NANOSYSTEMS: PHYSICS, CHEMISTRY, MATHEMATICS, 2018, 9 (1), P. 14–16
Thermal-lens spectrometer for studying thermophysical properties of fullerenes
I.V. Mikheev – Chemistry Department, Lomonosov Moscow State University, Moscow; Analytical Centre of Lomonosov Moscow State University / Agilent Technologies Authorized Partner Laboratory, Moscow, Russia; mikheev.ivan@gmail.com
L. O. Usoltseva – Chemistry Department, Lomonosov Moscow State University, Moscow; Analytical Centre of Lomonosov Moscow State University / Agilent Technologies Authorized Partner Laboratory, Moscow, Russia; usoltsevalilya@gmail.com
D. A. Ivshukov – Chemistry Department, Lomonosov Moscow State University, Moscow, Russia; dima._iv@mail.ru
D. S. Volkov – Chemistry Department, Lomonosov Moscow State University, Moscow; Analytical Centre of Lomonosov Moscow State University / Agilent Technologies Authorized Partner Laboratory, Moscow, Russia; dmsvolkov@gmail.com
M.V. Korobov – Chemistry Department, Lomonosov Moscow State University, Moscow, Russia; mkorobov49@gmail.com
M. A. Proskurnin – Chemistry Department, Lomonosov Moscow State University, Moscow; Analytical Centre of Lomonosov Moscow State University / Agilent Technologies Authorized Partner Laboratory, Moscow, Russia; proskurnin@gmail.com
A thermal-lens spectrometer implementing back-synchronized detection technique with a mode-mismatched optical scheme was constructed. Steady-state and transient signals of thermal-lens spectrometry are used to characterize concentration parameters of aqueous fullerene dispersions (AFDs) at the level of 10-7 – 10-5 M and to assess thermophysical properties of AFDs. The detection limits of fullerenes in AFDs are 100 nM for C60, 80 nM for C70 and C78 – C88, and 60 nM for Y@C82, which are 20-fold lower than for spectrophotometry. Suitable precision of measurements of thermal diffusivity and thermal effusivity for AFDs is shown.
Keywords: thermal-lens spectrometry, pristine fullerenes, aqueous fullerene dispersions, thermal diffusivity.
DOI 10.17586/2220-8054-2018-9-1-14-16
