Gap States of a Polyethylene Model Oligomer Observed by Using High-Sensitivity Ultraviolet Photoelectron Spectroscopy

Yuki YAMAGUCHI; Kohei SHIMIZU; Atsushi MATSUZAKI; Daisuke SANO; Tomoya SATO; Yuya TANAKA; Hisao ISHII

doi:10.1587/transele.2018OMS0008

Special Section on Recent Progress in Organic Molecular Electronics and Biotechnology

Gap States of a Polyethylene Model Oligomer Observed by Using High-Sensitivity Ultraviolet Photoelectron Spectroscopy

Yuki YAMAGUCHI, Kohei SHIMIZU, Atsushi MATSUZAKI, Daisuke SANO, Tomoya SATO, Yuya TANAKA, Hisao ISHII

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Keywords: polyethylene oligomer, C₄₄H₉₀, gap states, triboelectricity, photoemission spectroscopy

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2019 Volume E102.C Issue 2 Pages 168-171

DOI https://doi.org/10.1587/transele.2018OMS0008

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Abstract

The gap states of tetratetracontane (C₄₄H₉₀; TTC), which is a model oligomer of polyethylene, was examined by using high-sensitivity UV photoemission spectroscopy (HS-UPS). The high sensitivity enabled us to directly observe the weak gap states distributed in the HOMO-LUMO gap from the valence band top to 3.0 eV below the vacuum level. On the basis of the density-of-states derived from UPS results, the tribocharging nature of polyethylene was discussed in comparison with our previous result for nylon-6,6 film.

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