Subnanogram Mass Measurements on Plasmonic Nanoparticles for Temperature-Programmed Thermal Analysis
Abbreviated Journal Title
J. Phys. Chem. Lett.
ALKANETHIOLATE MONOLAYERS; X-RAY; DESORPTION; RESONANCE; SPECTROSCOPY; GOLD; PRESSURE; BALANCE; ARRAYS; METAL; Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, ; Multidisciplinary; Physics, Atomic, Molecular & Chemical
Ultrasensitive thermogravimetric analysis of adsorbed organic molecules has been achieved on an ordered array of gold nanoparticles used as' a novel plasmonic nanobalance. The extinction peaks of the resonating surface plasmon of nanoparticle arrays shift upon loading molecules and return to the original position after a linear temperature rise process. A good correlation exists between the film thickness and magnitude of peak shifts. The detection range of plasmonic nanobalance derived from our results can reach a subnanogram level (1.8 pg on an active area of 100 mu m(2)), which is much lower than those of mechanical or electronic mass-measuring devices. Such high mass sensitivity, combined with the remote detection capability and high-temperature operation of plasmonic sensors, allows the in situ detections of the masses of loaded material and thermally desorbed molecules.
Journal of Physical Chemistry Letters
"Subnanogram Mass Measurements on Plasmonic Nanoparticles for Temperature-Programmed Thermal Analysis" (2010). Faculty Bibliography 2010s. 915.