Field-programmable gate array based controller for multi spot light-addressable potentiometric sensors with integrated signal correction mode
Field-programmable gate array based controller for multi spot light-addressable potentiometric sensors with integrated signal correction mode
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DOI：
10.1016/j.electacta.2011.03.012
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发表时间：
2011-11-01
影响因子：
6.6
通讯作者：
Schoening, Michael J.
中科院分区：
文献类型：
--
作者：
Werner, Carl Frederik;Schusser, Sebastian;Schoening, Michael J.
光寻址电位传感器(LAPS)可以以空间分辨的方式同时测量传感器表面的一种或几种分析物的浓度。调制光指示器在感兴趣的区域刺激半导体结构，并且可以读出响应的光电流。通过用不同调制频率的光指示器同时刺激几个区域，可以同时执行读出。利用基于现场可编程门阵列(FPGA)的新型电子控制器，可以独立和同时控制多个光指示器的调制频率、相移和光亮度。因此，有可能研究传感器的频率响应，并通过电流/电压曲线和相/电压曲线测定表面电位来检查分析物浓度。此外，使用单独改变每个光指示器的光强度的能力来执行信号校正。(C)2011爱思唯尔有限公司。保留所有权利。
A light-addressable potentiometric sensor (LAPS) can measure the concentration of one or several analytes at the sensor surface simultaneously in a spatially resolved manner. A modulated light pointer stimulates the semiconductor structure at the area of interest and a responding photocurrent can be read out. By simultaneous stimulation of several areas with light pointers of different modulation frequencies, the read out can be performed at the same time. With the new proposed controller electronic based on a field-programmable gate array (FPGA), it is possible to control the modulation frequencies, phase shifts, and light brightness of multiple light pointers independently and simultaneously. Thus, it is possible to investigate the frequency response of the sensor, and to examine the analyte concentration by the determination of the surface potential with the help of current/voltage curves and phase/voltage curves. Additionally, the ability to individually change the light intensities of each light pointer is used to perform signal correction. (C) 2011 Elsevier Ltd. All rights reserved.