A new issue of this journal has just been published. To see abstracts of the papers it contains (with links through to the full papers) click here:
Salicylaldehyde based colorimetric and “turn on” fluorescent sensors for fluoride anion sensing employing hydrogen bonding
13 June 2011, 23:17:36
Publication year: 2011
Source: Sensors and Actuators B: Chemical, In Press, Accepted Manuscript, Available online 13 June 2011
Qian, Li , Yong, Guo , Jian, Xu , Shijun, Shao
Two Salicylaldehyde based colorimetric and fluorescent chemosensors 1 and 2 were developed. Both receptors 1 and 2 showed unique selectivity for the fluoride anions over other anions in DMSO solution. [TBA] OH and 1HNMR titration experiments revealed that the F−-induced colorimetric and “turn on” fluorescence response were driven by hydrogen bonding interaction between the OH protons and F−.
Source: Sensors and Actuators B: Chemical, In Press, Accepted Manuscript, Available online 13 June 2011
Qian, Li , Yong, Guo , Jian, Xu , Shijun, Shao
Two Salicylaldehyde based colorimetric and fluorescent chemosensors 1 and 2 were developed. Both receptors 1 and 2 showed unique selectivity for the fluoride anions over other anions in DMSO solution. [TBA] OH and 1HNMR titration experiments revealed that the F−-induced colorimetric and “turn on” fluorescence response were driven by hydrogen bonding interaction between the OH protons and F−.
Low Cost chemical Sensor Device for Supersensitive Pentaerythritol Tetranitrate (PETN) Explosive Detection Based on Titanium Dioxide Nanotubes
13 June 2011, 23:17:36
Publication year: 2011
Source: Sensors and Actuators B: Chemical, In Press, Accepted Manuscript, Available online 13 June 2011
Mario, Boehme , Friedemann, Voelklein , Wolfgang, Ensinger
Within the last decade there has been a great increase in the need of trace and ultra-trace explosive detection. In this report, we demonstrate a new and versatile type of chemical explosive sensors based on metal oxide nanotubes easily made, even with the need of a low budget. We describe the step by step procedure to fabricate a sensing chip device, beginning with the synthesis of the starting materials to the point of supersensitive measurements of PETN explosive. As a result, the whole process actually is one of the most cost-effective methods to produce explosive sensing devices reported until now....
Source: Sensors and Actuators B: Chemical, In Press, Accepted Manuscript, Available online 13 June 2011
Mario, Boehme , Friedemann, Voelklein , Wolfgang, Ensinger
Within the last decade there has been a great increase in the need of trace and ultra-trace explosive detection. In this report, we demonstrate a new and versatile type of chemical explosive sensors based on metal oxide nanotubes easily made, even with the need of a low budget. We describe the step by step procedure to fabricate a sensing chip device, beginning with the synthesis of the starting materials to the point of supersensitive measurements of PETN explosive. As a result, the whole process actually is one of the most cost-effective methods to produce explosive sensing devices reported until now....
Ethanol sensing using CuO/MWNT thin film
13 June 2011, 23:17:36
Publication year: 2011
Source: Sensors and Actuators B: Chemical, In Press, Accepted Manuscript, Available online 13 June 2011
Mitesh, Parmar , Ravi, Bhatia , V., Prasad , K., Rajanna
Copper (II) oxide (CuO)/ multiwall carbon nanotube (MWNT) thin film based ethanol-sensors were fabricated by dispersing CVD-prepared MWNTs in varying concentration over DC magnetron sputtered-CuO films. The responses of these sensors as a function of MWNT concentrations and temperatures were measured, and compared. The sensing response was the maximum at an operating temperature near 400°C for all the samples irrespective of the MWNTs dispersed over them. At optimum operating temperature (Topt) of 407±1°C, the response is linear for 100–700ppm range and tends to saturate at higher concentration. In comparison with bare CuO sample, the response of CuO/MWNT sensing films increased...
