Using Interaction of Nano Dipoles to Control the Growth of Nanorods
Using Interaction of Nano Dipoles to Control the Growth of Nanorods
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利用纳米偶极子的相互作用来控制纳米棒的生长
DOI：
10.1021/acs.jpclett.0c03276
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Sun, Liangfeng
中科院分区：
文献类型：
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作者：
Tang, Yiteng;Premathilaka, Shashini M.;Weeraddana, Tharaka MDS;Kandel, Shreedhar R.;Jiang, Zhoufeng;Neupane, Chandra P.;Xi, Haowen;Wan, Wenhui;Sun, Liangfeng
带电的面的一个纳米可以形成一个内在的电偶极子。当调整这些纳米偶极子之间的间距时，偶极相互作用能从热能的分数调谐到倍数。因此，一维定向附着可以打开或关闭，纳米棒的生长也是如此。这种动力学控制的生长在相对低的反应温度下实现，而动力学控制的生长在较高的温度下占主导地位。所合成的PbSe纳米棒是无分支的，表现出单指数的光致发光衰减曲线，其e折叠寿命为1.3 μs，光致发光量子产率为35%。
Charged facets of a nanocrystal can form an intrinsic nanometer-size electric dipole. When the spacing between these nano dipoles is adjusted, the dipolar interaction energy is tuned from a fraction to a multiple of the thermal energy. Consequently, the one-dimensional oriented attachment can be switched on or off, as is the growth of nanorods. This kinetically controlled growth is achieved at relatively low reaction temperatures while the thermodynamically controlled growth dominates at higher temperatures. The synthesized PbSe nanorods are branchless, exhibiting a single-exponential photoluminescence decay trace with an e-folding lifetime of 1.3 μs and a photoluminescence quantum yield of 35%.