Synthesis of TlBr and Tl 2 AgBr 3 Nanocrystals
Synthesis of TlBr and Tl 2 AgBr 3 Nanocrystals
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DOI：
10.1002/cnma.202000100
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发表时间：
2020-05
期刊：
影响因子：
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通讯作者：
Timothy D. Siegler;Tushti Shah;D. Houck;M. Suri;Yangning Zhang;B. Korgel
中科院分区：
文献类型：
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作者：
Timothy D. Siegler;Tushti Shah;D. Houck;M. Suri;Yangning Zhang;B. Korgel
只有少数几个用铊（Tl）进行的金属氢化物合成的例子。在这里，我们报告了均匀的，配体稳定的胶体纳米晶体的TlBr和Tl2AgBr3纳米晶体的平均直径范围在10和20 nm之间的合成。 TlBr纳米晶是通过将三甲基溴化硅烷（TMSBr）热注入油胺、油酸和十八烯与乙酸铊（III）或乙酸铊（I）的溶液中制备的。当银（I）乙酸盐被包括在反应中时，形成Tl2AgBr 3纳米晶体。TlBr纳米晶体具有CsCl晶体结构，直接带隙为3.1eV。 Tl_2AgBr_3纳米晶具有三方白云石晶体结构，间接带隙为3.1eV。 用铊（III）制成的TlBr纳米晶体足够均匀，可以组装成面心立方（fcc）超晶格。
There are only a few examples of nanocrystal synthesis with thallium (Tl). Here, we report the synthesis of uniform, ligand‐stabilized colloidal nanocrystals of TlBr and Tl2AgBr3nanocrystals with average diameter ranging between 10 and 20 nm. TlBr nanocrystals are made by hot injection of trimethylsilyl bromide (TMSBr) into solutions of oleylamine, oleic acid and octadecene with thallium (III) or thallium (I) acetate. Tl2AgBr3nanocrystals form when silver (I) acetate is included in the reaction. The TlBr nanocrystals have CsCl crystal structure with a direct band gap of 3.1 eV. The Tl2AgBr3nanocrystals have trigonal dolomite crystal structure with an indirect band gap of 3.1 eV. The TlBr nanocrystals made with thallium (III) were sufficiently uniform to assemble into face‐centered cubic (fcc) superlattices.