TAILIEUCHUNG - Photo-sensitive layers formed from polymethylthiophene/Tio2 nanocomposites

The electrophoretic deposition (EPD) technique was adopted to prepare the nanocomposite films on ITO plates. Then photoelectrochemical properties of the PMT/TiO2 nanocomposite were investigated. Results showed the photo-sensitive properties of TiO2 core (n-type semiconductor), PMT shell (p-type semiconductor) and their n-p junction. | Journal of Chemistry, Vol. 45 (5), P. 634 - 637, 2007 PHOTO-SENSITIVE LAYERS FORMED FROM POLYMETHYLTHIOPHENE/TiO2 NANOCOMPOSITES Received 8 November 2006 Vu Quoc Trung1, Thai Doan Tinh1, Tran Vinh Dieu2, Jiri Pfleger3, Waldfried Plieth4 1 Faculty of Chemistry, Hanoi University of Education 2 Centre of Polymer Research, Hanoi University of Technology 3 Institute of Macromolecular Chemistry, Czech Academy of Sciences 4 Institute of Physical Chemistry and Electrochemistry, Dresden University, Germany SUMMARY Nanocomposites of polymethylthiophene (PMT) and titanium dioxide nanoparticles (TiO2) were prepared in core-shell structure, via chemical oxidative polymerization of methylthiophene in the presence of FeCl3 catalyst. The electrophoretic deposition (EPD) technique was adopted to prepare the nanocomposite films on ITO plates. Then photoelectrochemical properties of the PMT/TiO2 nanocomposite were investigated. Results showed the photo-sensitive properties of TiO2 core (n-type semiconductor), PMT shell (p-type semiconductor) and their n-p junction. I - INTRODUCTION Inorganic nanoparticles of various nature and size can be combined with organic conducting polymers, giving nanocomposites with interesting physical properties and application potentials [1]. Nanocomposites in core-shell structure based on metal oxide core and conducting polymer shell are rather easy to chemically prepare even in large quantities [1]. However, the studies on the electrochemical properties of these materials are not easy because the preparation of the nanocomposite layers on conductive electrodes is very difficult. Hebestreit et al. managed to prepare the polythiophene (PTh)/TiO2 nanocomposite layers on platinum plates by rubbing form pressed pellets [2]. However, the adhesion of the nanocomposite layers on the electrode was bad so that the photocurrent signal of these layers was small (in order of nA). Recently, the electrophoretic deposition (EPD) was adopted 634 for preparation

• Hoá học
• Journal of Chemistry
• Photo sensitive layers formed from polymethylthiophene Tio2 nanocomposites
• Photo sensitive layers formed
• The electrophoretic deposition
• The nanocomposite films on ITO plates
• The PMT TiO2 nanocomposite
• Journal of technology and science education
• Innovative chemistry learning model
• Improving the critical thinking skill
• Self efficacy of pre service chemistry teachers
• Pre service chemistry teachers
• SCT learning model syntax covers
• The Chemistry and Antimicrobial Activity of Psychotria reevesii Wall
• The Chemistry and Antimicrobial Activity
• Psychotria reevesii Wall
• The polar fractions against Staphylococcus aureus
• The relationship between teacher related factors
• Students attitudes towards secondary school chemistry subject
• Bureti district Kenya
• Secondary school chemistry subject
• Click chemistry
• Poly(ethylene glycol)
• Poly(epsilon caprolactone)
• Azide functionalized molecules
• Azide montmorillonite clay
• Block copolymer
• Ketene chemistry
• Telechelic polymers
• Controlled radical polymerization (CRP)
• C60 fullerene
• Metallosupramolecular chemistry
• Host–guest complexes
• Supramolecular chemistry
• Donor–acceptor (D–A)
• Ring opening polymerization
• Thiol benzoxazine reaction
• Catechol based benzoxazine copolymer
• Antibacterial coatings
• Benzoxazine chemistry
• Green chemistry
• Heavy metals
• Cetylpyridinium chloride
• Analytical chemistry
• Journal of Science and Technology
• Green organic synthesis of N methylpyrrolidine
• Gas Chromatography Mass spectroscopy
• The green chemistry process
• Via the green chemistry process
• Journal of medical research
• Production of liophilized quality control samples
• Liophilized quality control samples
• Several clinical chemistry test
• Statistical quality control
• Perspectives on blended learning
• The on line platform
• LabLessons for Chemistry
• Hydrogen and Titration
• College mentors alongside
• Contextualizing technology in the classroom via remote access
• Using space exploration themes
• Scanning electron microscopy
• Tools to promote engagement
• Multidisciplinary geology chemistry experiments
• The service of learning chemistry in Industrial Engineering
• Degrees in Industrial Engineering
• Chemical Engineering and Materials Engineering
• The feed back
• Assessment of achievement in problem solving skills
• General Chemistry course
• Problem based learning
• Measure problem solving skills
• Use of chemistry software to teach
• Assess model based reaction and equation knowledge
• Assess model based reaction
• Two advanced placement
• Public suburban high school
• Collaborative activities for solving multi step problems
• Solving multi step problems in general chemistry
• Solving multi step problems
• The relatve partcipaton of instructor students
• Antioxidant activity
• Bioinorganic chemistry
• Cytotoxic activity
• DNA binding and cleavage activity
• Topoisomerase inhibitor
• Transition metal compounds
• Analytical methods
• Electroanalytical chemistry
• Ionic liquids
• Penicillin allergic patients
• Capillary electrophoresis
• Carbamate SCC interactions
• Fluorescence quenching
• Quantum chemistry calculation
• Inhibition chemiluminescence
• Piperazine chemistry
• Structural features
• Anticancer activity
• Anticancer drugs
• D cyclin dependent kinase
• 3 Amino 9 ethylcarbazole
• Multicomponent reaction
• Arylation reactions
• Cyclization reactions
• Pyrrolo[2 3 c]carbazole
• Prido[3 2 b]carbazole
• Ionic liquid
• Organic phase change materials
• Thermal energy storage
• Solvent free medium
• Silicon chemistry
• Reaction mechanism
• Density functional theory (DFT)
• Homogeneous transitionmetal catalysis
• Silicon analogues
• Medicinal chemistry
• Antiproliferative agents
• Protect endangered tissue
• Anti inflammatory cytokines
• Persistent inflammatory reaction
• Formic acid decomposition
• Renewable feedstock
• Energy feedstocks
• High surface area materials