Structural Observation of the Primary Isomerization in Vision with Femtosecond-Stimulated Raman
- P. Kukura, D. McCamant, Sangwoon Yoon, Daniel B Wandschneider, R. Mathies
- 11 November 2005
The spectral evolution of the vibrational features from 200 femtoseconds to 1 picosecond after photon absorption reveals the temporal sequencing of the geometric changes in the retinal backbone that activate this receptor.
Femtosecond broadband stimulated Raman spectroscopy: Apparatus and methods.
- D. McCamant, P. Kukura, Sangwoon Yoon, R. Mathies
- Chemistry, PhysicsReview of Scientific Instruments
- 2 November 2004
The dependence of the stimulated Raman signal on experimental parameters is explored, demonstrating the expected exponential increase in Raman intensity with concentration, pathlength, and Raman pump power.
The relative reactivity of CH3D molecules with excited symmetric and antisymmetric stretching vibrations
Experimental and theoretical studies explore the reactivity of the symmetric and the antisymmetric stretching vibrations of monodeuterated methane (CH3D). Direct infrared absorption near 3000 cm−1…
Metal ion induced FRET OFF-ON in tren/dansyl-appended rhodamine.
- M. H. Lee, Hyun Jung Kim, Sangwoon Yoon, N. Park, Jong Seung Kim
- ChemistryOrganic Letters
- 17 January 2008
A series of new fluorescent probes bearing tren-spaced rhodamine B and dansyl groups have been synthesized and compound 1 shows the best FRET efficiency throughdansyl emission to rhodamines absorption for the Cu2+ ion.
The Effect of Laser Pulse Widths on Laser—Ag Nanoparticle Interaction: Femto- to Nanosecond Lasers
- J. Jeon, Sangwoon Yoon, H. Choi, Joohan Kim, D. Farson, Sung-Hak Cho
- Physics, Materials Science
- 14 January 2018
The effect of the laser pulse width on the production of nanoparticles by laser fragmentation was investigated. Laser pulse widths of 164 fs, 5 ps, 4 ns, 36 ns, 64 ns, and 100 ns were used. To assess…
Plasmon coupling between silver nanoparticles: Transition from the classical to the quantum regime.
Ultrafast Excitonic Behavior in Two-Dimensional Metal–Semiconductor Heterostructure
The excitonic behavior in two-dimensional (2D) heterostructures of transition metal dichalcogenide atomic layers has attracted much attention. Here, we report, for the first time, the ultrafast beh...
Surface Modification of Citrate-Capped Gold Nanoparticles Using CTAB Micelles
The surface of nanoparticles governs the overall properties of the nanoparticles because nanoparticles have a large surface-to-volume ratio. Charge, crystallinity, and chemical properties (such as…
Time-dependent and symmetry-selective charge-transfer contribution to SERS in gold nanoparticle aggregates.
The time- and symmetry-dependent surface-enhanced Raman scattering (SERS) of gold nanoparticle (AuNP) aggregates is reported and the faster appearance of b(2)-mode enhancement for the AuNPs with initially higher zeta potentials is corroborated.
Synthesis and Surface Characterization by Raman Spectroscopy of Water-Dispersible ZnS:Mn Nanocrystals Capped with Mercaptoacetic Acid
Semiconductor nanocrystals have been extensively studied due to their size-dependent optical properties and wide applications. Many efforts have been made to develop nanoparticles with superior…