A5028639584- Electrochemical Analysis and Applications
- Laser Material Processing Techniques
- Analytical Chemistry and Sensors
- Inorganic and Organometallic Chemistry
- Analytical chemistry methods development
- Muon and positron interactions and applications
- Laser-induced spectroscopy and plasma
- Manufacturing Process and Optimization
- Various Chemistry Research Topics
- Chemical Synthesis and Characterization
- Laser-Matter Interactions and Applications
- Advanced Chemical Physics Studies
- Metal complexes synthesis and properties
- Nonlinear Optical Materials Studies
- Atomic and Molecular Physics
- Electrochemical sensors and biosensors
- Ocular and Laser Science Research
- Inorganic Fluorides and Related Compounds
- Metamaterials and Metasurfaces Applications
- Analytical Chemistry and Chromatography
- Plasmonic and Surface Plasmon Research
- Molecular Spectroscopy and Structure
- Chemical Reactions and Mechanisms
- Water Quality Monitoring and Analysis
- Atmospheric Ozone and Climate
Shanghai Jiao Tong University
2022-2024
Shandong University
2024
East China Normal University
2017-2021
Shanxi University
2020
Shanghai Dianji University
2017
Guangxi University of Science and Technology
2010-2011
University of Missouri–Kansas City
1986-2005
City University of Hong Kong
1992-2002
National Sun Yat-sen University
1998
University of Hong Kong
1995
Femtosecond laser-induced periodic surface structures (LIPSS) have several applications in structuring and functionalization. Three major challenges exist the fabrication of regular uniform LIPSS: enhancing energy deposition, reducing residual heat, avoiding deposited debris. Herein, we fabricate an extremely low-spatial-frequency LIPSS (LSFL) on a silicon by temporally shaped femtosecond laser. Based <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="m1">...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of Traces Uranium with 1-(2-Pyridylazo)-2-naphtholK. L. ChengCite this: Anal. Chem. 1958, 30, 6, 1027–1030Publication Date (Print):June 1, 1958Publication History Published online1 May 2002Published inissue 1 June 1958https://pubs.acs.org/doi/10.1021/ac60138a004https://doi.org/10.1021/ac60138a004research-articleACS PublicationsRequest reuse permissionsArticle Views174Altmetric-Citations54LEARN ABOUT THESE METRICSArticle Views are the...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTApplication of positron annihilation to study the surface properties porous resinsK. Venkateswaran, K. L. Cheng, and Y. C. JeanCite this: J. Phys. Chem. 1984, 88, 12, 2465–2469Publication Date (Print):June 1, 1984Publication History Published online1 May 2002Published inissue 1 June 1984https://pubs.acs.org/doi/10.1021/j150656a010https://doi.org/10.1021/j150656a010research-articleACS PublicationsRequest reuse permissionsArticle...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReaction of Hydrogen Peroxide with Complexes (Ethylenedinitrilo)tetraacetic Acid and Nitrilotriacetic AcidK. L. Cheng P. F. LottCite this: Anal. Chem. 1956, 28, 4, 462–465Publication Date (Print):April 1, 1956Publication History Published online1 May 2002Published inissue 1 April 1956https://pubs.acs.org/doi/10.1021/ac50161a015https://doi.org/10.1021/ac50161a015research-articleACS PublicationsRequest reuse permissionsArticle...
The ultrafast dynamics of periodic ripples are studied during their formation on the surface a gold film with prefabricated nanogroove. These transient induced by single 800-nm, 50-fs laser pulse and observed collinear pump-probe imaging method. When polarization is parallel to nanogroove, begin appearing after an elapsed time 25--80 ps, become clear regular at 400--600 ps. ripple period increases from 685 770 nm as fluence $F$ 0.73...
This paper reports the ultrafast imaging on formation of periodic surface ripples induced by a single 800 nm, 50 fs laser pulse. The evolution process is observed Si with prefabricated nanogroove. emerge very quickly, only 3 ps after pulse fluence 0.18 J/cm2 irradiating surface, and last for several hundreds picoseconds. dynamics laser-matter interaction, such as free carrier excitation, lattice heating, plasmon polariton (SPP) etc, are studied theoretically. theoretical experimental results...
We report the generation of single negatively charged silicon vacancy (SiV−) color centers by focusing a femtosecond (fs) laser on top high-purity diamond coated with layer Si nanoball. Under interaction high-intensity fs laser, atoms were ionized and implanted into diamond, accompanied creation vacancies. After annealing at 850°C in vacuum for 1 h, photoluminescence spectra bright spots around created crater presented typical strong zero-phonon line 737 nm SiV− centers. Bright could be...
