CAJ | 학술논문

在室温(~30°C)条件下，氯金酸(HAuCl4)均匀混合在粘稠的表面活性剂聚乙烯吡咯烷酮(PVP)胶体(水为溶剂)中， HAuCl4可以被PVP还原，从而形成纳米片。本工作中，通过调整晶体生长条件，成功合成了大量新形貌的单晶金纳米片(厚度数十纳米，尺寸为数个微米)。例如，在晶体生长初期阶段，通过引入温度变化(如降温10-20°C)，形成的金纳米片主要是六角星形，并伴有盾状、内凹外凸的三角状、截角的、三叉的及多台阶等新形纳米片。结合理论计算，阐明了金纳米片的生长机制：在一定条件下，金(111)晶面不仅可以沿着<110>方向生长成为常规的三角或六角纳米片，还可以沿<211>、<321>等不同方向生长成含有更高指数侧面的新形金纳米片。
재실온(~30°C)조건하，록금산(HAuCl4)균균혼합재점주적표면활성제취을희필각완동(PVP)효체(수위용제)중， HAuCl4가이피PVP환원，종이형성납미편。본공작중，통과조정정체생장조건，성공합성료대량신형모적단정금납미편(후도수십납미，척촌위수개미미)。례여，재정체생장초기계단，통과인입온도변화(여강온10-20°C)，형성적금납미편주요시륙각성형，병반유순상、내요외철적삼각상、절각적、삼차적급다태계등신형납미편。결합이론계산，천명료금납미편적생장궤제：재일정조건하，금(111)정면불부가이연착<110>방향생장성위상규적삼각혹륙각납미편，환가이연<211>、<321>등불동방향생장성함유경고지수측면적신형금납미편。
When a sticky gel consisting of an aqueous HAuCl4 solution mixed with poly-vinylpyrrolidone (PVP) surfactant is kept at room temperature (about 30 °C), the HAuCl4 is reduced by the PVP, resulting in the formation of nanostructures. In this study, gold nanoplates with new shapes, which were single crystal ine, several micrometers wide, and tens of nanometers thick, were mass-synthesized by adjusting the crystal growth conditions. For example, through inducing temperature decrease (10-20 °C) in the early stage of crystal growth, the product is dominated by star-like gold nanoplates, together with other new shapes such as shields, concave and convex triangles, corner snipped shapes, triple branched shapes, and shapes that are step-rich in the side plane. Based on theoretical calculations, we present the growth mechanism of these new gold nanoplates. Under certain growth conditions, the (111) plane of the gold crystal can grow not only along the <110> direction into regular triangular or hexagonal nanoplates, but also along other directions such as<211>and<321>, to give new nanoplates with high-index side facets.