核壳与空心金纳米材料的制备及光学性质
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- 英文论文题名：Facile synthesis of core-shell and hollow gold nanomaterials with tunable shell thicknesses and optical properties
- 论文作者：鲁闻生 ; 王海飞 ; 刘星岑 ; 江龙
- 英文论文作者：Wensheng Lu ; H.Wang ; X.Liu ; L.Jiang ; Institute of Chemistry ; Chinese Academy of Sciences ; Research Institute of Experiment and Detection ; Xinjiang Oilfield Company
- 年：2016
- 作者机构：中国科学院化学研究所;新疆油田公司实验检测研究院;
- 论文关键词：金 ; 核壳材料 ; 空心材料 ; 纳米棒
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第三十一分会：胶体与界面化学
- 语种：中文
- 分类号：O614.123;TB383.1
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第三十一分会 ; 胶体与界面化学
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：209k
- 原文格式：D
- 会议级别：全国
摘要
金纳米材料具有基于等离子体共振的优异光学性能。通常PS@Au核壳材料的制备需要先制备种子,再进行生长。通过强、弱还原剂的搭配,我们采用无种子生长法简便、可控地制备了金纳米壳层。该纳米材料具有与结构相关的表面等离子体共振,其吸收峰随着金纳米壳的生长而逐渐红移,并且能够将808 nm的激光转化为热量~([1])。在空心金纳米材料的制备方面,利用改进的低温溶剂热处理方法,使用PS@Au核壳材料作为原料,在DMF溶剂中可控制备了金纳米笼和空心金纳米球,该方法可有效避免金纳米壳层的坍塌~([2])。其次,通过使用无生物毒性的C18N3表面活性剂,在金纳米棒表面可控沉积银,制备了核壳结构的Au@Ag纳米棒,该纳米棒的SPR光谱在近红外与可见光区可调。
Gold nanomaterials exhibit unique optical property due to their tunable surface plasmon resonance(SPR)absorptions.Compared with seed-mediated growth process,we present a facile one-pot seedless approach to controllably prepare PS@Au nanomaterials by combining strong and weak reductants.The obtained materials showed structure-dependent SPR and their absorption wavelengths red-shifted as the gold shells grew from incomplete to continuous layers.In terms of the photothermal conversion property,gold nanoshells could effectively convert 808 nm laser to heat.Secondly,an improved template etching method was demonstrated by etching PS@Au core-shell nanospheres.When PS cores were removed by a thermal treatment in N,N-Dimethylformamide(DMF),gold nanocages and hollow gold nanospheres were obtained and the collapse of the nanoshells was avoided.Thirdly,Au nanorods were employed as seeds to tailor the deposition of Ag shells and the synthesis of core-shell Au@Ag nanorods in C18N3 aqueous solutions.The SPR spectra of core-shell Au@Ag nanorods can be adjusted from NIR to visible region.
Gold nanomaterials exhibit unique optical property due to their tunable surface plasmon resonance(SPR)absorptions.Compared with seed-mediated growth process,we present a facile one-pot seedless approach to controllably prepare PS@Au nanomaterials by combining strong and weak reductants.The obtained materials showed structure-dependent SPR and their absorption wavelengths red-shifted as the gold shells grew from incomplete to continuous layers.In terms of the photothermal conversion property,gold nanoshells could effectively convert 808 nm laser to heat.Secondly,an improved template etching method was demonstrated by etching PS@Au core-shell nanospheres.When PS cores were removed by a thermal treatment in N,N-Dimethylformamide(DMF),gold nanocages and hollow gold nanospheres were obtained and the collapse of the nanoshells was avoided.Thirdly,Au nanorods were employed as seeds to tailor the deposition of Ag shells and the synthesis of core-shell Au@Ag nanorods in C18N3 aqueous solutions.The SPR spectra of core-shell Au@Ag nanorods can be adjusted from NIR to visible region.
引文
[1]Wang,H.;Liu,X.;Li,X.;Lu,W.;Jiang,L.Chem Select.2016,1(4):659.
[2]Wang,H.;Han,J.;Lu,W.;Zhang,J.;Li,J.;Jiang,L.J.Colloid Interface Sci.2015,440:236.
[2]Wang,H.;Han,J.;Lu,W.;Zhang,J.;Li,J.;Jiang,L.J.Colloid Interface Sci.2015,440:236.