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RISS 인기검색어
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- 저자 : VU THANH CONG (검색결과 3 건)
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Preparation of Pea-Pod Structure Based on Silica Nanotube and Nanoparticles
VU THANH CONG 가천대학교 대학원 2013 국내석사
Abstract Peapod structure has drawn a great attention since it was first discovered. This kind of structure prevents nanoparticles (NPs) overlapping and helps enhance the strongest effectiveness of NPs embedded inside silica nanotube (SNT). Also, it allows the biggest NPs to come in SNT. A novel method to fabricate nanopeapod based on SNT and NPs has been investigated. Nanoparticle-embedded silica nanotube peapods (SNTPs) could be controlled in different structure including linear, zig-zag, and double line in nano array. In this work, many kinds of NPs have been introduced into SNTs successfully including gold nanoparticles ( AuNPs), upconversion phosphor nanoparticles ( UCPNs), gold nanorods ( Au NRs), magnetic nanoparticles ( MNPs). AuNPs embedded in SNT create more or less than one nm and yielded extremely strong electric field for Surface-enhanced Raman scattering (SERS) to apply for pH sensor potentially.
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Vu, Thanh Cong 중앙대학교 대학원 2017 국내박사
Well-controlled one-dimensional nanoparticles (1D NPs) or nanopeapods have diverse applications in materials science, nanotechnology, and physical chemistry. There are several ways to fabricate nanopeapods based on templated and template-free methods. Precise control of the continuously stable chain, and geometrical align of nanopeapods in uniform length chains are required for successful peapod designs. It is more necessary to consider the peapod chains contain various materials for their multifunctional properties. Among nanomaterials, noble metal nanoparticles show great attention because of their plasmonic and sensitive properties. In this work, gold nanoparticle peapod is fabricated inside silica nanotubes (SNTs) via solvent evaporation assisted capillary force. SNTs are used not only as the template, but also as the drug carrier material. The silica gold nanopeapod offers a novel multifunctional nanostructure for advanced Raman sensing and cancer therapy. The thesis is composed of five chapters. The beginning chapter is the introduction of silica nanotubes, nanopeapods, and their recent applications. The second chapter presents doubly open-ended silica gold nanopeapod fabrications and their application for three-dimensional surface-enhanced Raman scattering (3D SERS) substrate. Doubly open-ended silica nanotubes (DSNTs) are originally fabricated inside an AAO template by reactive ion etching (RIE). The continuous RIE treatment of Argon and CHF3 plasma can selectively remove the silica at the bottom to make doubly open-ended tubes. AuNPs’ embedded DSNTs show strong SERS intensity and highly potential applications for 3D SERS substrate to detect pesticide residues and drugs. The limit of detection of acetamiprid and benzocaine by the substrate are 5.10-17 M and10-15 M, respectively. After doubly open-ended silica gold nanopeapods, the third chapter discusses the factors affecting the nanopeapod formation, proposed mechanisms, and optimal conditions to apply for several kinds of nanopeas including metal, non-metal, and fluorescence with different sizes and shapes. This study offers insights for mono and multiple nanopeapod fabrications which have highly potential applications in many fields such as biomedical, nanosensing, energy storage, and solar cell technologies. The rest of the thesis discusses silica-caged gold nanoparticle dimers (SGDs) for cancer therapy. SGDs host two AuNPs which are assembled through the single insertion process. Because of only a single nanogap junction (0.49±0.06 nm) between the dimer AuNPs , SGD shows a consistency to SERS intensity. Since the lengths are as short as ~100 nm, a mitochondria-targeting moiety of triphenylphosphonium could be attached on SGDs to have multi-functionalities of mitochondria pH monitoring, photo-thermal therapy, and targeted anticancer drug delivery.
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Vu Thanh Con 영남대학교 박정희새마을대학원 2018 국내석사
베트남의 대기 질 지수는 세계에서 가장 낮은 수치 중 하나다. 대기 환경의 질을 조사한 180 개국에서 베트남의 대기 질 성능 지수는 131위를 차지했다. 다른 지역과 비교할 때 하노이는 베트남에서 가장 오염 된 도시로 간주된다. 정부와 시청은 오염을 줄이기위한 정책과 연구를 수행해 왔지만 지금까지 하노이의 대기 오염 상황은 개선되지 않았다. 따라서이 이논문의 목적은 대기 오염 수준, 대기 질 관리에 관한 기존 정책의 상태를 평가하고 하노이의 대기 환경을 개선하는 해결책을 찾는 것이다. 이 논문에서 사용 된 연구 방법에는 적절한 해결책을 제공하기위한 기초 자료 인 2차 데이터, 사례 연구 및 전문가 심층 인터뷰가 포함된다. 세계 여러 도시의 대기 질 관리에 관한 문헌 검토 그리고 하노이의 실제 상황과 심층 인터뷰의 결과를바탕으로 평가한후, 이눈문이 오염의 주요 원인은 교통이고, 그리고하노이의 대기 질 관리의 한계는 불완전한 법률정책, 빈약하고 뒤떨어지는 대기 질 모니터링 시스템, 비능률적인 정책 및 자원과 같은 핵심 요소의 영향으로 인해 되는것을 찾아냈다. 결과적으로, 논문의 마지막 부분은 하노이의 대기 질을 개선하기위한여러 일반적인 정책과 구체적인 정책을 제안했다. Vietnam's air quality index is one of the lowest in the world. In the 180 countries surveyed for the quality of the air environment, Vietnam's air quality performance index is ranked # 131. Compared to other regions, Hanoi - the capital city is considered as the most polluted city in Vietnam. The government, as well as the city council has been implementing policies and research to reduce pollution, but so far, the air pollution situation in Hanoi has not improved.Therefore, the purpose of this thesis is to assess the level of air pollution, the current status of existing policies on air quality management and to find solutions that are sustainable and appropriate to improve the quality of the air environment in Hanoi.The research methods used in this thesis include secondary data, case study and expert depth-interview as the basis for providing appropriate policy solutions.Based on the literature review on air quality management in many cities around the world, the actual situation in Hanoi and the results of in-depth interviews, it shows that transportation is aprimary source of pollution; and the limitations of air quality management in Hanoi are due to the weakness of key elements such as complete legislation, air quality monitoring system, effective policy and resources.As a result, final part of thesis has suggested the general policies and more specific policies and methods to improve air quality in Hanoi.
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