A5078921815- High-pressure geophysics and materials
- Skin Protection and Aging
- Ion-surface interactions and analysis
- Diamond and Carbon-based Materials Research
- Metal and Thin Film Mechanics
- Olfactory and Sensory Function Studies
- Photodynamic Therapy Research Studies
- Combustion and flame dynamics
- Spectroscopy and Quantum Chemical Studies
- Atmospheric chemistry and aerosols
- Photochemistry and Electron Transfer Studies
- Biocrusts and Microbial Ecology
- Lichen and fungal ecology
University of Warwick
2020-2023
Engineering and Physical Sciences Research Council
2020-2023
Coventry (United Kingdom)
2020
The sparsity of efficient commercial ultraviolet-A (UV-A) filters is a major challenge toward developing effective broadband sunscreens with minimal human- and eco-toxicity. To combat this, we have designed new class Meldrum-based phenolic UV-A filters. We explore the ultrafast photodynamics coumaryl Meldrum, CMe, sinapyl Meldrum (SMe), both in an industry-standard emollient on synthetic skin mimic, using femtosecond transient electronic vibrational absorption spectroscopies computational...
Light-to-heat conversion materials generate great interest due to their widespread applications, notable exemplars being solar energy harvesting and photoprotection. Another more recently identified potential application for such is in molecular heaters agriculture, whose function protect crops from extreme cold weather extend both the growing season geographic areas capable of supporting growth, all which could help reduce food security challenges. To address this demand, a new series...
Atomic-scale defects can control the exploitable optoelectronic performance of crystalline materials, and several point in diamond are emerging functional components for a range quantum technologies. Nitrogen hydrogen common impurities incorporated into diamond, there is family that includes both. The N3VH0 defect lattice vacancy where three nearest neighbor carbon atoms replaced with nitrogen bonded to remaining carbon. It regularly observed natural high-temperature annealed synthetic gives...
With the growing concern regarding commercially available ultraviolet (UV) filters damaging environment, there is an urgent need to discover new UV filters. A family of molecules called mycosporines and mycosporine-like amino acids (referred as MAAs collectively) are synthesized by cyanobacteria, fungi algae act natural for these organisms. Mycosporines formed a cyclohexenone core structure while cyclohexenimine structure. To better understand photoprotection properties MAAs, we implement...
The dynamics of the 3237 cm−1 local vibrational mode in diamond, associated with an unknown defect, was investigated using ultrafast infrared pump-probe spectroscopy. When pumped at cm−1, a degenerate probe used to study ground state's recovery, while non-degenerate tracked excited state absorption 3029 corresponding 1 → 2 transition. similar population lifetimes for recovery and suggests single decay pathway, lifetime T1=2.2±0.1ps. Perturbed free induction signals observed negative time...
The perturbed free induction decay (PFID) observed in ultrafast infrared spectroscopy was used to unveil the rates at which different vibrational modes of same atomic-scale defect can interact with their environment. N_{3}VH^{0} diamond provided a model system, allowing comparison stretch and bend within crystal lattice environments. mode (first overtone) exhibited dephasing times T_{2}=2.8(1) ps, while fundamental had surprisingly faster dynamics T_{2}<1.7 ps driven by its more direct...