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Ag photoionization-induced single-pass assembly of Ag2S nanodots in flowing thiol droplets
Green Chemistry ( IF 9.3 ) Pub Date : 2018-02-06 00:00:00 , DOI: 10.1039/c7gc03822d Bijay Kumar Poudel 1, 2, 3, 4 , Kyung-Oh Doh 2, 4, 5, 6 , Jeong Hoon Byeon 1, 2, 3, 4
Green Chemistry ( IF 9.3 ) Pub Date : 2018-02-06 00:00:00 , DOI: 10.1039/c7gc03822d Bijay Kumar Poudel 1, 2, 3, 4 , Kyung-Oh Doh 2, 4, 5, 6 , Jeong Hoon Byeon 1, 2, 3, 4
Affiliation
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Photoinduced assembly of Ag2S nanodots with surface thiolates was achieved in a single-pass gas stream configuration. Ag nanoagglomerates were converted into aligned Ag2S nanodots without hydrothermal reaction, separation, or purification procedures. The proposed route to fabricate hybrid nanodroplets containing Ag nanoagglomerates and 1-hexanethiol resulted in electrostatic interactions between Ag surfaces and thiol groups to assemble Ag2S nanodots. Photoirradiation (185 nm wavelength UV light) onto the nanodroplets induced electron detachments from Ag via photons (photon energy: 6.2 eV) reaching the Ag (work function: 4.3 eV) surfaces. The positively charged Ag surfaces interacted with the negatively charged surrounding thiol groups, resulting in the formation of Ag2S nanodots. Continuous photoirradiation for 6.4 s resulted in complete phase transfer; thus, inducing the isolation of the nanodots (i.e., resulting in an aligned structure of the nanodots without random aggregation) by conjugated surface thiolates. The nanodots were stably dispersible for near-infrared-radiation-induced fluorescence bioimaging without significant cytotoxic effects; furthermore, merging the nanodots with TiO2 nanoparticles significantly enhanced photocurrent generation under simulated solar irradiation. The photoinduced assembly demonstrates a new feasible safe-by-design platform to continuously produce photoresponsive nanodots without optimization concerning chemically efficient and environmentally benign concepts.
中文翻译：
Ag光电离诱导的流动硫醇液滴中Ag 2 S纳米点的单程组装
在单程气流配置中实现了Ag 2 S纳米点与表面硫醇盐的光诱导组装。Ag纳米团聚物无需水热反应，分离或纯化程序即可转化为排列的Ag 2 S纳米点。拟议的制造包含Ag纳米团聚物和1-己烷硫醇的杂化纳米液滴的途径导致Ag表面和硫醇基团之间的静电相互作用，从而组装Ag 2 S纳米点。光照射（185nm的波长的UV光）到致电子脱离由Ag的纳米液滴通过光子（光子能量：6.2 eV）到达银（功函：4.3 eV）表面。带正电的Ag表面与周围带负电的巯基相互作用，导致形成Ag 2 S纳米点。连续光辐照6.4 s导致完全相转移；因此，通过共轭表面硫醇盐诱导纳米点的分离（即，导致纳米点的排列结构无随机聚集）。纳米点可稳定分散，用于近红外辐射诱导的荧光生物成像，而无明显的细胞毒性作用。此外，将纳米点与TiO 2合并纳米粒子在模拟太阳辐射下显着增强了光电流的产生。光诱导组件展示了一个新的可行的安全设计平台，该平台可以连续生产光响应纳米点，而无需进行化学效率和环境友好概念的优化。
更新日期：2018-03-06
中文翻译：
Ag光电离诱导的流动硫醇液滴中Ag 2 S纳米点的单程组装
在单程气流配置中实现了Ag 2 S纳米点与表面硫醇盐的光诱导组装。Ag纳米团聚物无需水热反应，分离或纯化程序即可转化为排列的Ag 2 S纳米点。拟议的制造包含Ag纳米团聚物和1-己烷硫醇的杂化纳米液滴的途径导致Ag表面和硫醇基团之间的静电相互作用，从而组装Ag 2 S纳米点。光照射（185nm的波长的UV光）到致电子脱离由Ag的纳米液滴通过光子（光子能量：6.2 eV）到达银（功函：4.3 eV）表面。带正电的Ag表面与周围带负电的巯基相互作用，导致形成Ag 2 S纳米点。连续光辐照6.4 s导致完全相转移；因此，通过共轭表面硫醇盐诱导纳米点的分离（即，导致纳米点的排列结构无随机聚集）。纳米点可稳定分散，用于近红外辐射诱导的荧光生物成像，而无明显的细胞毒性作用。此外，将纳米点与TiO 2合并纳米粒子在模拟太阳辐射下显着增强了光电流的产生。光诱导组件展示了一个新的可行的安全设计平台，该平台可以连续生产光响应纳米点，而无需进行化学效率和环境友好概念的优化。
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