公开(公告)号：US20160116403A1

公开(公告)日：2016-04-28

申请号：US14889839

申请日：2014-05-08

Applicant: Colorado State University Research Foundation

Inventor： Kevin LEAR ,  Timothy ERICKSON

IPC: G01N21/41 ,  G02B6/42 ,  G02B6/12

CPC classification number: G01N21/4133 ,  G01M11/33 ,  G01N33/1833 ,  G01N2021/4166 ,  G01N2201/0873 ,  G02B6/028 ,  G02B6/12004 ,  G02B6/1221 ,  G02B6/4291 ,  G02B27/56 ,  G02B2006/12123 ,  G02B2006/12138 ,  Y02A20/206

Abstract: A chip-scale, reusable sensor can detect aromatic hydrocarbons, such as benzene, toluene, ethylbenzene, and xylenes (BTEX), rapidly in water without sample preparation. The device is capable of real-time, continuous monitoring for BTEX solutes, which diffuse into a film, such as a polymer, on the sensors surface. In operation, BTEX analytes concentrate in the film, causing an increase in refractive index, which modulates evanescent coupling into the chips integrated photodetector array. Integration of the photodetector array simplifies system instrumentation and permits incorporation of an on-chip photocurrent reference region in the immediate vicinity of the sensing region, reducing drift due to temperature fluctuations. In some examples, the chip responds linearly for BTEX concentrations between 1 ppm and 30 ppm, with a limit of detection of 359 ppb, 249 ppb, and 103 ppb for benzene, toluene, and xylene in water, respectively.

Abstract translation: 芯片级的可重复使用的传感器可以在没有样品制备的情况下快速检测芳烃，如苯，甲苯，乙苯和二甲苯（BTEX）。 该装置能够实时，连续地监测传感器表面上扩散到薄膜（如聚合物）中的BTEX溶质。 在操作中，BTEX分析物集中在膜中，引起折射率的增加，其调节到芯片集成光电检测器阵列中的渐逝耦合。 光电检测器阵列的集成简化了系统仪器，并且允许在感测区域附近并入片上光电流参考区域，从而减少由于温度波动引起的漂移。 在一些实例中，芯片对于1ppm和30ppm之间的BTEX浓度线性反应，分别对苯，苯和二甲苯的检测限为359ppb，249ppb，103ppb。