Highly Sensitive and Fast Anion-Selective InN Quantum Dot Electrochemical Sensors
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概要
- 論文の詳細を見る
Epitaxial InN quantum dots (QDs) are demonstrated as ion-selective electrode for potentiometric anion concentration measurements. The sensor reveals high sensitivity above 90 mV/decade for the detection of chlorine and hydroxyl ions in sodium chloride (NaCl), calcium chloride (CaCl<inf>2</inf>), and sodium hydroxide (NaOH) solutions. The response time is less than two seconds after which the signal is very stable and repeatable. The sensitivity for the InN QDs is about two times that for a reference InN thin film and the response time is about five times shorter. In pH buffer solutions the sensor reveals no clear response to cations. A model is presented for the high sensitivity, fast response, and ion selectivity based on the unique electronic properties of the InN surface together with the zero-dimensional nature of the QDs.
- The Japan Society of Applied Physicsの論文
- 2013-11-25
著者
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Willander Magnus
Department Of Microelectronics And Nanoscience Chalmers University Of Technology And Gothenburg Univ
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Rodriguez Paul
Institute for Systems based on Optoelectronics and Microtechnology (ISOM), ETSI Telecomunicación, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain
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Willander Magnus
Department of Science and Technology (ITN), Campus Norrköping, Linköping University, 60174 Norrköping, Sweden
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Alvi Naveed
Institute for Systems based on Optoelectronics and Microtechnology (ISOM), ETSI Telecomunicación, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain
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Gómez Victor
Institute for Systems based on Optoelectronics and Microtechnology (ISOM), ETSI Telecomunicación, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain
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Kumar Praveen
Institute for Systems based on Optoelectronics and Microtechnology (ISOM), ETSI Telecomunicación, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain
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Nötzel Richard
Institute for Systems based on Optoelectronics and Microtechnology (ISOM), ETSI Telecomunicación, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain
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Kumar Praveen
Institute for Systems based on Optoelectronics and Microtechnology (ISOM), ETSI Telecomunicación, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain
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Alvi Naveed
Institute for Systems based on Optoelectronics and Microtechnology (ISOM), ETSI Telecomunicación, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain
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Nötzel Richard
Institute for Systems based on Optoelectronics and Microtechnology (ISOM), ETSI Telecomunicación, Universidad Politécnica de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain
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