DataVXACS Applied Materials & InterfacesPaper
journal article·2024-05-01

Novel Au/Cu2NiSnS4 Nano-Heterostructure: Synthesis, Structure, Heterojunction Band Offset and Alignment, and Interfacial Charge Transfer Dynamics

Yogesh A. Jadhav, Ganesh K. Rahane, Tanmay Goswami, Kusuma Jagadish, Kalyani Chordiya, Anurag Roy, Tushar Debnath, Sagar B. Jathar, Rupesh Devan, Mousumi Upadhyay Kahaly, Sachin R. Rondiya, Hirendra N. Ghosh, Nelson Y. Dzade

ACS Applied Materials & Interfaces· Volume 16· Issue 17
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Source abstract

Abstract

Considering the importance of physics and chemistry at material interfaces, we have explored the coupling of multinary chalcogenide semiconductor Cu2NiSnS4 nanoparticles (CNTS NPs) for the first time with the noble metal (Au) to form Au-CNTS nano-heterostructures (NHSs). The Au-CNTS NHSs is synthesized by a simple facile hot injection method. Synergistic experimental and theoretical approaches are employed to characterize the structural, optical, and electrical properties of the Au-CNTS NHSs. The absorption spectra demonstrate enhanced and broadened optical absorption in the ultraviolet-visible-near-infrared (UV-Vis-NIR) region, which is corroborated by cyclic voltammetry (CV) readings. CV measurements show type II staggered band alignment, with a conduction band offset (CBO) of 0.21 and 0.23 eV at the Au-CNTS/CdS and CNTS/CdS interface, respectively. Complementary first-principles density functional theory (DFT) calculations predict the formation of a stable Au-CNTS NHSs, with the Au nanoparticle transferring its electrons to the CNTS. Moreover, our interface analysis using ultrafast transient absorption experiments demonstrate that the Au-CNTS NHSs facilitates efficient transport and separation of photoexcited charge carriers when compared to pristine CNTS. The transient measurements further reveal a plasmonic electronic transfer from the Au nanoparticle to CNTS. Our advanced analysis and findings will prompt investigations into new functional materials and their photo/electrocatalysis and optoelectronic device applications in the future.
Source: europepmc · Quality: candidate unverified · Source record ↗

Research context

NanomaterialsElectronic materialsCatalysis & surfaces

OpenAlex topics: Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties · Copper-based nanomaterials and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Symbiosis Center for Nanoscience and Nanotechnology (SCNN), Symbiosis International (Deemed University) (SIU), Lavale, Pune 412115, Maharashtra, India

Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India

Institute of Nano Science and Technology, SAS Nagar Sector 81, Mohali, Punjab 140306, India

ELI-ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner utca 3., Szeged H-6728, Hungary

Environment and Sustainability Institute, University of Exeter, Penryn Campus, Cornwall TR10 9FE, U.K.

Nano Physical Spectroscopy Group, Department of Chemistry, School of Natural Sciences, Shiv Nadar Institution of Eminence, Delhi NCR 201314, Uttar Pradesh, India

Department of Physics, Savitribai Phule Pune University, Pune 411007, India

Department of Metallurgy Engineering and Materials Science, Indian Institute of Technology Indore, Simrol, Indore 453552, India

School of Chemical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar 752050, Odisha, India

Department of Energy and Mineral Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States

Funding

Indo-French Centre for the Promotion of Advanced Research · University Grants Commission · Science and Engineering Research Board · Indian Institute of Science · Savitribai Phule Pune University · John and Willie Leone Family Department of Energy and Mineral Engineering, College of Earth and Mineral Sciences, Pennsylvania State University

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