Abstract:
2단계가열공정을통하여균일한나노구조체의다중층형태의니켈-기반배위폴리머입자(mL-NiCPPs)를성공적으로제조하였고, 이입자의크기를줄임으로써표면적을더 크게하기위해성장공정에서크기조절제로서피리딘과아세트산을가하였다. 그결과물로얻어진배위폴리머나노입자는제어된온도에서하소하여규칙적인다중층형태와높은결정도를나타내는니켈산화물나노구조체(mL-NiOs)를제조하였다. 또한, mL-NiOs의 BET 데이타는잘 제어된동공크기(10 nm)와비교적높은표면적(112 m/g)을나타내어다양한응용가능성을보여주었다. 합성된 mL-NiOs는요소탐지를위해우레아제고정용으로효과적인기질로서작용하는 ITO 전극상에성공적으로증착시켰다. 이와같이제조된바이오전극(Ur/NiO/ITO/glass)은순환전류(CV)를이용하여요소센싱에이용할수 있다. 제조된전극은높은민감도를나타내었고, 요소농도와전류간에직선상관관계를나타내었다.
Abstract:
A highly spherical nanoparticle (Multi-Au@SiO2NPs) comprising a core of multiple gold nano dots and a silica shell is synthesized through a method on the basis of reverse micro emulsion (water-in-oil emulsion). The micro emulsion is manufactured by mixing a nonionic surfactant, non-polar solvent, and a cationic gold precursor aqueous solution. The multiple gold nano dots having around 5 nm of a maximum grain diameter could be collected in a silica matrix in a growth process. The size of Multi-Au@SiO2NPs and the number of gold nano dots included thereof can be controlled by adjusting a ratio of water with respect to the surfactant and the amount of the cationic gold precursor. The method is a novel and simple synthetic method for generating gold-silica hybrid nano material by collecting the multiple gold nanoparticles within the silica matrix.
Abstract:
A one-dimensional bipyramid gold nanocrystal was successfully synthesized through a seed-medium method using cetyltrimethylammonium chloride (CTAC) functioning as a surface stabilizing agent and a shape-directing agent, gold nanoparticle seed, Ag cation, and a reducing agent. When an optimum amount of Ag cation is added, this had a decisive influence on manufacturing sharp-edge bipyramid gold. The length of the synthesized bipyramid gold and the optical characteristic was precisely controllable by changing the amount of salycilate added during synthesizing. Rod-like micelle each having different shape and strength manufactured using aqueous solutions of cetyltrimethylammonium-salycilate mixture functions as an effective flexible mold or a structure-directing agent in one-dimensional nanocrystal synthesization having different lengths. The present invention shows how to control the one-dimensional bipyramid gold nanocrystal synthesized by changing the parameter of the rod-like micelle acting as a flexible mold during synthesizing.