Brownian Motion of Graphene

被引：177

作者：

Marago, Onofrio M. ^{[1
]}

Bonaccorso, Francesco ^{[2
]}

Saija, Rosalba ^{[3
]}

Privitera, Giulia ^{[2
]}

Gucciardi, Pietro G. ^{[1
]}

Iati, Maria Antonia ^{[1
]}

Calogero, Giuseppe ^{[1
]}

Jones, Philip H. ^{[4
]}

Borghese, Ferdinando ^{[3
]}

Denti, Paolo ^{[3
]}

Nicolosi, Valeria ^{[5
]}

Ferrari, Andrea C. ^{[2
]}

机构：

[1] CNR Ist & Proc Chim Fis, I-98158 Messina, Italy

[2] Univ Cambridge, Dept Engn, Cambridge CB3 0FA, England

[3] Univ Messina, Dipartimento Fis Materia & Ingn Elettron, Messina, Italy

[4] UCL, Dept Phys & Astron, London WC1E 6BT, England

[5] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

来源：

ACS NANO | 2010年 / 4卷 / 12期

基金：

英国工程与自然科学研究理事会;

关键词：

Brownian motion; optical tweezers; graphene; electromagnetic scattering theory; RAMAN-SPECTROSCOPY; CARBON NANOTUBES; OPTICAL TWEEZERS; EXFOLIATION; PARTICLES; PHOTONICS;

D O I：

10.1021/nn1018126

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Brownian motion is a manifestation of the fluctuation-dissipation theorem of statistical mechanics. It regulates systems in physics, biology, chemistry, and finance. We use graphene as prototype material to unravel the consequences of the fluctuation-dissipation theorem in two dimensions, by studying the Brownian motion of optically trapped graphene flakes. These orient orthogonal to the light polarization, due to the optical constants anisotropy. We explain the flake dynamics in the optical trap and measure force and torque constants from the correlation functions of the tracking signals, as well as comparing experiments with a full electromagnetic theory of optical Yapping. The understanding of optical trapping of two-dimensional nanostructures gained through our Brownian motion analysis paves the way to light-controlled manipulation and all-optical sorting of biological membranes and anisotropic macromolecules.

引用

页码：7515 / 7523

页数：9

共 56 条

[1]

[Anonymous], 2004, Equilibrium and nonequilibrium statistical thermodynamics

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