title: Modulation of energy/electron transfer in gold nanoclusters by single walled carbon nanotubes and further consequences.
abstract: Semiconductor or metallic character in single-walled carbon nanotubes (SWCNTs) is developed because of their chirality and diameter. Depending upon the extent of these characters in a particular sample of SWCNT, various electronic and mechanical applications are formulated. In this work we used protein protected red emitting gold nanoclusters (AuNCs) to enhance the metallic character in SWCNTs through electron transfer induced by photonic excitation. The AuNCs have been synthesized following a known protocol that generates Au(+) protected Au(0) clusters. Normal and carboxylic acid functionalized SWCNTs were obtained commercially for usage in the experiments. The non-functionalized SWCNTs facilitate intersystem electron transfer while the functionalized ones defer the phenomenon, which, in turn, affects the metallic character in the nanotubes. Steady state and time resolved fluorescence spectroscopy prove the dynamics and electrochemistry supports the intersystem electron transfer process.
authors: Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur Campus, Mohanpur 741246, India.
authors: Tarasankar
authors: T
authors: Das
authors: Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur Campus, Mohanpur 741246, India.
authors: Arnab
authors: A
authors: Maity
authors: Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur Campus, Mohanpur 741246, India.
authors: Somen
authors: S
authors: Mondal
authors: Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur Campus, Mohanpur 741246, India. Electronic address: pradiptp@gmail.com.
authors: Pradipta
authors: P
authors: Purkayastha
mesh_terms: D055664:Electrochemical Techniques; D004583:Electrons; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D013050:Spectrometry, Fluorescence; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D013059:Spectrum Analysis, Raman; D013816:Thermodynamics; D013997:Time Factors
chemical_list: D037742:Nanotubes, Carbon; D006046:Gold
keywords: Carbon nanotubes; Energy transfer; Fluorescence; Gold nanoclusters; Metallic character; Raman spectroscopy