.; Schiros, T.; Santos, E.J.G.; Kim, B.; Yager, K.G.;Kang, S.J.; Lee, S.; Yu, J.; Watanabe, K.; Taniguchi, T.; Hone, J.; Kaxiras, E.; Nuckolls, C.; Kim, P. "Epitaxial Growth of Molecular Crystals on van der Waals Substrates for High-Performance Organic Electronics" Advanced Materials 2014, 26, 2812–2817. [ summarydoi ]
47. 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, 8, 243–249. [ summarydoi ]
46. 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, 118–129. [ summarydoi ]
45. 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 ]
44. Li, F.; Yager, K.G.; Dawson, 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 ]
43. 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 ] [ press: BNL - BNL Lecture - video ]
42. 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 ]
41. 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 ]
40. 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 ] [ press: BNL ]
39. 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 ]
38. 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 ] [ press: BNL - cover ]
37. 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 ]
36. 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 ]
35. 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 ]
34. 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 ]
33. 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 ]
32. 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 ] [ press: BNL ]
31. 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 ]
30. 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 ]
29. Schedel, M.; Yager, K.G. "Hearing Nano-Structures: A Case Study in Timbral Sonification" International Conference on Auditory Display 2012, 18, 95–98. [ summarydoi ] [ press: SBU - Sounding Out! - NPR - PNAS ]
28. Kulkarni, M.M.; Yager, K.G.; Sharma, A.; Karim, A. "Combinatorial Block Copolymer Ordering on Tunable Rough Substrates" Macromolecules 2012, 45, 4303–4314. [ summarydoi ]
27. 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 ]
26. 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 ]
25. Schedel, M.; Fox-Gieg, 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 ]
24. 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 ] [ press: cover ]
23. 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 ]
22. 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 ]
21. 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 ]
20. 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 ]
19. 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 ]
18. 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 ]
17. 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 ]
16. 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 ]
15. 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 ]
14. 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 ]
13. 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 ] [ press: APS - cover ]
12. 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 ]
11. 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 ]
10. 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 ] [ press: cover ]
9. Yager, K.G.; Barrett, C.J. "Confinement of Surface Patterning in Azo-Polymer Thin Films" Journal of Chemical Physics 2007, 126, 094908. [ summarydoi ]
8. Yager, K.G.; Barrett, C.J. "Photomechanical Surface Patterning in Azo-Polymer Materials" Macromolecules 2006, 39, 9320. [ summarydoi ]
7. 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 ]
6. Yager, K.G.; Barrett, C.J. "Novel Photoswitching using Azobenzene Functional Materials" Journal of Photochemistry and Photobiology A: Chemistry 2006, 182, 250. [ summarydoi ]
5. 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 ]
4. 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 ]
3. 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 ]
2. Yager, K.G.; Barrett, C.J. "Temperature Modelling of Laser-Irradiated Azo Polymer Films" Journal of Chemical Physics 2004, 120, 1089–1096. [ summarydoi ]
1. 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 ]

Book Chapters

6. Kulkarni, M.M.; Karim, A.; Yager, K.G. "Directed Assembly of Block Copolymer Films: Effects of Rough Substrates and Thermal Fields" Soft Matter Gradient Surfaces, Genzer, J., ed., Wiley 2012, Chapter 10, ISBN: 978– 0470522653. [ doi ]
5. Mahimwalla, Z.; Yager, K.G.; Mamiya, J.-i.; Shishido, A.; Barrett, C.J. "Photo-Mechanical Azo Polymers for Light-Powered Actuation and Artificial Muscles" in Optical Nano and Micro Actuator Technology, Knopf, G.K. and Otani, Y., eds.CRC Press 2012, Chapter 4, ISBN: 978–1439840535.
4. Yager, K.G.; Barrett, C.J. "Amorphous Azobenzene Polymers for Light-Induced Surface Patterning" Smart Light-Responsive Materials: Azobenzene-Containing Polymers and Liquid Crystals, Zhao, Y. and Ikeda, T., eds. John Wiley and Sons 2008, Chapter 4, 978–0–470–17578–1. [ doi ]
3. Yager, K.G.; Barrett, C.J. "Azobenzene Polymers for Photonic Applications" Smart Light-Responsive Materials: Azobenzene-Containing Polymers and Liquid Crystals, Zhao, Y. and Ikeda, T., eds. John Wiley and Sons 2008, Chapter 1, ISBN: 978–0–470–17578–1. [ doi ]
2. Yager, K.G.; Barrett, C.J. "Azobenzene Polymers as Photo-Mechanical and Multifunctional Smart Materials" Intelligent Materials, Shahinpoor, M. and Schneider, H.-J., eds. Royal Society of Chemistry Publishing 2008, Chapter 17, ISBN: 978–085404–335–4. [ doi ]
1. Yager, K.G.; Barrett, C.J. "Light-Induced Nanostructure Formation using Azobenzene Polymers" Polymeric Nanostructures and their Applications, Nalwa, H.S., ed. American Scientific Publishers 2006, Chapter 8, ISBN: 1–58883–068–3.


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.


Kevin G. Yager
Group Leader
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