A5003313693- Molecular Junctions and Nanostructures
- Photonic and Optical Devices
- Force Microscopy Techniques and Applications
- Spectroscopy and Quantum Chemical Studies
- Mechanical and Optical Resonators
- Surface Chemistry and Catalysis
- Advanced Electron Microscopy Techniques and Applications
- Electronic and Structural Properties of Oxides
- Various Chemistry Research Topics
- Surface and Thin Film Phenomena
- Graphene research and applications
- Quantum Information and Cryptography
- Quantum-Dot Cellular Automata
- Innovative Teaching Methods
- Cell Image Analysis Techniques
- thermodynamics and calorimetric analyses
- MXene and MAX Phase Materials
- 2D Materials and Applications
- Semiconductor Lasers and Optical Devices
- Experimental Learning in Engineering
- Image Processing Techniques and Applications
- Spectroscopy Techniques in Biomedical and Chemical Research
- Ferroelectric and Negative Capacitance Devices
University of California, Los Angeles
2016-2022
California NanoSystems Institute
2016-2021
A vibronic resonance between Au{111} surface states and adsorbed CN vibrations has been predicted, which we target for study. We have formed stable monolayers of cyanide on observe a hexagonal close-packed lattice with nearest neighbor distance 3.8 ± 0.5 Å. Cyanide orients normal to the attached via Au–C bond. show that substrate–molecule coupling is particularly strong, leading ultrafast electron transfer from molecules substrate as measured by resonant Auger spectroscopy using core–hole...
We prepared titanyl phthalocyanine (TiOPc) monolayers on sapphire-prism supported Au{111} substrates through solution deposition and characterized their photoresponses using a custom-built laser-assisted scanning tunneling microscope under ambient conditions. Two types of lattice structures (hexagonal rectangular) were observed, the distributions photoinduced charges measured evanescently introduced 633 780 nm laser illumination. The photoexcited electrons in molecules hexagonal lattices...
Cyanide monolayers on Au{111} restructure from a hexagonal close-packed lattice to mixed-orientation "ribbon" structure through thermal annealing. The new surface loses most of the observed features characterizing initial as-adsorbed system with domain boundaries isolating rotationally offset regions where orientation is guided by underlying gold lattice. A blue shift higher frequencies CN vibration 2235 cm-1 respect CN/Au{111} at 2146 observed. In addition, low-frequency mode 145 cm-1,...
We report here a successful adaptation of lab videos used during remote instruction to kinetics experiment reported in this Journal 2007. In the in-person lab, students now record their rate data on cell phone cameras and then collect from for postlab reports; previously, they acquired real time spectrophotometer reading stopwatch. have found that increasing concentration bleach, which speeds up faster than can be directly recorded (1) does not affect reaction order (2) decreases time.
Scanning probe microscopies and spectroscopies enable investigation of surfaces even buried interfaces down to the scale chemical-bonding interactions, this capability has been enhanced with support computational algorithms for data acquisition image processing explore physical, chemical, biological phenomena. Here, we describe how scanning techniques have by some these recent algorithmic improvements. One improvement algorithm is advance beyond a simple rastering framework using spirals at...