Source: Sensors and Actuators B: Chemical, In Press, Accepted Manuscript, Available online 13 June 2011
Mitesh, Parmar , Ravi, Bhatia , V., Prasad , K., Rajanna
Copper (II) oxide (CuO)/ multiwall carbon nanotube (MWNT) thin film based ethanol-sensors were fabricated by dispersing CVD-prepared MWNTs in varying concentration over DC magnetron sputtered-CuO films. The responses of these sensors as a function of MWNT concentrations and temperatures were measured, and compared. The sensing response was the maximum at an operating temperature near 400°C for all the samples irrespective of the MWNTs dispersed over them. At optimum operating temperature (Topt) of 407±1°C, the response is linear for 100–700ppm range and tends to saturate at higher concentration. In comparison with bare CuO sample, the response of CuO/MWNT sensing films increased...
Hydrocarbons gas sensing of nano-cystalline perovskite oxides LnFeO3 (Ln=La, Nd and Sm)
13 June 2011, 23:17:36
Publication year: 2011
Source: Sensors and Actuators B: Chemical, In Press, Accepted Manuscript, Available online 13 June 2011
Ho Truong, Giang , Ha Thai, Duy , Pham Quang, Ngan , Giang Hong, Thai , Do Thi Anh, Thu , ...
In this paper, we report the properties of the nano-crystalline oxides LnFeO3 (Ln=La, Nd and Sm) synthesized by sol-gel citrate technique. The crystalline structure of the oxides was analyzed by X-ray Diffraction (XRD). The surface morphologies of the LnFeO3 thick-films on Al2O3 substrates were measured by Scanning Electron Microscope (SEM). The gas-sensing characteristics of the oxides LnFeO3 were investigated in methane (CH4), propane (C3H8) and n-hexane (C6H14) gases. All LnFeO3-based sensors exhibited good HCs sensing characteristics. The very high n-hexane sensitivities of NdFeO3 and SmFeO3-based sensors were discussed in term of an important role of rare earth elements.
Source: Sensors and Actuators B: Chemical, In Press, Accepted Manuscript, Available online 13 June 2011
Ho Truong, Giang , Ha Thai, Duy , Pham Quang, Ngan , Giang Hong, Thai , Do Thi Anh, Thu , ...
In this paper, we report the properties of the nano-crystalline oxides LnFeO3 (Ln=La, Nd and Sm) synthesized by sol-gel citrate technique. The crystalline structure of the oxides was analyzed by X-ray Diffraction (XRD). The surface morphologies of the LnFeO3 thick-films on Al2O3 substrates were measured by Scanning Electron Microscope (SEM). The gas-sensing characteristics of the oxides LnFeO3 were investigated in methane (CH4), propane (C3H8) and n-hexane (C6H14) gases. All LnFeO3-based sensors exhibited good HCs sensing characteristics. The very high n-hexane sensitivities of NdFeO3 and SmFeO3-based sensors were discussed in term of an important role of rare earth elements.
A Differential Surface Plasmon Resonance Sensor
13 June 2011, 23:17:36
Publication year: 2011
Source: Sensors and Actuators B: Chemical, In Press, Accepted Manuscript, Available online 13 June 2011
David J.L., Graham , Lionel R., Watkins
A novel technique that detects only the difference in refractive index between two areas of a surface plasmon resonance (SPR) sensor is presented. Since the measurement is independent of the common index, errors due to changes in the bulk index or temperature of the sensed medium are largely eliminated. A single, monochromatic beam is twice reflected from the SPR surface, with the p- and s-polarisations interchanged between reflections. A linear response to refractive index difference is obtained by measuring the change in angle of incidence at the second reflection required to maintain minimum transmission. Measurements with salt solutions of known...
Source: Sensors and Actuators B: Chemical, In Press, Accepted Manuscript, Available online 13 June 2011
David J.L., Graham , Lionel R., Watkins
A novel technique that detects only the difference in refractive index between two areas of a surface plasmon resonance (SPR) sensor is presented. Since the measurement is independent of the common index, errors due to changes in the bulk index or temperature of the sensed medium are largely eliminated. A single, monochromatic beam is twice reflected from the SPR surface, with the p- and s-polarisations interchanged between reflections. A linear response to refractive index difference is obtained by measuring the change in angle of incidence at the second reflection required to maintain minimum transmission. Measurements with salt solutions of known...
