Kamila Thompson

All Publications

• Native Point Defects Controlling Piezoelectric Voltage in Strained ZnO Microwires ACS OMEGA Duddella, K., Thompson, K., Haseman, M., Brillson, L. J. 2024

  View details for DOI 10.1021/acsomega.4c07595

  View details for Web of Science ID 001380397100001

• Biaxial Tensile Strain Enhances Electron Mobility of Monolayer Transition Metal Dichalcogenides. ACS nano Yang, J. A., Bennett, R. K., Hoang, L., Zhang, Z., Thompson, K. J., Michail, A., Parthenios, J., Papagelis, K., Mannix, A. J., Pop, E. 2024

  Abstract

  Strain engineering can modulate the properties of two-dimensional (2D) semiconductors for electronic and optoelectronic applications. Recent theory and experiments have found that uniaxial tensile strain can improve the electron mobility of monolayer MoS2, a 2D semiconductor, but the effects of biaxial strain on charge transport are not well characterized in 2D semiconductors. Here, we use biaxial tensile strain on flexible substrates to probe electron transport in monolayer WS2 and MoS2 transistors. This approach experimentally achieves 2* higher on-state current and mobility with 0.3% applied biaxial strain in WS2, the highest mobility improvement at the lowest strain reported to date. We also examine the mechanisms behind this improvement through density functional theory simulations, concluding that the enhancement is primarily due to reduced intervalley electron-phonon scattering. These results underscore the role of strain engineering in 2D semiconductors for flexible electronics, sensors, integrated circuits, and other optoelectronic applications.

  View details for DOI 10.1021/acsnano.3c08996

  View details for PubMedID 38921699

• Role of Thin Film Adhesion on Capillary Peeling. Nano letters Ma, J., Kim, J. M., Hoque, M. J., Thompson, K. J., Nam, S., Cahill, D. G., Miljkovic, N. 2021; 21 (23): 9983-9989

  Abstract

  The capillary force can peel off a substrate-attached film if the adhesion energy (Gw) is low. Capillary peeling has been used as a convenient, rapid, and nondestructive method for fabricating free-standing thin films. However, the critical value of Gw, which leads to the transition between peeling and sticking, remains largely unknown. As a result, capillary peeling remains empirical and applicable to a limited set of materials. Here, we investigate the critical value of Gw and experimentally show the critical adhesion (Gw,c) to scale with the water-film interfacial energy (≈0.7γfw), which corresponds well with our theoretical prediction of Gw,c = γfw. Based on the critical adhesion, we propose quantitative thermodynamic guidelines for designing thin film interfaces that enable successful capillary peeling. The outcomes of this work present a powerful technique for thin film transfer and advanced nanofabrication in flexible photovoltaics, battery materials, biosensing, translational medicine, and stretchable bioelectronics.

  View details for DOI 10.1021/acs.nanolett.1c03494

  View details for PubMedID 34788056