A5008576294- Surface Chemistry and Catalysis
- Molecular Junctions and Nanostructures
- Surface and Thin Film Phenomena
- Force Microscopy Techniques and Applications
- Electrochemical Analysis and Applications
- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Spectroscopy and Quantum Chemical Studies
- Advancements in Battery Materials
- Advanced Chemical Physics Studies
- Inorganic Fluorides and Related Compounds
- Porphyrin and Phthalocyanine Chemistry
- Nanopore and Nanochannel Transport Studies
- Advanced Battery Materials and Technologies
- Molecular Sensors and Ion Detection
- Electron and X-Ray Spectroscopy Techniques
- Graphene research and applications
- Crystallization and Solubility Studies
- Quantum Dots Synthesis And Properties
- Nanocluster Synthesis and Applications
- Organic Light-Emitting Diodes Research
- Electrostatics and Colloid Interactions
- Gold and Silver Nanoparticles Synthesis and Applications
- Aluminum toxicity and tolerance in plants and animals
- Thin-Film Transistor Technologies
Guangxi Normal University
2014-2020
Honda (United States)
2006-2018
Honda (Japan)
2007-2013
Indiana University – Purdue University Indianapolis
2010
University of Washington
2005-2008
Mississippi State University
2007
Chinese Academy of Sciences
1998-2006
Institute of Chemistry
1998-2005
Institute of Mechanics
2003
Tohoku University
2001-2002
Working toward fluoride batteries Owing to the low atomic weight of fluorine, rechargeable fluoride-based could offer very high energy density. However, current need operate at temperatures that are required for molten salt electrolytes. Davis et al. push can room temperature, through two advances. One is development a room-temperature liquid electrolyte based on stable tetraalkylammonium salt–fluorinated ether combination. The second copper–lanthanum trifluoride core-shell cathode material...
High-efficiency polymer light-emitting diodes were fabricated by spin-coating a layer of neutral surfactant on top the poly[2-methoxy-5-(2′-ethylhexyloxy)-1,4-phenylenevinylene] electroluminescent (EL) to facilitate electron injection through high-work-function aluminum cathode. The external luminous efficiency device can reach 3.59 cd/A, which is higher than control (1.89 cd/A) using calcium as It was found that when combination and used cathode abundant hole-injection hole-transporting...
A self-assembled monolayer of l-cysteine was prepared on Au(111) under potential control. Cyclic voltammetry and in situ electrochemical scanning tunneling microscopy were employed to investigate the molecular adsorption adlayer structure perchloric acid solution. The molecules chemically adsorb form a well-defined adlayer. new (4 × √7)R19° observed double-layer region. phase transition at positive region resulted appearance disordered layer. structural model is proposed interpret registry...
In situ electrochemical scanning tunneling microscopy was used to study the coarsening of platinum nanocrystals under potentiostating and dissolution through potential cycling. A rapid observed for in double-layer region. No obvious crystal size changes were oxidation-reduction region hydrogen-adsorption proton-oxidation The is proposed as a variant Ostwald ripening, whereby dominant process potential-induced surface-diffusion transport. Additionally, cycling causes not only surface result...
Self-organized monolayer domains of liquid crystal (LC) on mica surface were investigated by contact mode atomic force microscopy (AFM) and friction (FFM). By analyzing contributions to the apparent height in AFM images, we calculated forces relevant coefficients. It is observed that difference between magnitude LC monolayers was proportional normal load. The coefficients bare obtained as 0.076 0.094, respectively. In addition, frictional asymmetry our study, which attributed molecular tilt,...
Pricking the surface of chirality: The chirality (R)- and (S)-2-phenylpropionamide molecules has been directly observed on Cu(111) in solution by using electrochemical scanning tunneling microscopy (see images). Around chiral center, methyl CONH2 groups maintain configuration, although R S adsorb onto same (4×4) symmetry array.
In situ electrochemical scanning tunneling microscopy is used to study the coarsening of platinum islands at potentials 0.4, 0.5, and 0.6 V in double-layer region. Several interesting surface island reconstruction processes were observed, namely, (1) growth small polycrystalline islands; (2) shape- size-limited growth; (3) accompanied by disappearance nearby islands. It evident that these potential-induced can be explained Gibbs-Thomson theory as a variant Ostwald ripening. Details are...
