TAILIEUCHUNG - Synthesis of CdSe/CdS and CdSe/CdS/SiO2 nanoparticles via wet chemical method

This work presents the synthesis of CdSe/CdS and CdSe/CdS/SiO2 nanoparticles via wet chemical method for the purpose of preparing fluorescence SiO2 nanoparticles. The CdSe/CdS nanoparticles have been synthesized directly in an aqueous solution using citrate as the surfactant agent. | JOURNAL OF SCIENCE OF HNUE DOI Mathematical and Physical Sci. 2015 Vol. 60 No. 7 pp. 75-80 This paper is available online at http SYNTHESIS OF CdSe CdS AND CdSe CdS SiO2 NANOPARTICLES VIA WET CHEMICAL METHOD Chu Viet Ha1 Hoang Thi Hang2 Nguyen Thi Bich Ngoc3 Ngo Thi Huong1 Vu Thi Kim Lien1 and Tran Hong Nhung3 1 Faculty of Physics Thai Nguyen University of Education 2 Faculty of Physics Hanoi National University of Education 3 Institute of Physics Vietnam Academy of Science and Technology Abstract. This work presents the synthesis of CdSe CdS and CdSe CdS SiO2 nanoparticles via wet chemical method for the purpose of preparing fluorescence SiO2 nanoparticles. The CdSe CdS nanoparticles have been synthesized directly in an aqueous solution using citrate as the surfactant agent. The CdSe CdS nanoparticles are then coated by a silica shell using tetraethylorthosilicate TEOS and aminopropyltriethoxysilane APTEOS as precursors and ammonium hydroxide as the catalyst. The size of the nanoparticles can be controlled by synthesis conditions. The CdSe CdS nanoparticles in citrate aqueous solution have strong intensity of emission high photostability and quantum yield that is suitable for biological applications. The emission intensity of SiO2 coated quantum dots is remarkable. The CdSe CdS quantum dots-based fluorescence silica nanoparticles exhibit a photostability for a long time during storage. The results show that SiO2 coated quantum dots CdSe CdS SiO2 nanoparticles can be used as biomarkers. Keywords CdSe CdS quantum dots citrate CdSe CdS SiO2 nanoparticles Stober method optical properties. 1. Introduction Semiconductor colloidal nanoparticles quantum dots have emerged as a new class of fluorescent probe for in vivo biomolecular and cellular imaging because they are highly photo-stable with broad absorption spectra narrow size-tunable emission spectra remarkably resistant photobleaching can span the light spectrum from the

• Hoá học
• Chemical science
• Biological science
• CdSe/CdS quantum dots
• CdSe/CdS/SiO2 nanoparticles
• Stober method
• Optical properties
• Journal of technology and science education
• Design for survey skills in chemical engineeringe
• Analysis of questionnaires for survey skills in chemical engineering
• Survey skills in chemical engineering
• The chemical engineering learning outcomes
• chemical analysis
• the overall chemical analysis
• chemical analysis of materials
• International Journal of Computer Science and Telecommunications
• Physical and chemical properties affected by temperature
• Copper films chemical mechanical polishing
• The highest removal rate
• Copper CMP process
• Lecture Meat science and Meat processing
• Meat science and Meat processing
• Chemical composition of meat
• Structure of meat
• Composition of triglyceride
• Conservation Science
• Teaching Series
• Atomic structure
• chemical bonding
• chemical equations
• Beginning chemistry
• chemical kinetics fundamentals and new developments
• Summary of Dissertation for a Doctoral degree
• Educational Science
• Method of teaching Chemistry
• Developing problem solving capacity
• Organic chemical
• High School Education
• Preparation Techniques
• Analytical Chemistry
• In this workbook
• experiments are elaborated using small scale glassware and equipments from a Small Lab Kit
• developed at the Department of Chemistry
• Faculty of Science
• Chulalongkorn University in Thailand
• This Small Lab Kit was created as a result of the research project entitled “Chemistry Laboratory Based on Chemical Safety and Pollution Minimization” sponsored by Thai Research Fund (RDG 3 07 2543)
• One of the outcomes of this project is the organic laboratory book entitled “Organic Chemistry Laboratory Based on Chemical Safety and Pollution Minimization” written in Thai by professors from 7 universities in this project
• They compiled
• adjusted and tested the experiments taken from several traditional organic chemistry laboratory books using the prototype of Small Lab Kit
• Currently
• some selected experiments from this Thai organic chemistry laboratory text have further been modified
• rewritten and edited in English as appeared in this workbook
• Some experiments ar
• thuật ngữ môi trường
• khoa học môi trường
• xử lý chất thải
• quản lý môi trường
• ô nhiễm môi trường
• Vietnam Journal of Science and Technology
• Initial study on chemical constituents
• Chemical constituents of bischofia javanica
• Bischofia javanica Blume leaves
• Jasmonic acid derivative
• Journal of Science and Technology
• Chemical components of some seaweed species
• Con Co island
• Quang Tri province
• The chemical compositions
• The chemical constituents of ricinus communis
• The chemical constituents
• D NMR spectroscopic methods
• The Ricinus communis
• Agricultural science
• Biological chemical
• Antioxidant activities
• Biological and chemical changes
• Acetic acid productivity
• Fermented tea
• Physico chemical properties
• Yoghurt containing cress seed mucilage
• Cress seed mucilage
• Ocean Science
• Reference Materials
• Inorganic Carbon
• Carbon Isotopes
• Methods Employed
• Community Participation
• CHEMICAL OCEANOGRAPHIC
• Chemical compounds
• covalent
• acid base catalysis
• glucose
• hemiacetal
• Litsea glutinosa
• Chemical composition
• natural sciences
• science and technology
• scientific reports
• research projects
• scientific research
• science books
• environmental pollution
• wastewater treatment
• Ecological Modeling
• Chemical Effects
• Ecosystems
• wastewater
• Quantity Water
• biological
• chemical
• physicall
• Plant Science
• Determination
• Volatile Oils
• Superheated Water
• Extraction
• Analytical Capabilities
• Pollution Control
• Process Advances
• Human Influence
• Aerosol Formation
• Chemical education
• Legitimation of chemistry teaching
• Didactics of chemistry
• Giáo dục Hóa học
• Ý nghĩa của dạy học Hóa học
• Phương pháp dạy học Hóa học