A5069524332- Porphyrin and Phthalocyanine Chemistry
- Photochromic and Fluorescence Chemistry
- Photodynamic Therapy Research Studies
- Semiconductor materials and devices
- Enzyme Structure and Function
- Molecular Junctions and Nanostructures
- Advancements in Semiconductor Devices and Circuit Design
- Analytical Chemistry and Sensors
- Integrated Circuits and Semiconductor Failure Analysis
- Semiconductor Lasers and Optical Devices
- Nanoplatforms for cancer theranostics
- Lipid Membrane Structure and Behavior
- Organic Electronics and Photovoltaics
- Organic Chemistry Cycloaddition Reactions
- Surface Chemistry and Catalysis
- X-ray Spectroscopy and Fluorescence Analysis
- Metal complexes synthesis and properties
- Biochemical and Molecular Research
- Synthesis and properties of polymers
- Photochemistry and Electron Transfer Studies
- Thin-Film Transistor Technologies
- Inorganic and Organometallic Chemistry
- Protein Structure and Dynamics
- Advanced X-ray Imaging Techniques
- Photosynthetic Processes and Mechanisms
Greenwich Hospital
2024
ON Semiconductor (United States)
2008-2022
University of East Anglia
2003-2020
Norwich Research Park
2014-2020
Cornell University
1998-2019
University of Newcastle Australia
2019
Queen Mary University of London
2018
Brunel University of London
2018
Savitribai Phule Pune University
2018
Cornell High Energy Synchrotron Source
2014
X-ray scattering of biological macromolecules in solution is an increasingly popular tool for structural biology and benefits greatly from modern high-brightness synchrotron sources. The upgraded MacCHESS BioSAXS station now located at the 49-pole wiggler beamline G1. 20-fold improved flux over previous F2 provides higher sample throughput autonomous data collection using a unique SAXS/WAXS dual detectors configuration. This setup achieves combined q-range 0.007 to 0.7 Å(-1), enabling better...
The absorption characteristics, emission spectra, luminescent quantum yields, and lifetimes are reported for 24 ruthenium(II) tris-1,10-phenanthroline complexes in EtOH–MeOH solution. Quantum yields fall between 0.019 0.403, the highest values being recorded substituted at 4,7-sites with aryl groups. Incorporation of these derivatives into poly(vinyl chloride) film raises leading to ranging from 0.40 0.75.
Metal 1,4,8,11,15,18,22,25-octakis(hexylsulfanyl)phthalo-cyanines exhibit a weak absorption band in the 450–600 nm region, leading to novel dyes that include red lead metallated derivative has been characterised by X-ray crystallography.
The monolayer and LB film-forming properties of 20 structurally related amphiphilic octa-substituted phthalocyanine derivatives have been assessed. molecular packing within examples the films has probed by visible-region spectroscopy low-angle X-ray diffraction methods. Among where aliphatic substituents are attached ether linkages, there is a variation in behaviour according to length chains whether or not branched. Films highly ordered but may contain domains structure, giving rise...
A fixed-target approach to high-throughput room-temperature serial synchrotron crystallography with oscillation is described. Patterned silicon chips microwells provide high crystal-loading density an extremely hit rate. The microfocus, undulator-fed beamline at CHESS, which has compound refractive optics and a fast-framing detector, was built optimized for this experiment. method described here collects 1–5° of data per crystal room temperature fast (10° s −1 ) rates translation times,...
The metal-free and nickel derivatives of hexaoctylpyridino[3,4]tribenzoporphyrazine generate conventional face-to-face aggregates in solution, exhibit columnar mesophases form assemblies upon evaporation solutions. By contrast, the zinc derivative forms alternative edge-to-face complexes through axial ligation one molecule to atom another, a process which inhibits mesophase behaviour leads new types visible region absorption signatures.
Bias Temperature Instability (BTI) measurements were performed on SiC n-channel DMOSFETs. The effects of the BTI stress electrical characteristics device studied using slow and fast measurements. Measurements show that change in threshold voltage (Vth) can be attributed to charge carrier trapping/de-trapping at border traps, while interface trapped density is found unaffected. measurements, however, shows significant Vth recovery taking place in-situ during measurement. Moreover, shift...
The synthesis and visible near-IR region absorption spectra of an 1,6,10,15,19,24,28,33-octaalkylnaphthalocyanine examples 3,4,12,13,21,22,30,31-octaalkyl 3,4,12,13,21,22,30,31-octaalkoxy-2,3-naphthalocyanines are reported.
The novel (pyridylazo)phenol derivative 8-[4-(2-pyridylazo)phenoxy]octyl disulfide (1) has been designed and synthesized for the formation of a monolayer film on gold-coated optical waveguides via technique self-assembly. photoinduced trans to cis isomerization self-assembled 1 (1 SAM) its interaction with transition-metal ions have studied by spectroscopic (UV−visible reflection absorption infrared) electrochemical methods. SAM in isomeric form provides bidentate ligand that can chelate...
A hybrid composite of non-aggregated lead sulfide (PbS) nanoparticles average size 5.8 ± 1 nm embedded within a film an octaalkyl substituted metal-free phthalocyanine (Compound 2) was prepared on interdigitated gold electrodes by mild acidic treatment newly synthesised octasubstituted analogue 1) in solid state phase. This nanocomposite shows enhancement in-plane electrical conductivity over that alone nearly 65%. observation is consistent with the formation charge complex compound as...
Gold nanoparticles, covalently functionalised with the photosensitiser C11Pc and PEG, were actively targeted towards epidermal growth factor receptor overexpressing cancers using peptide FITC-βAAEYLRK. Selective phototoxicity was observed at nanomolar concentrations minimal dark toxicity.
Two self-assembled monolayer (SAM) films containing the photoswitchable 4-pyridylazophenoxy chromophore have been deposited onto a gold-coated glass substrate. One film contains as single component, 1 SAM, and other is doped with nonphotoactive component 1:1 mixture, 2 SAM. The reversible photoswitching performances of SAM via evanescence field using light appropriate wavelengths investigated by UV spectroscopic electrochemical monitoring. In principle, trans-form SAMs present coordinating...