The adsorption mode of cinchonidine on Cu(111) was directly obtained by in situ STM. molecules were found to adsorb the substrate surface and form a long-range ordered adlayer with (4 x 4) symmetry. While quinoline rings lie parallel Cu(111), chiral quinuclidine moiety extends out surface. enantioselectivity catalysts may relate this special conformation
Adsorption of pyridine, pyrazine, and triazine molecules on a Cu(111) electrode surface was studied in aqueous solution by using cyclic voltammetry electrochemical scanning tunneling microscopy (STM). High-resolution STM imaging reveals the details adlayer structures internal structure individual molecules. The are found to form long-range well-ordered adlayers. same (3 × 3) with coverage 0.11 observed three All adopt flat-lying orientation double-layer potential region, although adsorption...
The effect of chemically modified tips on STM imaging was investigated. An electrochemical technique used to prepare a monolayer sulfur and iodine the apex tips. were first employed image 1-octadecanethiol (1-C18H37SH) adlayer highly oriented pyrolytic graphite (HOPG) surface. images acquired with S-modified could ascertain structural detail thiol groups adsorbed molecules, while that I-modified appeared in low resolution. contrast variations are attributed changes electronic states
The adsorption of enantiomers and a racemic mixture tyrosine (tyr) on Cu(111) has been investigated by cyclic voltammetry electrochemical scanning tunneling microscopy. d-tyr l-tyr molecules adsorb show (4 × 4) structure. mirror symmetry between two adlayers is demonstrated high-resolution microscope images. spontaneous separation racemate into homochiral domains observed. result presented here hoped to supply direct evidence for the chiral adlayer ordering at solid/liquid interface.
A novel self-assembling molecule with coplanar anthraquinonyl and anthryl moieties linked by an acetylenic unit has been designed synthesized as electron acceptor for efficient photocurrent generation. The high-resolution scanning tunneling microscopy (STM) images showed that the self-assembled monolayer (SAM) of this forms highly ordered two-dimensional (2D) arrays on Au(111) oblique lattice graphite-like stacking at room temperature. electrochemical study its SAM Au reversible...
Self-assembled monolayers (SAMs) of large pi-conjugated aromatic thiols, 1-mercaptopyrene (MP), 6-mercaptobenzo[a]pyrene (MBP), and 1-(11-mercaptoundecyl)pyrene (MUP), prepared on Au(111) substrate at different temperatures were investigated by scanning tunneling microscopy. At room temperature, only MP MBP molecules formed well-ordered SAMs with [Formula: see text] ([Formula: text]) Rect symmetry, respectively. In contrast, MUP adsorbed randomly the surface. elevated temperatures, all three...
Controlled assemblies of the n-type 5,6,11,12,17,18-hexaazatrinaphthylene (HATNA) molecule and its derivatives, 5,6,11,12,17,18-hexaazatrinaphthylene-2,8,14-tricarboxylic acid (HATNA–COOH) 2,8,14-tri(3,4,5-tridodecyloxyphenylaminocarbonyl)-5,6,11,12,17,18-hexaazatrinaphthylene (HATNA-den), on Au(111) electrodes have been investigated using electrochemical scanning tunneling microscopy (ECSTM). Orientations HATNA HATNA–COOH molecules can be manipulated with potential modulation imaged in situ...
Scanning tunneling microscopy (STM) has been employed to study the organization of photosynthetic bacteria. A high-resolution spatial image is acquired on a bacteriochlorophyllide c (BChlide c) monolayer prepared by simple method. BChlide molecules are found self-organize well-defined adlayer highly oriented pyrolytic graphite (HOPG) surface. dimeric structure different from those observed in Chls a, and d first revealed adlayer. hydrogen bond assumed exist dimer between OH groups at C31 positions.
Triptycene molecular orientation has been tuned with a STM tip at Cu(111) surface in solution from flat, to tilt, vertical. The tuning is completely bias dependent and reversible. study important the fields of nanoscience technology.
Scanning tunneling microscopy (STM) combined with cyclic voltammetry has been employed to investigate the adsorption of cinchonine on Cu(111). Similar cinchonidine, forms a long-range ordered adlayer (4 × 4) symmetry substrate. The structural details molecular were obtained by high-resolution STM images. On basis previous results and images, quinoline ring is proposed lie parallel Cu(111) serve as an anchoring group. chiral quinuclidine moiety extends out surface facilitate interaction...
Abstract The adlayer structure of 1‐octadecanethiol (1‐C 18 H 37 SH) is investigated by scanning tunnelling microscopy (STM) with bare and chemically (I S) modified Pt/Ir tips. molecules were observed to form a well‐ordered self‐assembly monolayer on highly oriented pyrolytic graphite. alkyl chains clearly imaged S‐modified tip was found be effective reveal the structural details thiol groups (SH). Based STM results theoretical calculations, model for proposed. Copyright © 2001 John Wiley...