A5071617484- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Advanced Photocatalysis Techniques
- Gold and Silver Nanoparticles Synthesis and Applications
- Perovskite Materials and Applications
- TiO2 Photocatalysis and Solar Cells
- Copper-based nanomaterials and applications
- Nanoplatforms for cancer theranostics
- Advanced Thermoelectric Materials and Devices
- Nanocluster Synthesis and Applications
- Nanoparticle-Based Drug Delivery
- Advanced Nanomaterials in Catalysis
- Advanced biosensing and bioanalysis techniques
- Porphyrin and Phthalocyanine Chemistry
- Photochemistry and Electron Transfer Studies
- Crystallization and Solubility Studies
- Ionic liquids properties and applications
- Molecular Junctions and Nanostructures
- X-ray Diffraction in Crystallography
- Spectroscopy and Quantum Chemical Studies
- Photoreceptor and optogenetics research
- Catalytic Processes in Materials Science
- Photodynamic Therapy Research Studies
- Electrochemical Analysis and Applications
- Gas Sensing Nanomaterials and Sensors
Case Western Reserve University
2016-2025
Nanomaterials Research (United States)
2009-2023
Xi'an Jiaotong University
2019-2020
Chemical Dynamics (United States)
2005-2019
Kent State University
2016
Zhejiang University
2013
Nanjing University
2004-2011
John Carroll University
2010
McGill University
2010
University of Toronto
2010
TiO2 - xNx nanoparticles were prepared by employing the direct amination of 6−10-nm-sized titania particles. Doping on nanometer scale led to an enhanced nitrogen concentration up 8%, compared ≤2% in thin films and micrometer-scale powders. The synthesized nanocrystals are catalytically active absorb well into visible region 600 nm, thus exemplifying use a nanostructure-based synthesis as means producing novel photocatalytic materials.
The origin of the visible-light absorption main-group element (C, N, S) doped TiO2 nanostructures is investigated via diffuse reflectance and valence band X-ray photoelectron spectroscopy. synthesized C-, N-, S-doped titania nanomaterials show an increased electron density states above TiO2, which explains red-shifted light these potential photocatalysts simultaneously suggests a lowered as photooxidants compared to Degussa P25 TiO2.
Cu2−xS (x = 1, 0.2, 0.03) nanocrystals were synthesized with three different chemical methods: sonoelectrochemical, hydrothermal, and solventless thermolysis methods in order to compare their common optical structural properties. The compositions of the varied from CuS (covellite) Cu1.97S (djurleite) through adjusting reduction potential sonoelectrochemical method, pH value hydrothermal method by choosing precursor pretreatments approach, respectively. crystallinity morphology products...
It is well-known that inorganic nanocrystals are a benchmark model for nanotechnology, given the tunability of optical properties and stabilization specific phases uniquely possible at nanoscale. Copper (I) oxide (Cu2O) metal semiconductor with promising applications in solar energy conversion catalysis. To understand Cu/Cu2O/CuO system nanoscale, we have developed method preparing highly uniform monodisperse Cu2O. The procedure also serves to demonstrate our development generalized...
The applicability of semiconductor QDs in photodynamic therapy (PDT) was evaluated by studying the interaction between CdSe with a known silicon phthalocyanine PDT photosensitizer, Pc4. study revealed that could be used to sensitize agent through fluorescence resonance energy transfer (FRET) mechanism, or interact directly molecular oxygen via triplet energy-transfer process (TET). Both mechanisms result generation reactive singlet species can for cancer therapy.
Gold nanorods have been found to change their shape after excitation with intense pulsed laser irradiation. The final irradiation products strongly depend on the energy of pulse as well its width. We performed a series measurements in which power was varied over range output an amplified femtosecond system producing pulses 100 fs duration and nanosecond optical parametric oscillator (OPO) having width 7 ns. transformations gold are followed by two techniques: (1) visible absorption...
Using a simple nanoscale exclusive synthesis route, TiO2-xNx photocatalysts that can be tuned to absorb across the visible region are produced in seconds at room temperature. The formed by employing direct nitridation of anatase TiO2 nanostructures with alkylammonium salts. Depending on degree nanoparticle agglomeration, catalytically active structured particles obtained whose absorption onset extends well into λ ∼ 550 nm. introduction small quantity palladium form chloride or nitrate...
A highly efficient drug vector for photodynamic therapy (PDT) delivery was developed by synthesizing PEGylated gold nanoparticle conjugates, which act as a water-soluble and biocompatible "cage" that allows of hydrophobic to its site PDT action. The dynamics release in vitro two-phase solution system vivo cancer-bearing mice indicates the process is efficient, passive targeting prefers tumor site. With Au NP−Pc 4 time required has been greatly reduced less than 2 h, compared days free drug.
