Orthogonal Light-Induced Self-Assembly of Nanoparticles using Differently Substituted Azobenzenes
Orthogonal Light-Induced Self-Assembly of Nanoparticles using Differently Substituted Azobenzenes
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DOI：
10.1002/anie.201502419
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发表时间：
2015-10-12
影响因子：
16.6
通讯作者：
Klajn, Rafal
中科院分区：
文献类型：
--
作者：
Manna, Debasish;Udayabhaskararao, Thumu;Klajn, Rafal
精确控制复杂混合物中选定组分的自组装是一个具有挑战性的目标，其实现对于制造新型纳米材料至关重要。在这里，我们表明，通过装饰金属纳米粒子的表面与不同取代的偶氮苯，它是可能的调制光的波长，在这些纳米粒子的自组装诱导。将两种类型的纳米颗粒的混合物暴露于UV或蓝光下，每种纳米颗粒都用不同的偶氮苯官能化，诱导仅一种类型的纳米颗粒的选择性自组装。用另一种波长的辐射触发聚集体的分解，以及另一种类型的纳米颗粒的同时自组装。通过将两种类型的偶氮苯放置在相同的纳米颗粒上，我们创造了独特的材料（“受抑”纳米颗粒），其自组装被诱导而与入射光的波长无关。
Precise control of the self-assembly of selected components within complex mixtures is a challenging goal whose realization is important for fabricating novel nanomaterials. Herein we show that by decorating the surfaces of metallic nanoparticles with differently substituted azobenzenes, it is possible to modulate the wavelength of light at which the self-assembly of these nanoparticles is induced. Exposing a mixture of two types of nanoparticles, each functionalized with a different azobenzene, to UV or blue light induces the selective self-assembly of only one type of nanoparticles. Irradiation with the other wavelength triggers the disassembly of the aggregates, and the simultaneous self-assembly of nanoparticles of the other type. By placing both types of azobenzenes on the same nanoparticles, we created unique materials ("frustrated" nanoparticles) whose self-assembly is induced irrespective of the wavelength of the incident light.