Next Issue

E-Mail Alert

Add your e-mail address to receive forthcoming issues of this journal:

Journal Browser

Journal Browser

Table of Contents

Sensors, Volume 1, Issue 1 (June 2001), Pages 1-52

  • Issues are regarded as officially published after their release is announced to the table of contents alert mailing list.
  • You may sign up for e-mail alerts to receive table of contents of newly released issues.
  • PDF is the official format for papers published in both, html and pdf forms. To view the papers in pdf format, click on the "PDF Full-text" link, and use the free Adobe Readerexternal link to open them.
View options order results:
result details:
Displaying articles 1-5
Export citation of selected articles as:

Research

Open AccessArticle The New Theory of Ion-Selective Electrodes
Sensors 2001, 1(1), 1-12; doi:10.3390/s10100001
Received: 24 April 2001 / Accepted: 8 May 2001 / Published: 16 May 2001
Cited by 4 | PDF Full-text (390 KB)
Abstract
The paper discusses the anomalies of the former interpretation of the working mechanism of the ion-selective electrodes. It was thorougly discussed why the Donnan experiment could not be applied as the theoretical background of glass electrodes. It was assumed according to the Donnan
[...] Read more.
The paper discusses the anomalies of the former interpretation of the working mechanism of the ion-selective electrodes. It was thorougly discussed why the Donnan experiment could not be applied as the theoretical background of glass electrodes. It was assumed according to the Donnan interpretation that the measurable potential is produced by the transfer of the primary ion through the membrane. Since the 1960s, the author and coworkers have been investigating the problem of what can be the reason for the potential response of the electrodes. Practical measurements in connection with the response time, surface hindered reactions etc. were interpreted. Furthermore, the energy problems according to the Gibbs theory using two electrode components were investigated. It was established that the electrodes on which chemical reactions may occur with the primary ion have a surface reaction as the chemical basis of the response. For electrodes that work on the principle of the lyotropic series, surface reactions are also involved, but their response is not always Nernstian. The energy demand is covered by the charge separation at the electrodesolution interface. Full article
Open AccessArticle Affinity sensors in non-equilibrium conditions: highly selective chemosensing by means of low selective chemosensors
Sensors 2001, 1(1), 13-17; doi:10.3390/s10100013
Received: 6 June 2001 / Accepted: 18 June 2001 / Published: 20 June 2001
Cited by 5 | PDF Full-text (313 KB)
Abstract The selectivity of measurements by means of affinity sensors in (quasi)equilibrium conditions and in non-equilibrium conditions was compared. The results show that the measurements in non-equilibrium conditions can reduce or even eliminate a relative contribution of interferents to a sensor signal. Full article
Open AccessArticle Electrochemical Characterisation and Application of Multi Microelectrode Array Devices to Biological Electrochemistry
Sensors 2001, 1(1), 18-28; doi:10.3390/s10100018
Received: 29 May 2001 / Accepted: 14 June 2001 / Published: 20 June 2001
Cited by 9 | PDF Full-text (282 KB)
Abstract
A new design for microelectrode array (MEA) devices fabricated by semiconductor-processing techniques is presented. The microelectrode surfaces consist of gold and are surrounded by an insulating silicon nitride layer. Each chip of these so-called Multi MEAs contains regular arrays with circular-shaped electrodes of
[...] Read more.
A new design for microelectrode array (MEA) devices fabricated by semiconductor-processing techniques is presented. The microelectrode surfaces consist of gold and are surrounded by an insulating silicon nitride layer. Each chip of these so-called Multi MEAs contains regular arrays with circular-shaped electrodes of eight different sizes: 1, 3, 5, 10, 50, 100, 500 and 1000μm. The Multi MEAs were electrochemically characterised by use of ferrocenecarboxylic acid. Well-defined cyclic voltammograms of the two small redox proteins, horse heart cytochrome c and amicyanin from Thiobacillus versutus, were obtained at variously surface-modified Multi MEAs. Furthermore, a very simple method to manufacture Multi MEAs with carbon surfaces is introduced. Full article
Open AccessArticle Errors in Chemical Sensor Measurements
Sensors 2001, 1(1), 29-37; doi:10.3390/s10100029
Received: 14 May 2001 / Accepted: 8 June 2001 / Published: 20 June 2001
Cited by 11 | PDF Full-text (43 KB)
Abstract
Various types of errors during the measurements of ion-selective electrodes, ionsensitive field effect transistors, and fibre optic chemical sensors are described. The errors were divided according to their nature and place of origin into chemical, instrumental and non-chemical. The influence of interfering ions,
[...] Read more.
Various types of errors during the measurements of ion-selective electrodes, ionsensitive field effect transistors, and fibre optic chemical sensors are described. The errors were divided according to their nature and place of origin into chemical, instrumental and non-chemical. The influence of interfering ions, leakage of the membrane components, liquid junction potential as well as sensor wiring, ambient light and temperature is presented. Full article
Open AccessArticle Improving the Responses of Several Accelerometers Used in a Car Under Performance Tests by Using Kalman Filtering
Sensors 2001, 1(1), 38-52; doi:10.3390/s10100038
Received: 18 May 2001 / Accepted: 12 June 2001 / Published: 28 June 2001
Cited by 25 | PDF Full-text (315 KB) | HTML Full-text | XML Full-text
Abstract
In this paper a Kalman filter is used to cancel noise and interference contained in two accelerometers embedded in a car under performance tests. Here, the frequency bands of the signals of interest and their noise (deterministic as well as stochastic) are not
[...] Read more.
In this paper a Kalman filter is used to cancel noise and interference contained in two accelerometers embedded in a car under performance tests. Here, the frequency bands of the signals of interest and their noise (deterministic as well as stochastic) are not strongly mixed with each other but it is very difficult to diminish the noise by using the classical approach to filtering. This reason, among others, justifies the necessity of the application of optimal filtering; and the Kalman filtering application allowed us to obtain optimal results (in the minimum mean-square sense) and signal-to-noise ratio improvements higher than 30 dB were achieved. The experimental results demonstrate the importance of using both analog signal conditioning and digital signal processing when dealing with signals corrupted by noise. Full article

Journal Contact

MDPI AG
Sensors Editorial Office
St. Alban-Anlage 66, 4052 Basel, Switzerland
sensors@mdpi.com
Tel. +41 61 683 77 34
Fax: +41 61 302 89 18
Editorial Board
Contact Details Submit to Sensors
Back to Top