VALENCE BANDS OF POLY(METHYLMETHACRYLATE) AND PHOTOION EMISSION IN VACUUM ULTRAVIOLET REGION

被引：23

作者：

UENO, N

KOBAYASHI, Y

SEKIGUCHI, T

IKEURA, H

SUGITA, K

HONMA, K

TANAKA, K

ORTI, E

VIRUELA, R

机构：

[1] CHIBA UNIV, FAC ENGN, DEPT IMAGE SCI & TECHNOL, INAGE KU, CHIBA 263, JAPAN

[2] UNIV TOKYO, FAC SCI, DEPT CHEM, TOKYO 113, JAPAN

[3] TOKYO INST TECHNOL, FAC SCI, DEPT CHEM, TOKYO 152, JAPAN

[4] HIMEJI INST TECHNOL, FAC SCI, DEPT CHEM, AKOH 67812, JAPAN

[5] NATL LAB HIGH ENERGY PHYS, PHOTON FACTORY, TSUKUBA, IBARAKI 305, JAPAN

[6] UNIV VALENCIA, FAC CIENCIES QUIM, DEPT QUIM FIS, E-46100 BURJASSOT, SPAIN

来源：

JOURNAL OF APPLIED PHYSICS | 1992年 / 72卷 / 11期

关键词：

D O I：

10.1063/1.351983

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Photoion and photoelectron yields were measured for poly(methylmethacrylate) in the photon energy region of 8-40 eV using synchrotron radiation. Further, the valence-band structure was investigated with ultraviolet photoelectron spectra and valence effective Hamiltonian calculations. A significant difference was observed between the photon energy dependencies of photoion and photoelectron yields. The threshold energy for photoion emission was found to be 10.5 eV, while that for photoelectron emission was 8.5 eV, indicating holes created near the valence-band top do not contribute to the ion emission. At the higher-energy region, the ion emission efficiency was found to be enhanced m the photon energy region of 17-28 eV. The difference between the threshold energies of photoion and photoelectron emission and the enhancement of the photoion emission are discussed in conjunction with the valence-band structure.

引用

页码：5423 / 5428

页数：6

共 33 条

[1] A Nonempirical Model Potential Technique for Calculations of Band Structures of Polymers [J].

Andre, J. M. ;

Burke, L. A. ;

Delhalle, J. ;

Nicolas, G. ;

Durand, Ph. .

INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY, 1979, 16 :283-291

[2] A NON-EMPIRICAL EFFECTIVE HAMILTONIAN TECHNIQUE FOR POLYMERS - APPLICATION TO POLYACETYLENE AND POLYDIACETYLENE [J].

BREDAS, JL ;

CHANCE, RR ;

SILBEY, R ;

NICOLAS, G ;

DURAND, P .

JOURNAL OF CHEMICAL PHYSICS, 1981, 75 (01) :255-267

[3] ELECTRONIC-STRUCTURE EVOLUTION UPON THERMAL-TREATMENT OF POLYACRYLONITRILE - A THEORETICAL INVESTIGATION [J].

BREDAS, JL ;

SALANECK, WR .

JOURNAL OF CHEMICAL PHYSICS, 1986, 85 (04) :2219-2226

[4] VALENCE EFFECTIVE HAMILTONIAN STUDY OF THE ELECTRONIC-STRUCTURE OF POLY(PARA-PHENYLENE) AND POLY(PARA-PHENYLENE SULFIDE) [J].

BREDAS, JL ;

CHANCE, RR ;

SILBEY, R ;

NICOLAS, G ;

DURAND, P .

JOURNAL OF CHEMICAL PHYSICS, 1982, 77 (01) :371-378

[5] METAL PHOTOCATHODES AS SECONDARY STANDARDS FOR ABSOLUTE INTENSITY MEASUREMENTS IN VACUUM ULTRAVIOLET [J].

CAIRNS, RB ;

SAMSON, JAR .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA, 1966, 56 (11) :1568-&

[6]

Carlson T. A., 1983, Desorption Induced by Electronic Transitions DIET I. Proceedings of the First International Workshop, P169

[7] ULTRAVIOLET PHOTOELECTRON-SPECTRA OF ALPHA-POLYMORPHS AND BETA-POLYMORPHS OF COPPER PHTHALOCYANINE [J].

CHEN, SX ;

SEKI, K ;

INOKUCHI, H ;

SHI, Z ;

QIAN, RY .

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1983, 56 (09) :2565-2568

[8] DEGRADATION OF POLY(METHYLMETHACRYLATE) BY DEEP ULTRAVIOLET, X-RAY, ELECTRON-BEAM, AND PROTON-BEAM IRRADIATIONS [J].

CHOI, JO ;

MOORE, JA ;

CORELLI, JC ;

SILVERMAN, JP ;

BAKHRU, H .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 1988, 6 (06) :2286-2289

[9] PHOTOEMISSION-STUDY OF THE COPPER POLY(ETHYLENE-TEREPHTHALATE) INTERFACE [J].

CHTAIB, M ;

GHIJSEN, J ;

PIREAUX, JJ ;

CAUDANO, R ;

JOHNSON, RL ;

ORTI, E ;

BREDAS, JL .

PHYSICAL REVIEW B, 1991, 44 (19) :10815-10825

[10] COMPUTATION OF ELECTRONIC DENSITY OF STATES DISTRIBUTIONS OF STEREOREGULAR POLYMERS [J].

DELHALLE, J ;

DELHALLE, S .

INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY, 1977, 11 (02) :349-358

← 1 2 3 4 →