학술논문
0, 2차원 기능성 나노 소재의 합성과 적용 분야 / Synthesis and Applications of 0 and 2 Dimensional Functional Nanomaterials
Document Type
Dissertation/ Thesis
Author
Source
Subject
Language
Korean
Abstract
I. Organo-Soluble Chemically Reduced Graphene Oxide Due to the extraordinary electrical, thermal, and mechanical properties recently graphene-based nanomaterial has received great research interests. Covalent or noncovalent approach leading to solubilization of chemically reduced graphene oxide (rGO) is typically attempted in various solvents using different molecules. While noncovalent approach showed many advantages for practical applications, organic soluble rGO/polymer assembly has not been reported because aqueous medium is widely used in noncovalent approach. In this report, rGO with semiconducting polymer was prepared through simple noncovalent approach which showed excellent solubility in organic medium. As polyfluorene contains ionic pendent group, so it has been choice as target semiconducting polymer because chare repulsion might be factor for the stabilization of rGO/polyfluorene assembly in organic medium.
II. Solvent Exfoliated Fluorescent Black Phosphorus Quantum Dots Nano sized Black phosphorus quantum dots (BPQDs) is a class of two dimensional black phosphorus nanomaterials showed exceptional luminescence and physicochemical properties which makes them promising candidates for high-performance optoelectronic devices. The obtained tiny sized BPQDs produced by the liquid-phase exfoliation of BP crystal that provides a range of sizes from 3 to 15 nm, with high photoluminescence quantum yield (PLQY) of 5%. Furthermore, by simple surface functionalization of BPQDs with catechol-grafted polyethylene glycol (PEG) afforded water soluble blue-emitting BPQDs, showing very low cytotoxicity together with excellent cellular imaging capability.
II. Solvent Exfoliated Fluorescent Black Phosphorus Quantum Dots Nano sized Black phosphorus quantum dots (BPQDs) is a class of two dimensional black phosphorus nanomaterials showed exceptional luminescence and physicochemical properties which makes them promising candidates for high-performance optoelectronic devices. The obtained tiny sized BPQDs produced by the liquid-phase exfoliation of BP crystal that provides a range of sizes from 3 to 15 nm, with high photoluminescence quantum yield (PLQY) of 5%. Furthermore, by simple surface functionalization of BPQDs with catechol-grafted polyethylene glycol (PEG) afforded water soluble blue-emitting BPQDs, showing very low cytotoxicity together with excellent cellular imaging capability.