Photoinduced dynamics of a cyanine dye: parallel pathways of non-radiative deactivation involving multiple excited-state twisted transients

S Upadhyayula, V Nunez, EM Espinoza, JM Larsen… - Chemical …, 2015 - pubs.rsc.org
Cyanine dyes are broadly used for fluorescence imaging and other photonic applications. 3,
3′-Diethylthiacyanine (THIA) is a cyanine dye composed of two identical aromatic …

In Situ Liquid Phase TEM of Nanoparticle Formation and Diffusion in a Phase-Separated Medium

Y Son, BH Kim, BK Choi, Z Luo, J Kim… - … Applied Materials & …, 2022 - ACS Publications
Colloidal nanoparticles are synthesized in a complex reaction mixture that has an
inhomogeneous chemical environment induced by local phase separation of the medium …

Contrasting hydration dynamics in DME and DMSO aqueous solutions: A combined optical pump-probe and GHz-THz dielectric relaxation investigation

DD Mahanta, SI Islam, S Choudhury, DK Das… - Journal of Molecular …, 2019 - Elsevier
Addition of co-solvents could introduce perturbation in the H-bond dynamics of water and
the extent of perturbation is mostly dependent on the H-bond formation affinity of the …

Cryo-transmission electron microscopy reveals mesoscopic H-and J-aggregates of near infrared cyanine dyes

H Berlepsch, C Böttcher - Journal of Photochemistry and Photobiology A …, 2010 - Elsevier
Cryogenic transmission electron microscopy (cryo-TEM) studies were performed to probe
the morphological structure of aggregates formed by the two near-infrared dyes IR-140 and …

Observing ground state vibrational coherence and excited state relaxation dynamics of a cyanine dye in pure solvents

DK Das, K Makhal, D Goswami - Physical Chemistry Chemical Physics, 2018 - pubs.rsc.org
Using a degenerate pump probe technique at 800 nm, Ground State Vibrational Coherence
(GSVC) of a cyanine dye (IR780) is explored in various solvents. Five representative …

Polarization induced control of multiple fluorescence from a molecule

DK Das, K Makhal, S Singhal, D Goswami - Chemical Physics Letters, 2013 - Elsevier
We show novel dual fluorescent behavior of a popular indocyanine dye molecule, IR125, in
dimethyl-sulfoxide solvent when excited at 527 nm instead of the conventional near-infrared …

Excess Charge Density and its Relationship with Surface Tension Increment at the Air− Electrolyte Solution Interface

J Song, MW Kim - The Journal of Physical Chemistry B, 2011 - ACS Publications
The adsorption isotherms of probe cationic molecules were measured at various electrolyte
solution interfaces by resonant second harmonic generation. The excess charge density …

Probing solvent dependent femtosecond transient coherent oscillations to reveal interfacial dynamics

DK Das, K Makhal, D Goswami - Journal of Optics, 2022 - iopscience.iop.org
Probing transient states in molecules having vibronic transitions with femtosecond (fs) laser
pulses often results in coherent oscillations either in the ground state, the excited states, or …

Sensing near the liquid: liquid interface remotely via ultrafast pump probe study

DK Das, K Makhal, D Goswami - 2015 Workshop on Recent …, 2015 - ieeexplore.ieee.org
Ultrafast pump-probe technique has been invoked to understand the liquid: liquid interface
by using a cyanine dye dissolved in dimethyl sulfoxide (DMSO), interfaced with neat diethyl …

[PDF][PDF] Asian Journal of Physics

D Goswami, DK Das, K Makhal - Asian Journal of Physics, 2020 - researchgate.net
We report results establishing that detection of the liquid-liquid interface is possible through
femtosecond pumpprobe spectroscopy. In particular, we use femtosecond laser pulses to …