Density of states evaluation of an insulating polymer by high-sensitivity ultraviolet photoemission spectroscopy
Although the contact electrification of insulating polymers has been widely used in various technologies, the mechanism of electrification is still not well understood and several models have been proposed to explain the mechanism. Some of the models assume the existence of bandgap states that can s...
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| Veröffentlicht in: | Applied physics letters 2017-03, Vol.110 (11) |
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| container_title | Applied physics letters |
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| creator | Sato, T. Koswattage, K. R. Nakayama, Y. Ishii, H. |
| description | Although the contact electrification of insulating polymers has been widely used in various technologies, the mechanism of electrification is still not well understood and several models have been proposed to explain the mechanism. Some of the models assume the existence of bandgap states that can store or release electrons to charge the polymer; however, the density of states in the bandgap region is not well examined. In this study, an approach to directly measure the density of state of insulating polymers using hν-dependent high-sensitivity ultraviolet photoemission spectroscopy is proposed. Demonstration of the approach to a representative insulating polymer, nylon-6,6, is reported with the estimation of the charge density and charge penetration depth as a function of the work function difference. |
| doi_str_mv | 10.1063/1.4978529 |
| format | Article |
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R. ; Nakayama, Y. ; Ishii, H.</creator><creatorcontrib>Sato, T. ; Koswattage, K. R. ; Nakayama, Y. ; Ishii, H.</creatorcontrib><description>Although the contact electrification of insulating polymers has been widely used in various technologies, the mechanism of electrification is still not well understood and several models have been proposed to explain the mechanism. Some of the models assume the existence of bandgap states that can store or release electrons to charge the polymer; however, the density of states in the bandgap region is not well examined. In this study, an approach to directly measure the density of state of insulating polymers using hν-dependent high-sensitivity ultraviolet photoemission spectroscopy is proposed. 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R.</creatorcontrib><creatorcontrib>Nakayama, Y.</creatorcontrib><creatorcontrib>Ishii, H.</creatorcontrib><title>Density of states evaluation of an insulating polymer by high-sensitivity ultraviolet photoemission spectroscopy</title><title>Applied physics letters</title><description>Although the contact electrification of insulating polymers has been widely used in various technologies, the mechanism of electrification is still not well understood and several models have been proposed to explain the mechanism. Some of the models assume the existence of bandgap states that can store or release electrons to charge the polymer; however, the density of states in the bandgap region is not well examined. In this study, an approach to directly measure the density of state of insulating polymers using hν-dependent high-sensitivity ultraviolet photoemission spectroscopy is proposed. Demonstration of the approach to a representative insulating polymer, nylon-6,6, is reported with the estimation of the charge density and charge penetration depth as a function of the work function difference.</description><subject>Applied physics</subject><subject>Charge density</subject><subject>Density of states</subject><subject>Electrification</subject><subject>Energy gap</subject><subject>Penetration depth</subject><subject>Photoelectric emission</subject><subject>Photoelectron spectroscopy</subject><subject>Polymers</subject><subject>Sensitivity analysis</subject><subject>Spectrum analysis</subject><subject>Ultraviolet spectroscopy</subject><issn>0003-6951</issn><issn>1077-3118</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNqdkN1LwzAUxYMoOKcP_gcBnxQ689E0zaPMTxj4os8hbZMto2tikg7639tuA999utzD7557OADcYrTAqKCPeJELXjIizsAMI84zinF5DmYIIZoVguFLcBXjdlwZoXQG_LPuok0DdAbGpJKOUO9V26tkXTeJqoO2i307Ct0aetcOOx1gNcCNXW-yeLi2-8mhb1NQe-tanaDfuOT0zsY42USv6xRcrJ0frsGFUW3UN6c5B9-vL1_L92z1-faxfFplNRU0ZYQZ0RRIMYJ5QwUz3GhcaC0qXlelqYgxDcO5FmXNhOEIK56rhrDCIF02haZzcHf09cH99DomuXV96MaXkmCSM5qLgo7U_ZGqx3gxaCN9sDsVBomRnAqVWJ4KHdmHIxtrmw79_A_eu_AHSt8Y-gsGv4fH</recordid><startdate>20170313</startdate><enddate>20170313</enddate><creator>Sato, T.</creator><creator>Koswattage, K. R.</creator><creator>Nakayama, Y.</creator><creator>Ishii, H.</creator><general>American Institute of Physics</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>H8D</scope><scope>L7M</scope></search><sort><creationdate>20170313</creationdate><title>Density of states evaluation of an insulating polymer by high-sensitivity ultraviolet photoemission spectroscopy</title><author>Sato, T. ; Koswattage, K. R. ; Nakayama, Y. ; Ishii, H.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c393t-25f9d60a5217d395f7fe16ee9b7cb8fb2ffd514e98c59f701a74ad256f0e8d6e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Applied physics</topic><topic>Charge density</topic><topic>Density of states</topic><topic>Electrification</topic><topic>Energy gap</topic><topic>Penetration depth</topic><topic>Photoelectric emission</topic><topic>Photoelectron spectroscopy</topic><topic>Polymers</topic><topic>Sensitivity analysis</topic><topic>Spectrum analysis</topic><topic>Ultraviolet spectroscopy</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sato, T.</creatorcontrib><creatorcontrib>Koswattage, K. 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In this study, an approach to directly measure the density of state of insulating polymers using hν-dependent high-sensitivity ultraviolet photoemission spectroscopy is proposed. Demonstration of the approach to a representative insulating polymer, nylon-6,6, is reported with the estimation of the charge density and charge penetration depth as a function of the work function difference.</abstract><cop>Melville</cop><pub>American Institute of Physics</pub><doi>10.1063/1.4978529</doi><tpages>4</tpages></addata></record> |
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| ispartof | Applied physics letters, 2017-03, Vol.110 (11) |
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| language | eng |
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| source | AIP Journals Complete; Alma/SFX Local Collection |
| subjects | Applied physics Charge density Density of states Electrification Energy gap Penetration depth Photoelectric emission Photoelectron spectroscopy Polymers Sensitivity analysis Spectrum analysis Ultraviolet spectroscopy |
| title | Density of states evaluation of an insulating polymer by high-sensitivity ultraviolet photoemission spectroscopy |
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