首页> 外文期刊>Journal of Applied Polymer Science >Size-controlled gold nanoparticles inside polyacrylamide microgels
【24h】

Size-controlled gold nanoparticles inside polyacrylamide microgels

机译:聚丙烯酰胺微凝胶内部尺寸可控的金纳米颗粒

获取原文
获取原文并翻译 | 示例
           

摘要

Gold nanoparticles (AuNPs) of different sizes were synthesized into a crosslinked network of polyacrylamide (PAAm) microgels. PAAm was prepared by means of semicontinuous inverse heterophase polymerization under monomer-starving conditions with a z-average particle size of 384 +/- 18nm. AuNPs with controlled size were obtained by a reduction reaction of Au+3 to Au-0 from a gold(III) chloride trihydrate (HAuCl4) solution inside microgel the crosslinked network (AuNP-PAAm). The reduction reaction was verified for 2h by ultraviolet-visible spectroscopy (UV-vis). AuNP-PAAm exhibited a particle size between 288 +/- 12 and 230 +/- 15nm at HAuCl4 concentrations of 0.4 and 1.3mM, respectively. The AuNP-PAAms were observed by transmission electron microscopy, and their sizes were determined to be 19 +/- 2nm (1.3mM) and 17 +/- 2nm (1.1mM). With UV-vis spectroscopy, we detected the formation of AuNPs at a wavelength of 552nm, and with X-ray diffraction analysis, we proved that the crystal arrangement was face-centered cubic. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43560.
机译:将不同大小的金纳米颗粒(AuNPs)合成为聚丙烯酰胺(PAAm)微凝胶的交联网络。在单体匮乏的条件下,通过半连续逆异相聚合制备PAAm,其z平均粒径为384 +/- 18nm。通过在交联网络(AuNP-PAAm)的微凝胶内部从三水合氯化金(HAuCl4)溶液中Au + 3还原成Au-0到Au-0,可得到尺寸受控的AuNP。通过紫外可见光谱法(UV-vis)验证还原反应2小时。在HAuCl4浓度为0.4和1.3mM时,AuNP-PAAm的粒径分别为288 +/- 12和230 +/- 15nm。通过透射电子显微镜观察AuNP-PAAms,并且确定其尺寸为19 +/- 2nm(1.3mM)和17 +/- 2nm(1.1mM)。通过紫外可见光谱,我们检测到了波长为552nm的AuNPs的形成,并且通过X射线衍射分析,我们证明了晶体排列是面心立方的。 (c)2016 Wiley Periodicals,Inc. J. Appl。 Polym。科学2016,133,43560。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号