Kristie J Koski

The Koski group is a low-dimensional materials group. We are developing the basic science needed to translate the extraordinary properties of two-dimensional materials into real-world applications. We pursue a fully integrated research program spanning the gamut from solid-state synthesis to fundamental condensed matter physics to applied performance.

Education, Awards and Professional Highlights

• Nano Research Young Innovator Award (2019)
• JPhys50 (2017)
• Appointed to UC Davis faculty (2016)
• NSF CAREER Award (2015)
• Assistant Professor, Brown University (2013-2016)
• Postdoctoral Associate, Stanford University (2010-2013)
• Postdoctoral Associate, Arizona State University (2009)
• Ph.D. University of California Berkeley (2008)

Representative Publications

• B.W. Reed, C. Tran, K.J. Koski, Brillouin scattering of zero-valent Au-, Cu-, Ag-intercalated hexagonal boron nitride. Physical Review Materials 7  044003 (2023).
• A. Twitto, C. Stern, M. Poplinger, I. Perelshtein, S. Saha, A. Jain, K. J. Koski, F. L. Deepak, A. Ramasubramaniam, and D. Naveh, Copper migration and surface oxidation of CuxBi2Se3 in ambient pressure environments. Journal of Physics: Materials  5  044005 (2022).
• A. L. Gross, L. Falling, M. C. Staab, M. I. Montero, R. R. Ullah, D. M. Nisson, P. Klavins, K. J. Koski, N. J. Curro, V. Taufour, S. Nemsak, and I. M. Vishik, Optoelectronics of Atomic Metal–Semiconductor Interfaces in Tin-Intercalated MoS2. ACS Nano 16  17086 (2022).
• M. Wiesner, K. Koski, A. Laitinen, J. Manninen, A. A. Zyuzin, P. Hakonen, Electron-phonon coupling in copper intercalated Bi2Se3. Scientific Reports 12 12097 (2022).
• D. Vong, M. Makena, G. Tucker, S. Gurses, T. Nematiaram, D. Radhakrishnan, L. Daemen, J. Anthony, K.J. Koski, A. Troisi, C. Kronawitter, A. Moule, Quantitative Hole Mobility Simulation and Validation in Substituted Acenes J. Phys. Chem. Lett. 13, 5530-5537 (2022).
• B.W. Reed and K.J. Koski Acoustic Phonons and Elastic Stiffnesses from Brillouin Scattering of CdPS3. J. Appl. Phys. 131, 165109 (2022).
• C. Stern, A. Twitto, R.Z. Snitkoff, Y. Fleger, S. Saha, L. Boddapati, A. Jain, M. Wang, K.J. Koski, F.L. Deepak, A. Ramasubramaniam, and D. Naveh, Enhancing Light–Matter Interactions in MoS2 by Copper Intercalation, Adv. Mater., 2021 2008779 (2021).
• D. Radhakrishnan, M. Wang, K. J. Koski, Correlation between color and elasticity in Anomia ephippium shells: Biological design to enhance the mechanical properties, ACS Applied Bio Materials, 3 9012-9018 (2020).
• S. Chen, V.L. Johnson, D. Donadio, K.J. Koski, Mn-Intercalated MoSe2 under pressure: electronic structure and vibrational characterization of a dilute magnetic semiconductor. Journal of Chemical Physics, 153, 124701 (2020)
• B.W. Reed, V. Huynh, C. Tran, and K.J. Koski, Brillouin scattering of V2O5 and Sn-intercalated V2O5. Physical Review B 102, 054109 (2020) 
• D. Kwak, H. Sokol, B.P. Moser, H. Ryu, K.J. Koski, R. Maric, L. Zhang, Y. Lei, Ultrasensitive ammonia (NH3) gas sensor: DFT Simulation-Directed Selection of High-Performance Metal-Doped Molybdenum Tri-oxide (α-MoO3) Nanoribbons for NH3 Detection. IEEE Sensors , 1-4, (2019)
• B.W. Reed, D.R. Williams, B.P. Moser, and K.J. Koski, Chemically tuning quantized acoustic phonons in 2D layered MoO3 nanoribbons. Nano Letters 19, 4406-4412 (2019)
• V.L. Johnson, A. Anilao, K.J. Koski, Pressure-dependent phase transition of 2D layered silicon telluride (Si2Te3) and manganese intercalated silicon telluride. Nano Research 12, 2373-2377 (2019)
