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Core@Satellite Janus Nanomotors with pH-Responsive Multi-phoretic Propulsion.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-06-07 , DOI: 10.1002/anie.202006421 Yi Xing 1 , Mengyun Zhou 1 , Tailin Xu 1 , Songsong Tang 1 , Yang Fu 2 , Xin Du 1 , Lei Su 1 , Yongqiang Wen 1 , Xueji Zhang 1 , Tianyi Ma 2
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-06-07 , DOI: 10.1002/anie.202006421 Yi Xing 1 , Mengyun Zhou 1 , Tailin Xu 1 , Songsong Tang 1 , Yang Fu 2 , Xin Du 1 , Lei Su 1 , Yongqiang Wen 1 , Xueji Zhang 1 , Tianyi Ma 2
Affiliation
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We report core@satellite Janus mesoporous silica‐Pt@Au (JMPA) nanomotors with pH‐responsive multi‐phoretic propulsion. The JMPA nanomotors first undergo self‐diffusiophoretic propulsion in 3.0 % H2O2 due to the isolation of the Au nanoparticles (AuNPs) from the PtNPs layer. Then the weak acidity of H2O2 can trigger the disassembly and reassembly of the AuNPs, resulting in the Janus distribution of large AuNPs aggregates. Such reconstruction of JMPA leads to the contact between PtNPs and AuNPs aggregates, thus changing the propulsion mechanism to self‐electrophoresis. The asymmetric and aggregated AuNPs also enable the generation of a thermal gradient under laser irradiation, which propels the JMPA nanomotors by self‐thermophoresis. Such multi‐phoretic propulsion offers considerable promise for developing advanced nanomachines with a stimuli‐responsive switch of propulsion modes in biomedical applications.
中文翻译：
具有pH响应多谱推进的Core @ Satellite Janus纳米电机。
我们报告了具有pH响应多谱推进的core @ satellite Janus介孔二氧化硅Pt @ Au（JMPA）纳米电机。由于将金纳米颗粒（AuNPs）与PtNPs层隔离开来，JMPA纳米电机首先在3.0％H 2 O 2中经历自扩散电泳。然后是H 2 O 2的弱酸性会触发AuNP的拆卸和重新组装，从而导致大型AuNP聚集体的Janus分布。JMPA的这种重构导致PtNP和AuNPs聚集体之间的接触，从而将推进机制改变为自电泳。不对称且聚集的AuNPs还可以在激光照射下生成热梯度，从而通过自热电泳推动JMPA纳米电机。这种多隐喻的推进力为开发先进的纳米机器提供了广阔的前景，该先进的纳米机器在生物医学应用中具有刺激响应模式的推进响应切换。
更新日期：2020-08-10
中文翻译：
具有pH响应多谱推进的Core @ Satellite Janus纳米电机。
我们报告了具有pH响应多谱推进的core @ satellite Janus介孔二氧化硅Pt @ Au（JMPA）纳米电机。由于将金纳米颗粒（AuNPs）与PtNPs层隔离开来，JMPA纳米电机首先在3.0％H 2 O 2中经历自扩散电泳。然后是H 2 O 2的弱酸性会触发AuNP的拆卸和重新组装，从而导致大型AuNP聚集体的Janus分布。JMPA的这种重构导致PtNP和AuNPs聚集体之间的接触，从而将推进机制改变为自电泳。不对称且聚集的AuNPs还可以在激光照射下生成热梯度，从而通过自热电泳推动JMPA纳米电机。这种多隐喻的推进力为开发先进的纳米机器提供了广阔的前景，该先进的纳米机器在生物医学应用中具有刺激响应模式的推进响应切换。
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