13 Result(s)
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Vasudevanpillai Biju
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Article
Open AccessFree-standing 2D gallium nitride for electronic, excitonic, spintronic, piezoelectric, thermoplastic, and 6G wireless communication applications
Two-dimensional gallium nitride (2D GaN) with a large direct bandgap of ~5.3 eV, a high melting temperature of ~2500 °C, and a large Young’s modulus ~20 GPa developed for miniaturized interactive electronic ga...
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Article
Open AccessCaging and photo-triggered uncaging of singlet oxygen by excited state engineering of electron donor–acceptor-linked molecular sensors
Singlet oxygen (1O2), one of the most sought-after species in oxidative chemical reactions and photodynamic cancer therapy, is activated and neutralized in the atmosphere and living cells. It is essential to see ...
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Article
Open AccessMultimodal CTC detection using stem cell antigen-specific immunosilica particles and immunofluorescent quantum dots
Amid the COVID-19 pandemic, cancer continues to be the most devastating disease worldwide. Liquid biopsy of circulating tumor cells (CTCs) has recently become a painless and noninvasive tool for obtaining carc...
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Article
Open AccessMolecular recognition in the infection, replication, and transmission of COVID-19-causing SARS-CoV-2: an emerging interface of infectious disease, biological chemistry, and nanoscience
A coronavirus (CoV) commonly known as SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2) and causing COVID-19 (coronavirus disease of 2019) has become a pandemic following an outbreak in Wuhan. Altho...
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Article
Photoluminescent Ozone Sensor with Enhanced Sensitivity by Using CdSe/ZnS Quantum Dots Modified with Gold and Platinum
We report photoluminescence-based ozone sensing using composite films composed of gold or platinum and red-emitting CdSe/ZnS core-shell quantum dots. The sensing efficiency of quantum dots is enhanced by the a...
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Chapter
The Confinement and Migration of Charge-Carriers in Lead Halide Perovskites
With the growing success of halide perovskites as functional materials in solar cells, LEDs, and lasers, studies are progressing to reveal their optical and charge-carrier properties. This chapter describes th...
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Article
Open AccessMixed-halide perovskite synthesis by chemical reaction and crystal nucleation under an optical potential
The development of new methods to engineer lead halide perovskite crystals with a controlled band gap and emission properties is an active subject in materials science and chemistry. We present the preparation...
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Article
Kinetics of singlet oxygen sensing using 9-substituted anthracene derivatives \(^{\#}\)
Singlet oxygen ( \(^{1}\hbox {O}_{2}\) ...
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Article
Development of Technologies for Sensing Ozone in Ambient Air
Ozone (O3) gas is widely used as a strong oxidizing agent for many purposes, such as the decomposition/removal of organic contaminants and photoresist, and the deodorization/disinfection of air and water. However...
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Article
Förster Resonance Energy Transfer Mediated Photoluminescence Quenching in Stoichiometrically Assembled CdSe/ZnS Quantum Dot-Peptide Labeled Black Hole Quencher Conjugates for Matrix Metalloproteinase-2 Sensing
The steady state and time-resolved photoluminescence quenching of streptavidin modified CdSe/ZnS quantum dots (QDs) instigated by biotin-peptide-BHQ-1 (biotin-pep-BHQ-1) molecule was investigated. Here, we hav...
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Article
Sensing of ozone based on its quenching effect on the photoluminescence of CdSe-based core-shell quantum dots
Thin films of CdSe-based core-shell type quantum dots (CdSe/CdZnS, CdSe/ZnS and CdSeTe/ZnS) deposited on glass substrate were found to undergo a reversible change in photoluminescence (PL) on exposure to ozone...
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Article
Imaging the cell wall of living single yeast cells using surface-enhanced Raman spectroscopy
The surface of a living yeast cell (Saccharomyces cerevisiae strain W303-1A) has been labeled with silver (Ag) nanoparticles that can form nanoaggregates which have been shown to have surface-enhanced Raman scatt...
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Article
Semiconductor quantum dots and metal nanoparticles: syntheses, optical properties, and biological applications
We review the syntheses, optical properties, and biological applications of cadmium selenide (CdSe) and cadmium selenide–zinc sulfide (CdSe–ZnS) quantum dots (QDs) and gold (Au) and silver (Ag) nanoparticles (...
