Trace detection of homologues and isomers based on hollow mesoporous silica sphere photonic crystals,Materials Horizons

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Trace detection of homologues and isomers based on hollow mesoporous silica sphere photonic crystals
Materials Horizons ( IF 12.2 ) Pub Date : 2017-08-07 00:00:00 , DOI: 10.1039/c7mh00447h
Chengjia Xiong _{1,

2,

3,

4} , Jiupeng Zhao _{2,

3,

4,

5} , Lebin Wang _{2,

3,

4,

6} , Hongbin Geng _{1,

2,

3,

4} , Hongbo Xu _{2,

3,

4,

5} , Yao Li _{2,

3,

4,

6}

Affiliation

A photonic crystal (PC) sensor that can detect homologues and isomers with very similar refractive indices through stopband shifts has been prepared from highly monodispersed hollow mesoporous silica spheres (HMSSs) for the first time. The HMSS PC shows two obvious reflection peaks, the positions of which are related to the inner and outer diameters of the HMSSs. When the HMSS PC sensors are infiltrated with 10 μL of homologues or isomers, the positions of the second reflection peaks remain nearly unchanged, while the first reflection peaks shift between 60 and 200 nm. The difference in the refractive indices of n-propanol and iso-propanol is only 0.008; however, the difference in the stopband shifts is approximately 25 nm, showing high sensitivity in distinguishing homologues and isomers of the HMSS PC. The proposed strategy provides a convenient, cheap trace detection method to distinguish homologues and isomers.

中文翻译：

基于中空介孔二氧化硅球光子晶体的同系物和异构体的痕量检测

首次从高度单分散的中空介孔二氧化硅球（HMSS）中制备了可以通过阻带位移检测具有非常相似的折射率的同系物和异构体的光子晶体（PC）传感器。HMSS PC显示两个明显的反射峰，其位置与HMSS的内径和外径有关。当HMSS PC传感器渗透有10μL的同系物或异构体时，第二个反射峰的位置几乎保持不变，而第一个反射峰在60到200 nm之间移动。n的折射率之差-丙醇和异丙醇仅为0.008; 但是，阻带频移的差异约为25 nm，显示出在区分HMSS PC的同系物和异构体方面的高灵敏度。所提出的策略提供了一种方便，廉价的痕量检测方法来区分同系物和异构体。

更新日期：2017-08-29

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