Fabrication of densely packed titania nanosheet films on solid surface by use of Langmuir-Blodgett deposition method without amphiphilic additives
Fabrication of densely packed titania nanosheet films on solid surface by use of Langmuir-Blodgett deposition method without amphiphilic additives
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DOI：
10.1021/la050293f
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发表时间：
2005-07-05
期刊：
影响因子：
3.9
通讯作者：
Haga, M
中科院分区：
文献类型：
--
作者：
Muramatsu, M;Akatsuka, K;Haga, M
通过LB转移法在固体基底上制备了密集堆积的剥离纳米片，如Ti0.91O2、Ti0.8M0.2O2（M = Co、Ni）、Ti0.6Fe0.4O2和Ca2Nb3O10，在空气-水界面处没有任何两亲添加剂。纳米片微晶覆盖固体表面近 95%，纳米片重叠最少。 Ti0.91O2纳米片单层薄膜的LB转移方法不仅适用于石英、硅、氧化铟锡（ITO）和玻璃等亲水性基材，而且适用于疏水性Au表面。基于这些点，LB转移法与交替层层法相比具有优势，后者利用带相反电荷的聚电解质，例如聚(乙烯亚胺)(PEI)。疏水性 Ti0.91O2 纳米片在空气-水界面的吸附是这种 LB 转移沉积方法的原因。向面下相中添加四丁基溴化铵有助于吸附，导致空气-水界面处Ti0.91O2纳米片的吸附量增加。
Densely packed exfoliated nanosheet films such as Ti0.91O2, Ti0.8M0.2O2 (M = Co, Ni), Ti0.6Fe0.4O2, and Ca2Nb3O10 on solid substrates were prepared by the LB transfer method without any amphiphilic additives at the air-water interface. Nanosheet crystallites covered nearly 95% on the solid surface with minimum overlapping of nanosheets. The LB transfer method of the Ti0.91O2 nanosheet monolayer film is applicable for not only hydrophilic substrates such as quartz, silicon, indium-tin oxide (ITO), and glass but also the hydrophobic Au surface. On the basis of these points, the LB transfer method has advantages compared to the alternating layer-by-layer method, which makes use of oppositely charged polyelectrolytes such as poly(ethylenimine) (PEI). Adsorption of hydrophobic Ti0.91O2 nanosheets at the air-water interface is responsible for this LB transfer deposition method. The addition of tetrabutylammonium bromide into the subphase assisted the adsorption, causing an increase in the adsorbed amount of Ti0.91O2 nanosheets at the air-water interface.