4 papers
Direct observation of structural heterogeneity and tautomerization of single hypericin molecules
Quan Liu, Frank Wackenhut, Liangxuan Wang +6
Tautomerization is a fast chemical reaction where structures of the reactants differ only in the position of a proton and a double bond. Tautomerization often occurs in natural sub…
Periodic Fluorescence Variations of CdSe Quantum Dots Coupled to Aryleneethynylenes with Aggregation Induced Emission
Krishan Kumar, Jonas Hiller, Markus Bender +7
CdSe nanocrystals and aggregates of an aryleneethynylene derivative are assembled into a hybrid thin film with dual fluorescence from both fluorophores. Under continuous excitation…
Hypericin: Single molecule spectroscopy of an active natural ingredient
Quan Liu, Frank Wackenhut, Otto Hauler +4
Hypericin can be found in nature in Hypericum perforatum (St. John's Wort) and has become subject of intense biochemical research. Studies report of antidepressive, antineoplastic,…
A Dye-Sensitized CdSe Nanocrystal Optical Transistor with High ON/OFF Ratio in the First Telecom Window with 74 ns Rise Time
Krishan Kumar, Quan Liu, Jonas Hiller +5
We report an optically gated transistor composed of CdSe nanocrystals (NCs), sensitized with the dye Zinc beta-tetraaminophthalocyanine for operation in the first telecom window. T…