초록문의 abstract@kcsnet.or.kr

결제문의 member@kcsnet.or.kr

현재 가능한 작업은 아래와 같습니다.
  • 09월 11일 00시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

대한화학회 제124회 학술발표회 및 총회 Nanocrystal Conversion Chemistry within Nanosilica Confinement

2019년 8월 22일 06시 45분 22초
KCS4-3 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
수 16시 : 00분
KCS - [IBS Symposium] Dynamic Soft and Living Matter
저자 및
In Su Lee
Department of Chemistry, Pohang University of Science and Technology, Korea
The extensive research performed in the past two decades has enabled to produce a range of colloidal nanocrystals mostly through solution-based procedures that generate and transform nanostructures in bulk-phase solutions containing precursors and surfactants. Unlike well-established solution-based methods, solid-state reactions, which had been at the forefront of traditional inorganic materials chemistry, are quite rarely utilized in the realm of nanomaterials; this is because of the high temperatures required for most of the solid-sate reactions, the clusters and NCs are prone to migrate through bulk reaction medium and sinter together into uncontrollable large particles. We have been pursuing the "nanospace-confined approach” to explore the use of nano-sized solid-state reaction media to carry out the syntheses and transformations of nanocrystals in a unique microenvironment; partitioning the reactants, intermediates and transition states from rest of the bulk reaction media. Such nano-confined systems have potential not only to enable efficient and selective nanocrystal-conversion chemistries but also to provide fundamental understanding pertaining to the synthetic evolution of nanostructures and transient mechanistic steps. Unique few tens of nanometer-space inside nano-confined systems offers the opportunity to observe and elucidate novel deconvoluted chemical phenomena that are impossible to investigate in bulk systems; and, comprehensive understanding of nano-confined chemistry can be implicated in explaining and controlling the macroscopic chemical behaviors. In this presentation, I will discuss the key examples of “nanospace-confined solid-state conversion approach”, which involve the novel reactions of nanocrystals within a thermally stable solid silica nanospheres to synthesize and transform complex hybrid nanocrystals with increased complexity and functionality.