Electron beam-induced electrostatic charging causes spectral changes of an 
insulating electrochromic material

Rhinow, Daniel; Hampp, Norbert

doi:10.1063/5.0022695

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Electron beam-induced electrostatic charging causes spectral changes of an insulating electrochromic material

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Rhinow, Daniel
Department of Structural Biology, Max Planck Institute of Biophysics, Max Planck Society;
Philipps-Universität Marburg, Marburg, Germany;

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Citation

Rhinow, D., & Hampp, N. (2020). Electron beam-induced electrostatic charging causes spectral changes of an insulating electrochromic material. Applied Physics Letters, 117(8): 083701. doi:10.1063/5.0022695.

Cite as: https://hdl.handle.net/21.11116/0000-0007-1060-A

Abstract

Electrostatic charging of electrically insulating samples upon electron irradiation plays a large role in the analysis and processing of materials in biosciences and the semiconductor industry. We have analyzed spectral changes of purple membranes (PMs) containing bacteriorhodopsin, an electrochromic biological material, upon irradiation with electrons at an acceleration voltage of 30kV. We observed a bathochromic shift in the UV/VIS spectrum of PM films, due to internal electric fields generated by charges injected into the films. The experiments demonstrate that spectroscopic changes, accompanying electron beam-induced charge injection into electrochromic materials, enable quantitative analysis of electrostatic charging of insulators upon electron irradiation by optical spectroscopy.