Abstract Bound states in the continuum (BIC) have attracted great attention nanophotonics past few years. The metasurface with inverted symmetry breaking exhibits high Q resonance through quasi-BIC (Q-BIC), which realizes light modulation, sensing and nonlinear generation. In this work, a symmetry-broken Si–VO 2 composite is studied modulate near-infrared absorption Q-BIC mode. First, L-shaped Si broken C 4v designed, transition from BIC to shows strong circular dichroism. Later,...
The calibration of pH meters including the glass electrode, ISE electrodes,buffers, and general background for are reviewed. Understanding basicconcepts pH, pOH, electrode mechanism is emphasized. New concepts pOH,as well as critical examination activity, activity coefficients given. Theemergence new solid state electrodes replacement salt bridge with aconducting wire have opened up a horizon measurements. A buffer solutionwith conducting may be used stable reference electrode....
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTX-Ray photoelectron spectra of ethylenediaminetetraacetic acid and its metal complexesK. L. Cheng, J. C. Carver, Thomas A. CarlsonCite this: Inorg. Chem. 1973, 12, 7, 1702–1704Publication Date (Print):July 1, 1973Publication History Published online1 May 2002Published inissue 1 July 1973https://pubs.acs.org/doi/10.1021/ic50125a046https://doi.org/10.1021/ic50125a046research-articleACS PublicationsRequest reuse permissionsArticle...
In this paper, the influences of surface plasmons and thermal effects on formation subwavelength periodic ripples Au films irradiated by 800 nm femtosecond laser pulses were studied collinear pump-probe imaging. The spatial temporal resolutions experiment 300 1 ps, respectively. No observed film during ablation first pump pulse, but second pulse appearance transient was evident from a delay time hundreds picoseconds to several nanoseconds. These ripples, however, not retained after...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of Titanium with Cupferron. (Ethylenedinitrilo)tetraacetic Acid as Masking AgentK. L. ChengCite this: Anal. Chem. 1958, 30, 12, 1941–1945Publication Date (Print):December 1, 1958Publication History Published online1 May 2002Published inissue 1 December 1958https://pubs.acs.org/doi/10.1021/ac60144a017https://doi.org/10.1021/ac60144a017research-articleACS PublicationsRequest reuse permissionsArticle Views103Altmetric-Citations14LEARN...
The electron energy band structures and optical properties of silver nickel are notably different, they identified as representative noble common metals, respectively. ultrafast dynamics the formation periodic ripples on surface films induced by a single 800 nm, 50 fs laser pulse was investigated using collinear pump-probe imaging method. dependence transient ripple periods fluences also studied.
The HeI photoelectron spectra of fluoroacetone, 1,1,1-trifluoroacetone, 1,1,1-trichlorotrifluoroacetone, 1,1,3-trichlorotrifluoroacetone, 1,1,3,3-tetrafluoroacetone, 1-chloro-1,1,3,3-tetrafluoroacetone, chloropentafluoroacetone, chloroacetone, and 3-bromo-1,1,1-trifluoroacetone have been determined the vertical ionization energies measured. They compared with calculated by CNDO/2 MO assignments bands made on this basis. A correlation between oxygen lone pair energy number fluorines...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEDTA as Masking Agent in Selective Spectrophotometric Determination of Copper with Triethylenetetramine. An Interpretation Masking.K. L. ChengCite this: Anal. Chem. 1962, 34, 11, 1392–1396Publication Date (Print):October 1, 1962Publication History Published online1 May 2002Published inissue 1 October 1962https://pubs.acs.org/doi/10.1021/ac60191a013https://doi.org/10.1021/ac60191a013research-articleACS PublicationsRequest reuse permissionsArticle...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of Ferrous Oxide in Ferrites.K. L. ChengCite this: Anal. Chem. 1964, 36, 8, 1666–1667Publication Date (Print):July 1, 1964Publication History Published online1 May 2002Published inissue 1 July 1964https://pubs.acs.org/doi/10.1021/ac60214a004https://doi.org/10.1021/ac60214a004research-articleACS PublicationsRequest reuse permissionsArticle Views112Altmetric-Citations8LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRedox Behavior of Cobalt Chelates Nitrilotriacetic AcidK. L. ChengCite this: Anal. Chem. 1958, 30, 6, 1035–1039Publication Date (Print):June 1, 1958Publication History Published online1 May 2002Published inissue 1 June 1958https://pubs.acs.org/doi/10.1021/ac60138a007https://doi.org/10.1021/ac60138a007research-articleACS PublicationsRequest reuse permissionsArticle Views140Altmetric-Citations8LEARN ABOUT THESE METRICSArticle Views are the...
Abstract The prediction and discovery of the existence positron (e+)1-4 positronium atom (Ps)5,6 led rapidly to development a new spectroscopic technique for study structure composition matter. quickly expanded across interdisciplinary from physics chemistry, metallurgy, biochemistry recently superconductors. As an early non-destructive in situ testing tool, annihilation spectroscopy (PAS) has been utilized extensively measure crystal defects.7-9