tailieunhanh - Effect of annealing temperature on the structure, optical and electronic properties of Tio2 made by thermal treatment of Ti

In this work, TiO2 nanocrystalline thin films were obtained through evaporating Ti films by Electron Beam Deposition (EBD) followed by thermal treatment. The deposition speed of Ti thin fims was carried out at nm/s and 1 nm/s. The results show that after annealing at 450˚C for 8 h, the obtained TiO2 thin films have nanoparticle structure with grain size of 20 nm for the Ti thin film deposited at the rate of 1nm/s, whereas at the a deposition rate of nm/s, the TiO2 has a nanorod structure with the rod length of 300 – 400 nm. The influence of thermal annealing on structure of TiO2 films have been investigated and indicated that when annealed at 450˚C for 8 hours, all the Ti films were completely oxidized to form TiO2 films with anatase phase. | Communications in Physics, Vol. 24, No. 2 (2014), pp. 155-162 EFFECT OF ANNEALING TEMPERATURE ON THE STRUCTURE, OPTICAL AND ELECTRONIC PROPERTIES OF TiO2 MADE BY THERMAL TREATMENT OF Ti DANG TRAN CHIEN Faculty of Science, Hanoi University of Natural Resources and Environment PHAM DUY LONG Institute of Materials Science, Vietnam Academy of Science and Technology E-mail: dtchien@ Received 24 February 2014 Accepted for publication 04 April 2014 Abstract. In this work, TiO2 nanocrystalline thin films were obtained through evaporating Ti films by Electron Beam Deposition (EBD) followed by thermal treatment. The deposition speed of Ti thin fims was carried out at nm/s and 1 nm/s. The results show that after annealing at 450˚C for 8 h, the obtained TiO2 thin films have nanoparticle structure with grain size of 20 nm for the Ti thin film deposited at the rate of 1nm/s, whereas at the a deposition rate of nm/s, the TiO2 has a nanorod structure with the rod length of 300 – 400 nm. The influence of thermal annealing on structure of TiO2 films have been investigated and indicated that when annealed at 450˚C for 8 hours, all the Ti films were completely oxidized to form TiO2 films with anatase phase. Whereas, at 700˚C the rutile phase was formed. The band gap of TiO2 thin films decreased with annealing temperature in both doposition rate of Ti thin films. The response of the films annealed at 450˚C presented a faster rise and fall in photocurrent under UV illumination on and off interval. Nanoporous structure TiO2 shows photoelectronic property better than that of nanorod structure. The TiO2 films were used in a photo-electrochemical (PEC) cell as a working electrode and a platinum electrode as a counter electrode. The electrolyte solution contains 1 M KCl and M Na2 S. Keywords: TiO2 thin films, nanoparticle structure, nanorod structure, photo-electrochemical cell. I. INTRODUCTION Titanium dioxide is a material which has attracted lots of attention

• Vật lý
• Communications in Physics
• Annealing temperature on the structure
• Optical and electronic properties of Tio2 made
• Thermal treatment of Ti
• Photo electrochemical cell
• Challenges in particle physics and 3 3 1 models
• Particle physics and 3 3 1 models
• Particle theory and field theory models
• The early Universe
• Non standard model neutrino
• The 3 3 1 models in current particle physics
• Current particle physics
• The Standard Model
• The electro weak
• The process of e+e − → µ +µ
• The randall sundrum model
• Supersymmetric model and unparticle physics
• Randall Sundrum model
• Supersymmetric and Unparticle physics
• Handbook of mechanical engineering
• mechanical engineering
• mechanical design
• mechanical materials
• alloy materials
• Energy Technology
• Compact device model for nanoparticle organic memory transistor’s characterization
• Nanoparticle organic memory transistor
• Hybrid integrated circuit
• Hybrid NOMFET CMOS neuromorphic computing circuit
• Microdroplet in T junction microfluidic system
• Experiment and simulation
• T junction microfluidic system
• Lateral channel decrease
• Optical bistability in three level eit configurations
• Three level eit configurations
• Effects of atomic coherence
• OB in V type system
• Dynamical codimension 2 brane
• Warped six dimensional space time
• Codimension 2 brane
• Warped 6D bulk space time
• Coherent diffractive imaging using table top high harmonic generation
• Coherent diffractive imaging
• Table top high harmonic generation
• Growth of single crystals of methylammonium lead mixedhalide perovskites
• Growth of single crystals
• Methylammonium lead mixedhalide perovskites
• Organo lead mixed halide perovskites
• Tuning electronic transport properties
• Zigzag graphene nanoribbons
• Stone wales defect
• Negative differential resistance
• Asymmetric and symmetric ZGNRs
• The transmembrane italian mutant
• The temperature replica exchange molecular dynamics
• TmE22K trimer structure
• Kinetics probably yield
• Electrochemical fabrication of hybrid plasmonic dielectric nanomaterials
• Gold diamond clusters
• Hybrid plasmonic dielectric nanomaterials
• hybrid plasmonic dielectric materials
• Electron microscopy and optical characterization
• X ray absorption fine structure
• BCC crystals studied
• High order expanded debye waller factors
• Debye Waller factors
• Temperature dependent cumulants
• Nonlinear optics in waveguide arrays and photonic nanowires
• Nonlinear optics in waveguide arrays
• Diffractive resonant radiation
• The spectral body of the pulse
• Radion production in high energy photon collisions
• Solve the hierarchy problem
• Energy loss function for lead
• Local field effect
• Adiabatic local density approximation
• First principles calculations shows good agreemen
• Perturbative nonlinear optics in the extreme ultraviolet region
• The extreme ultraviolet region
• Different extreme ultraviole
• Multiple cycle pulses
• Thermodynamic hadron quark phase transition
• Chiral nuclear matter to quark gluon plasma
• Quark gluon plasma
• Equilibrium properties near critical points
• Phase transitions and critical phenomena
• Chirality of light in hybrid modes
• Vacuum clad ultrathin optical fibers
• Ultrathin optical fibers
• Superchiral outside the fiber
• An advanced logarithmic phase mask for extending depth
• Field of hybrid optical systems
• Modulation transfer functions
• Hybrid imaging system
• Hyperon W production in pp collisions at energy 8 tev
• Investigate the hadronization process
• The RICH detector
• The nominal value
• Profile of the 12co(3 2) emission line detected
• The debris disc of 49 ceti
• Require relatively violent
• Generate secondary gas
• Synthesis and optical characterization
• Building block plasmonic gold nanostructures
• Random nano islands
• Random Au nano islands
• Electrochemical performance of Na0
• 44Mno2 synthesized
• Hydrothermal method using as a cathode material
• Sodium ion batteries
• Sodium ion battery
• Stable during cycling