solid state ph sensor based on light emitting diodes (led) as detector platform固态ph传感器基于发光二极管(led)作为探测器平台.pdfVIP

下载本文档

5
0
约3.57万字
约 12页
2017-09-12 发布于上海
举报
版权申诉

solid state ph sensor based on light emitting diodes (led) as detector platform固态ph传感器基于发光二极管(led)作为探测器平台.pdf

1、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。。
2、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
3、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。
4、该文档为VIP文档，如果想要下载，成为VIP会员后，下载免费。
5、成为VIP后，下载本文档将扣除1次下载权益。下载后，不支持退款、换文档。如有疑问请联系我们。
6、成为VIP后，您将拥有八大权益，权益包括：VIP文档下载权益、阅读免打扰、文档格式转换、高级专利检索、专属身份标志、高级客服、多端互通、版权登记。
7、VIP文档为合作方或网友上传，每下载1次，网站将根据用户上传文档的质量评分、类型等，对文档贡献者给予高额补贴、流量扶持。如果你也想贡献VIP文档。上传文档

solid state ph sensor based on light emitting diodes (led) as detector platform固态ph传感器基于发光二极管(led)作为探测器平台

Sensors 2006, 6, 848-859 sensors ISSN 1424-8220 © 2006 by MDPI /sensors Full Research Paper Solid State pH Sensor Based on Light Emitting Diodes (LED) As Detector Platform King Tong Lau*, R. Shepherd, Danny Diamond and Dermot Diamond* National Centre for Sensor Research, School of Chemical Sciences, Dublin City University, Dublin, Ireland E-mails: kim.lau@dcu.ie, roderick.shepherd@dcu.ie, danny.diamond@dcu.ie, dermot.diamond@dcu.ie. * Author to whom correspondence should be addressed, kim.lau@dcu.ie (King Tong Lau), Dermot.diamond@dcu.ie (Dermot Diamond) Received: 7 March 2006 / Accepted:1 May 2006 /07/03/2006 / Published: 23 August 2006 Abstract: A low-power, high sensitivity, very low-cost light emitting diode (LED)-based device developed for low-cost sensor networks was modified with bromocresol green membrane to work as a solid-state pH sensor. In this approach, a reverse-biased LED functioning as a photodiode is coupled with a second LED configured in conventional emission mode. A simple timer circuit measures how long (in microsecond) it takes for the photocurrent generated on the detector LED to discharge its capacitance from logic 1 (+5 V) to logic 0 (+1.7 V). The entire instrument provides an inherently digital output of light intensity measurements for a few cents. A light dependent resistor (LDR) modified with similar sensor membrane was also used as a comparison method. Bot