Fabrication of VOC sensor composed of natural products.

研究了不含染料的挥发性有机化合物比色传感材料的制备。结构颜色的变化将通过改变颗粒大小和同时改变颗粒排列的周期性来表现。为此，在单分散的球形二氧化硅颗粒上均匀沉积了可膨胀的层状硅酸盐。沉积是通过选择性侵蚀二氧化硅颗粒的表面来实现的，使硅酸阴离子成为层状硅酸盐的来源之一。在层状硅酸盐的层间空间插入一种阳离子表面活性剂，导致颗粒尺寸增大。具有周期性排列的疏水可膨胀球形颗粒对VOC的吸附会产生结构色响应。

Fabrication of colorimetric sensing materials for volatile organic compounds (VOCs) without dyes has been investigated. Change in a structural color will exhibit by varying particle size and simultaneous changing the periodicity of the particle arrangement. For this purpose, a swellable layered silicate on monodispersed spherical silica particles was deposited homogeneously. The deposition was achieved by selective erosion only on the surface of the silica particles to give silicate anion as one of the sources of the layered silicate. A cationic surfactant was intercalated into the interlayer space of the layered silicate, leading to the increase in the particle size. Response of a structural color will occur to VOC adsorption on the hydrophobic swellable spherical particles with periodic arrangement.