Ultrafast dynamics of electron localization and solvation in ice layers on Cu(111)

被引：119

作者：

Gahl, C ^{[1
]}

Bovensiepen, U ^{[1
]}

Frischkorn, C ^{[1
]}

Wolf, M ^{[1
]}

机构：

[1] Free Univ Berlin, Fachbereich Phys, D-14195 Berlin, Germany

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.89.107402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The femtosecond dynamics of localization and solvation of photoinjected electrons in ultrathin layers of amorphous solid H2O and D2O have been studied by time- and angle-resolved two-photon-photoelectron spectroscopy. After electron transfer from the metal substrate into the conduction band of ice, the excess electron localizes within the first 100 fs in a state at 2.9 eV above E-F, which is further stabilized by 300 meV on a time scale of 0.5-1 ps due to molecular rearrangements in the adlayer. A pronounced change of the solvation dynamics at a coverage of similar to2 bilayers is attributed to different rigidity of the solvation shell in the bulk and near the surface of ice.

引用

页码：107402 / 107402

页数：4

共 23 条

[1] Photoinduced crystallization of amorphous ice films on graphite [J].

Chakarov, D ;

Kasemo, B .

PHYSICAL REVIEW LETTERS, 1998, 81 (23) :5181-5184

[2] Ultrafast librational dynamics of the hydrated electron [J].

Emde, MF ;

Baltuska, A ;

Kummrow, A ;

Pshenichnikov, MS ;

Wiersma, DA .

PHYSICAL REVIEW LETTERS, 1998, 80 (21) :4645-4648

[3]

GAHL C, IN PRESS SURF SCI

[4]

GAHL C, IN PRESS

[5] Femtosecond dynamics of electron localization at interfaces [J].

Ge, NH ;

Wong, CM ;

Lingle, RL ;

McNeill, JD ;

Gaffney, KJ ;

Harris, CB .

SCIENCE, 1998, 279 (5348) :202-205

[6]

Gillis HA, 2001, CAN J CHEM, V79, P80

[7] ISOTOPE EFFECTS IN STRUCTURE AND KINETICS OF WATER ADSORBATES ON RU(001) [J].

HELD, G ;

MENZEL, D .

SURFACE SCIENCE, 1995, 327 (03) :301-320

[8] The interaction of water with solid surfaces: fundamental aspects revisited [J].

Henderson, MA .

SURFACE SCIENCE REPORTS, 2002, 46 (1-8) :1-308

[9] A unified electron transfer model for the different precursors and excited states of the hydrated electron [J].

Kee, TW ;

Son, DH ;

Kambhampati, P ;

Barbara, PF .

JOURNAL OF PHYSICAL CHEMISTRY A, 2001, 105 (37) :8434-8439

[10] SOLVATED ELECTRON-STRUCTURE IN GLASSY MATRICES [J].

KEVAN, L .

ACCOUNTS OF CHEMICAL RESEARCH, 1981, 14 (05) :138-145

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