Aqueous suspensions of single-wall carbon nanotubes: Degree of aggregation into bundles and optical properties

被引：9

作者：

Venediktova, A. V. ^{[1
,2
]}

Bocharov, V. N. ^{[1
]}

Vlasov, A. Yu. ^{[1
,2
]}

Kislyakov, I. M. ^{[2
,3
]}

Kiselev, V. M. ^{[3
]}

Kats, E. A. ^{[4
]}

Obraztsova, E. D. ^{[5
]}

Pozharov, A. S. ^{[5
]}

Povarov, S. A. ^{[2
]}

机构：

[1] St Petersburg State Univ, St Petersburg 198504, Russia

[2] St Petersburg Natl Res Univ Informat Technol Mech, St Petersburg 197101, Russia

[3] SI Vavilov State Opt Inst, St Petersburg 199034, Russia

[4] Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, IL-84990 Sede Boqer, Israel

[5] Russian Acad Sci, Prokhorov Gen Phys Inst, Moscow 119991, Russia

来源：

OPTICS AND SPECTROSCOPY | 2014年 / 116卷 / 03期

基金：

俄罗斯基础研究基金会;

关键词：

PHOTOLUMINESCENCE; TEMPERATURE;

D O I：

10.1134/S0030400X14030230

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Aqueous suspensions of nanotubes, as well as the structure and optical properties of their aggregates (bundles), are studied by spectroscopy and high-resolution electron microscopy. The structure of nanoparticles is controlled by varying the ultrasonication time during preparation of suspensions. It is found that the defectiveness of nanotubes increases with decreasing bundle size. A correlation is shown to take place between the suspension preparation regime, the structure of nanoparticles, and the relaxation of the photoexcitation energy of their electronic shells. It is found that the efficiency of photoexcitation energy conversion into heat increases with increasing degree of aggregation of nanotubes into bundles.

引用

页码：418 / 423

页数：6

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