Synthesis and Simulation Study of Right Silver Bipyramids via Seed‐Mediated Growth cum Selective Oxidative Etching Approach

摘要

Abstract > In this study, a simple method to synthesize right silver bipyramid (AgBP) nanostructures via the seed‐mediated growth cum oxidative etching approach in aqueous solution is developed. The key strategy of this method is to control the growth and etching process by careful adjustment of the reactants concentration. Ascorbic acid (AA) is used to reduce silver precursor while cetyltrimethylammonium bromide stabilizer is used to direct the preferential growth of (100) facets. The presence of Cu 2+ and AA in the reaction mixture also enable in‐situ generation of H <sub>2</sub> O <sub>2</sub> , leading to selective etching of (111) facets, which is crucial to the formation of anisotropic AgBPs. The structure‐properties of AgBPs is systematically investigated through a series of experiments and theoretical simulations. Transmission electron microscope images and X‐ray diffraction patterns of the as‐synthesized AgBPs show the formation of single crystalline twined nanostructures with a relatively high yield. These results suggest the important role of the excitation of electric dipole in enhancing the electric field at the six sharp corners of AgBPs, making them especially promising for a wide range of technological applications including surface‐enhanced Raman scattering with a significant enhancement factor of 1.50 × 10 5 as demonstrated herein. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“Main”XML：Lang =“en”> <标题类型=“main”>抽象</ title> > 在该研究中，开发了一种简单的方法，通过在水溶液中通过种子介导的生长氧化蚀刻方法合成右银脂酰胺（AGBP）纳米结构。该方法的关键策略是通过仔细调整反应物浓度来控制生长和蚀刻过程。抗坏血酸（AA）用于减少银前体，同时使用甲烷基三甲基溴化铵稳定剂来指导（100）个小平面的优先生长。 Cu的存在 2 + </ sup> 反应混合物中的AA也能够原位产生H. <sub> 2 </ sub> O. <sub> 2 </ sub> ，导致选择性蚀刻（111）个小平面，这对于形成各向异性Agbps至关重要。通过一系列实验和理论模拟系统地研究了AGBP的结构性质。透射电子显微镜图像和X射线衍射图案的AS合成的AGBPS显示出具有相对高产率的单晶缠绕纳米结构的形成。这些结果表明了电偶极电极激发在增强AGBPS的六个尖角中的电场中的重要作用，使其特别承诺，具有各种技术应用，包括表面增强的拉曼散射，具有1.50×的显着增强因子。 10. 5 </ sup> 如本文所示。 </ p> </摘要> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" > 著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-28901/'>《Particle & Particle Systems Characterization: Measurement and Description of Particle Properties and Behavior in Powders and Other Disperse Systems 》</a> <b style="margin: 0 2px;">|</b><span>2020年第5期</span><b style="margin: 0 2px;">|</b> <span>共9页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li> <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span> <a href="https://www.zhangqiaokeyan.com/clc/6960.html" title="特种结构材料">特种结构材料 ;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=anisotropic morphology&option=203" rel="nofollow">anisotropic morphology;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=controlled crystal growth&option=203" rel="nofollow">controlled crystal growth;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=oxidative etching&option=203" rel="nofollow">oxidative etching;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=seed‐mediated growth&option=203" rel="nofollow">seed‐mediated growth;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=silver nanostructures&option=203" rel="nofollow">silver nanostructures;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=surface‐enhanced Raman scattering&option=203" rel="nofollow">surface‐enhanced Raman scattering;</a> </p> <div class="translation"> 机译：各向异性形态;控制晶体生长;氧化蚀刻;种子介导的生长;银纳米结构;表面增强拉曼散射; 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