• D. Kwak, M. Wang, K.J. Koski, L. Zhang, H. Sokol, R. Maric, Y. Lei, Molybdenum Trioxide (α-MoO3) Nanoribbons for Ultrasensitive Ammonia (NH3) Gas Detection: Integrated Experimental and Density Functional Theory Simulation Studies. ACS Applied Materials & Interfaces. 11, 10697-10706 (2019)
• D.R. Williams, D. Nurco, N. Rahbar, K. J. Koski, Elasticity of Bamboo Fiber Variants from Brillouin Spectroscopy. Materialia 100240 (2019)
• E.P. Grey, C.L. Browning, M. Wang, K.D. Gion, E.Y. Chao, K.J. Koski, A.B. Kane, R.H Hurt. Biodissolution and cellular response to MoO3 nanoribbons and a new framework for early hazard screening for 2D materials. Environmental Science: Nano DOI: 10.1039/C8EN00362A (2018)
• Z. Lin, Y. Lei, S. Subramanian, N. Briggs, Y. Wang, C.-L. Lo, E. Yalon, D. Lloyd, S. Wu, K. Koski, R. Clark, S. Das, R. M. Wallace, T. Kuech, J.S. Bunch, X. Li, Z, Chen, E. Pop, V. H. Crespi, J.A. Robinson, M. Terrones. Research Update: Recent progress on 2D materials beyond graphene: From ripples, defects, intercalation, and valley dynamics to straintronics and power dissipation. APL Materials 6, 080701 (2018)
• M. Wang, D. Williams, G. Lahti, S. Teshima, D. Dominguez-Aguilar, K. J. Koski, Chemical intercalation of heavy metal, semimetal, and semiconductor atoms into 2D layered chalcogenides. 2D Materials, 5, 045005 (2018)
• M. Wang, G. Lahti, D. Williams, K.J. Koski, Chemically tunable full spectrum optical properties of 2D silicon telluride nanoplates. ACS Nano, 12 6163-6169 (2018)
• K. Kushnir, M. Wang, P. D. Fitzerald, K. J. Koski, and L. V. Titova, Ultrafast zero-bias photocurrent in GeS nanosheets: Promise for photovoltaics. ACS Energy Letters, 2, 1429-1434  (2017).
• Y. Zhang, D. R. Manke, S. Sharifzadeh, A. L. Briseno, A. Ramasubramaniam, and K. J. Koski, The elastic constants of rubrene determined by Brillouin scatteirng and density functional theory. Appl. Phys. Lett. 110, 071903 (2017).
• M. Wang, I. Al-Dhahir, J. Appiah, and K. J. Koski, Deintercalation of zero-valent metals from 2D layered chalcogenides. Chem. Mater. 29, 1650-1655 (2017).
• M. Wang and K. J. Koski, Polytypic phase transitions in metal-intercalated Bi2Se3. J. Phys.: Condens. Matter. 28, 494002 (2016).
• Z. Wang, W. Zhu, Y Qiu, X. Yi, A. van dem Busche, A. Kane, H. Gao, K.J. Koski, R. Hurt, Biological and environmental interaction of emerging two-dimensional nanomaterials. Chem. Soc. Rev. 45, 1750-1780 (2016).
• Y. Zhang, B.W. Reed, F.R. Chung, K.J. Koski, Mesoscale elastic properties of marine sponge spicules. J. Struct. Biol. 193, 67-74 (2016).
• Z. Wang, W. Zhu, Y Qiu, X. Yi, A. van dem Busche, A. Kane, H. Gao, K.J. Koski, R. Hurt, Biological and environmental interaction of emerging two-dimensional nanomaterials. Chem. Soc. Rev. 45, 1750-1780 (2016).
• K.P. Chen, F.R. Chung, M. Wang, K.J. Koski, Dual Element Intercalation into 2D Layered Bi2Se3 Nanoribbons. J. Am. Chem. Soc. 137, 5431-5437 (2015).
• S. Keuleyan, M. Wang, F.R. Chung, J. Commons, K.J. Koski, A Silicon-Based Two-Dimensional Chalcogenide: Growth of Si2Te3 Nanoribbons and Nanoplates. Nano Lett. 15, 2285-2290 (2015).
• M. Wang and K.J. Koski, Reversible Chemochromic MoO3 Nanoribbons through Zero-valent Metal Intercalation. ACS Nano 9, 3226-3233 (2015).
• B.W. Reed, F.R. Chung, M. Wang, T. LaGrange, and K.J. Koski, Disorder-Order transition in 2D copper-intercalated MoO3 using dynamic transmission electron microscopy. 2D Mater. 1 035001 (2014).