Journal ArticleDOI
Modulation of Cu2–xS Nanocrystal Plasmon Resonance through Reversible Photoinduced Electron Transfer
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TLDR
A photochemically induced phenomenon of modulating the plasmon resonance in a controlled fashion is reported, as photogenerated reduced methyl viologen radicals transfer electrons to Cu(2-x)S in inert solutions, and a decrease in localized surface plasMon resonance (LSPR) absorbance is observed.Abstract:
Copper sulfide (Cu(2-x)S) nanocrystals with nonstoichiometric composition exhibit plasmon resonance in the near-infrared region. Compositional changes and varying electron density markedly affect the position and intensity of the plasmon resonance. We report a photochemically induced phenomenon of modulating the plasmon resonance in a controlled fashion. As photogenerated reduced methyl viologen radicals transfer electrons to Cu(2-x)S in inert solutions, we observe a decrease in localized surface plasmon resonance (LSPR) absorbance at 1160 nm. Upon exposure to air, the plasmon resonance band recovers as stored electrons are scavenged away by oxygen. This cycle of electron charge and discharge of Cu(2-x)S nanocrystals is reversible and can be repeated through photoirradiation in N2 saturated solution followed by exposure of the suspension to air. The spectroscopic studies that provide mechanistic insights into the reversible charging and discharging of plasmonic Cu(2-x)S are discussed.read more
Citations
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Journal ArticleDOI
Localized Surface Plasmon Resonance in Semiconductor Nanocrystals
Ankit Agrawal,Shin Hum Cho,Omid Zandi,Sandeep Ghosh,Robert W. Johns,Robert W. Johns,Delia J. Milliron +6 more
TL;DR: The fundamental electromagnetic dynamics governing light matter interaction in plasmonic semiconductor NCs and the realization of various distinctive physical properties made possible by the advancement of colloidal synthesis routes to such NCs are discussed.
Journal ArticleDOI
Plasmonic doped semiconductor nanocrystals: Properties, fabrication, applications and perspectives
TL;DR: In this article, the authors highlight the recent advances in the synthesis of various different plasmonic semiconductor NCs with LSPRs covering the entire spectral range, from the mid-to the NIR.
Journal ArticleDOI
Degenerately hydrogen doped molybdenum oxide nanodisks for ultrasensitive plasmonic biosensing
Bao Yue Zhang,Ali Zavabeti,Adam F. Chrimes,Adam F. Chrimes,Farjana Haque,Luke A. O'Dell,Hareem Khan,Nitu Syed,Robi S. Datta,Yichao Wang,Anthony S. R. Chesman,Torben Daeneke,Kourosh Kalantar-zadeh,Jian Zhen Ou +13 more
TL;DR: In this article, a plasmonic hydrogen doped molybdenum oxides (H x MoO 3 ), with the morphology of 2D nanodisks, using a representative enzymatic glucose sensing model, is demonstrated.
Journal ArticleDOI
Electrospun Micropatterned Nanocomposites Incorporated with Cu2S Nanoflowers for Skin Tumor Therapy and Wound Healing
TL;DR: This proof-of-concept study offers a facile and reliable strategy for localized skin tumor therapy and tissue regeneration using bifunctional tissue engineering biomaterials, showing great promise for tumor-induced wound healing applications.
Journal ArticleDOI
An Ultrasensitive Silicon Photonic Ion Sensor Enabled by 2D Plasmonic Molybdenum Oxide
Guanghui Ren,Bao Yue Zhang,Qifeng Yao,Ali Zavabeti,Ali Zavabeti,César S. Huertas,Robert Brkljača,Muhammad Waqas Khan,Hussein Nili,Robi S. Datta,Hareem Khan,Azmira Jannat,Sumeet Walia,Farjana Haque,Luke A. O'Dell,Yichao Wang,Lianqing Zhu,Arnan Mitchell,Jian Zhen Ou +18 more
TL;DR: A silicon photonic ion sensor enabled by an ionic dopant-driven plasmonic material that offers the unique potential for ultrasensitive and robust measurement of changes in ionic environment, generating new modalities for on-chip chemical sensors in the micro/nanoscale is introduced.
References
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Journal ArticleDOI
Noble Metals on the Nanoscale: Optical and Photothermal Properties and Some Applications in Imaging, Sensing, Biology, and Medicine
TL;DR: How the unique tunability of the plasmon resonance properties of metal nanoparticles through variation of their size, shape, composition, and medium allows chemists to design nanostructures geared for specific bio-applications is emphasized.
Journal ArticleDOI
Some interesting properties of metals confined in time and nanometer space of different shapes.
TL;DR: Some of the observed new chemical, optical, and thermal properties of metallic nanocrystals when their size is confined to the nanometer length scale and their dynamical processes are observed on the femto- to picosecond time scale are described.
Journal ArticleDOI
Localized surface plasmon resonances arising from free carriers in doped quantum dots
Joseph M. Luther,Joseph M. Luther,Prashant K. Jain,Prashant K. Jain,Trevor Ewers,Trevor Ewers,A. Paul Alivisatos,A. Paul Alivisatos +7 more
TL;DR: In this article, the authors describe localized surface plasmon resonances arising from p-type carriers in vacancy-doped semiconductor quantum dots (QDs) and demonstrate that doped QDs allow realization of LSPRs and quantum-confined excitons within the same nanostructure.
Journal ArticleDOI
Copper selenide nanocrystals for photothermal therapy.
Colin M. Hessel,Varun P. Pattani,Michael R. Rasch,Matthew G. Panthani,Bonil Koo,James W. Tunnell,Brian A. Korgel +6 more
TL;DR: In vitro photothermal heating of Cu(2-x)Se nanocrystals in the presence of human colorectal cancer cell (HCT-116) led to cell destruction after 5 min of laser irradiation at 33 W/cm(2), demonstrating the viabilitiy of Cu
Journal Article
Near-Infrared Localized Surface Plasmon Resonances Arising from Free Carriers in Doped Quantum Dots
TL;DR: In this article, the authors describe localized surface plasmon resonance (LSPR) arising from p-type carriers in vacancy-doped semiconductor quantum dots, which opens up possibilities for light harvesting, nonlinear optics, optical sensing and manipulation of solid-state processes in single nanocrystals.