Giant thermopower effects from molecular physisorption on carbon nanotubes

被引：103

作者：

Sumanasekera, GU ^{[1
]}

Pradhan, BK ^{[1
]}

Romero, HE ^{[1
]}

Adu, KW ^{[1
]}

Eklund, PC ^{[1
]}

机构：

[1] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 16期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.89.166801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Results are presented of in situ studies of the thermoelectric power and four-probe resistance of single-walled carbon nanotube films during the adsorption of cyclic hydrocarbons C6H2n (n=3-6). The size of the change in these transport parameters is found to be related to the pi electron population of the molecule, suggesting the coupling between these pi electrons and those in the nanotube wall may be responsible for the observed effects. A transport model for the SWNT film behavior is presented, incorporating the effects of a new scattering channel associated with the adsorbed molecules.

引用

页数：4

共 15 条

[1] Carbon nanotubes: A thermoelectric nano-nose [J].

Adu, CKW ;

Sumanasekera, GU ;

Pradhan, BK ;

Romero, HE ;

Eklund, PC .

CHEMICAL PHYSICS LETTERS, 2001, 337 (1-3) :31-35

[2]

Barnard R. D., 1972, THERMOELECTRICITY ME

[3] Is the intrinsic thermoelectric power of carbon nanotubes positive? [J].

Bradley, K ;

Jhi, SH ;

Collins, PG ;

Hone, J ;

Cohen, ML ;

Louie, SG ;

Zettl, A .

PHYSICAL REVIEW LETTERS, 2000, 85 (20) :4361-4364

[4] Extreme oxygen sensitivity of electronic properties of carbon nanotubes [J].

Collins, PG ;

Bradley, K ;

Ishigami, M ;

Zettl, A .

SCIENCE, 2000, 287 (5459) :1801-1804

[5]

*CRC, 1996, CRC HDB CHEM PHYS

[6] THERMOELECTRIC-POWER MEASUREMENTS USING ANALOG SUBTRACTION [J].

EKLUND, PC ;

MABATAH, AK .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1977, 48 (07) :775-777

[7]

ELKINGTON PA, 1969, J PHYS CHEM-US, V73, P321

[8] Electronic properties of oxidized carbon nanotubes [J].

Jhi, SH ;

Louie, SG ;

Cohen, ML .

PHYSICAL REVIEW LETTERS, 2000, 85 (08) :1710-1713

[9]

KALASHNIKOVA EV, 1971, CHROMATOGRAPHIA, V4, P495

[10]

Kittel C., 1996, INTRO SOLID STATE PH, V7, P389

← 1 2 →