A series of titania (TiO2)-based nanometer-sized photocatalysts, including nitrogen-doped TiO2 nanoparticles (NPs), are investigated using X-ray photoelectron spectroscopy (XPS). Conclusive evidence is obtained for O−Ti−N bond formation during the doping process. Therefore, this substitutional held accountable significant increase in photocatalytic activity NPs.
CH3NH3PbI3 perovskite layered films deposited on substrates with and without a titania support structure have been prepared studied using time-resolved femtosecond transient absorption (fs-TA) spectroscopy in the visible light range (450-800 nm). The electron injection dynamics from photoexcited layers to neighboring film structures could be directly monitored via bleaching of at ∼750 nm thus systematically as function layer-by-layer architecture. In addition, for first time we spectrally...
We studied the shape transformation (by use of TEM and optical absorption spectroscopy) gold nanorods in micellar solution by exposure to laser pulses different pulse width (100 fs 7 ns) energies (μJ mJ) at 800 nm, where longitudinal surface plasmon oscillation absorb. At moderate energies, femtosecond irradiation melts near spherical particles comparable volumes while nanosecond fragment them smaller near-spherical particles. high fragmentation is also observed for irradiation. A mechanism...
Abstract A nitrogen‐doped TiO 2 nanocolloid has been successfully prepared and its properties compared with the commercially available nanomaterial, Degussa P25. Several characterization techniques, X‐ray diffraction (XRD), photoelectron spectroscopy (XPS), transmission electron (TEM), Fourier transform infrared (FT‐IR) spectroscopy, Raman scattering, UV‐visible reflectance spectra, are combined in order to determine crystal phase grain size, shape, degree of nitrogen incorporation, nature...
The development of copper chalcogenide based nanomaterials as promising candidates for sustainable energy materials, due to their environmental compatibility and low toxicity, is presented discussed in this review. Different solution syntheses have recently been developed the low-cost preparation nanocrystals, unique properties derived from deficiencies were investigated with much progress. notorious compositional instability defect formation nanocrystals healed by forming donor–acceptor...
Perovskite films were prepared using single step solution deposition at different annealing temperatures and times. The crystal structure, phases grain size investigated with XRD, XPS SEM/EDX. show a typical orientation of tetragonal perovskite phase gradual transition room temperature from the yellow intermediate to black phase. Films high purity obtained by sintering 100 °C. In addition, chemical composition structure in detail. FTIR, UV-vis NMR spectra revealed occurance DMF complexes....
For over half a century, alternating electric fields have been used to induce particle transport, furnishing the ζ-potential of analytes with sizes ranging from few nanometers several micrometers. Concurrent advances in nanotechnology provided new materials for catalysis, self-assembly, and biomedical applications, all which benefit thorough understanding surface charge. Therefore, measurement via electrophoretic light scattering (ELS) has become essential nanoparticle (NP) research....
Efficient drug delivery to tumors is of ever-increasing importance. Single-visit diagnosis and treatment sessions are the goal future theranostics. In this work, a noncovalent PDT cancer drug-gold nanoparticle (Au NP) conjugate system performed rapid release deep penetration into within hours. The mechanism through Au NPs by passive accumulation was investigated via fluorescence imaging, elemental analysis, histological staining. pharmacokinetics conjugates over 7-day test period showed...
The design of an ideal drug delivery system with targeted recognition and zero premature release, especially controlled specific release that is triggered by exclusive endogenous stimulus, a great challenge. A traceable aptamer-targeted nanocarrier has now been developed; the was obtained capping mesoporous silica-coated quantum dots programmable DNA hybrid, microRNA. Once nanocarriers had delivered into HeLa cells aptamer-mediated endocytosis, overexpressed miR-21 served as key to unlock...
Photoelectrochemical (PEC) water splitting represents a promising route to convert solar energy into clean hydrogen. Constructing tandem cells has emerged as feasible approach and attracted tremendous attention for self-biased splitting, especially using low-cost stable metal oxides. Herein, state-of-the-art review of oxide-based PEC/photovoltaic (PV) PEC is comprehensively presented, with focus on crucial issues designing efficient devices from the aspects photoanodes, photocathodes,...
Deep eutectic solvents (DESs) are an emerging class of non-aqueous that potentially scalable, easy to prepare and functionalize for many applications ranging from biomass processing energy storage technologies. Predictive understanding the fundamental correlations between local structure macroscopic properties is needed exploit large design space tunability DESs specific applications. Here, we employ a range computational experimental techniques span length-scales molecular timescales...