On the use of a self organising map as feature compressor in the building of calibration models: application to FTIR-spectrophotometry
13 June 2011, 23:17:36
Publication year: 2011
Source: Sensors and Actuators B: Chemical, In Press, Accepted Manuscript, Available online 13 June 2011
Eduard, Llobet , Mohamed, Anaimi , Alba, Pruñonosa , Eloi, Gras
Considerable attention has been given to strategies for variable selection in spectroscopic analysis. Here we introduce a different approach, the self organising map as a feature compressor, which also helps reducing the dimensionality of the problem. The method is straightforward and does not need previous knowledge about the regions of the spectra that contain relevant variables or information, so it applies generally. We coupled the method to multiple linear regression, partial component analysis and partial least squares and used it to quantitatively analyse 2-component liquid samples using FTIR spectroscopy. The predicted concentrations of the species within the mixture were extremely...
Source: Sensors and Actuators B: Chemical, In Press, Accepted Manuscript, Available online 13 June 2011
Eduard, Llobet , Mohamed, Anaimi , Alba, Pruñonosa , Eloi, Gras
Considerable attention has been given to strategies for variable selection in spectroscopic analysis. Here we introduce a different approach, the self organising map as a feature compressor, which also helps reducing the dimensionality of the problem. The method is straightforward and does not need previous knowledge about the regions of the spectra that contain relevant variables or information, so it applies generally. We coupled the method to multiple linear regression, partial component analysis and partial least squares and used it to quantitatively analyse 2-component liquid samples using FTIR spectroscopy. The predicted concentrations of the species within the mixture were extremely...
Orientation and capturing of antibody affinity ligands: applications to surface plasmon resonance biochips
13 June 2011, 23:17:36
Publication year: 2011
Source: Sensors and Actuators B: Chemical, In Press, Accepted Manuscript, Available online 13 June 2011
Gunnar, Bergström , Carl-Fredrik, Mandenius
A surface plasmon resonance (SPR) sensor chip with immobilized protein G was used for simultaneously capturing, purifying and orienting antibody ligands. The ligands were further stabilized by chemical cross-linking. This procedure of designing the sensor chip improved efficient use of the ligands and could prolong the analytical use.The procedure was evaluated on standard dextran-coated sensor chips onto which commercial semi-purified antibodies toward human serum albumin and human troponin where captured and used for analysing their antigens.The procedure demonstrates a general design approach for presenting the biorecognition element on a biosensor surface which enhances sensitivity, stability and selectivity at the same...
Source: Sensors and Actuators B: Chemical, In Press, Accepted Manuscript, Available online 13 June 2011
Gunnar, Bergström , Carl-Fredrik, Mandenius
A surface plasmon resonance (SPR) sensor chip with immobilized protein G was used for simultaneously capturing, purifying and orienting antibody ligands. The ligands were further stabilized by chemical cross-linking. This procedure of designing the sensor chip improved efficient use of the ligands and could prolong the analytical use.The procedure was evaluated on standard dextran-coated sensor chips onto which commercial semi-purified antibodies toward human serum albumin and human troponin where captured and used for analysing their antigens.The procedure demonstrates a general design approach for presenting the biorecognition element on a biosensor surface which enhances sensitivity, stability and selectivity at the same...
Lead detection in environmental water sample using an organoclay film-based attenuated total reflectance sensor
13 June 2011, 23:17:36
Publication year: 2011
Source: Sensors and Actuators B: Chemical, In Press, Accepted Manuscript, Available online 13 June 2011
John, Richardson , Amanda, Drake , Claire, Lazo-Miller , Jennifer, Hand , Thomas, Morgan , ...
A novel, portable and cost-effective optical sensor for lead detection in water has been developed, which combines a miniature sensing platform based on Multiple Internal Reflection Attenuated Total Reflectance (MIR-ATR) with a one-step synthesized thiolated organoclay thin film. This film is highly effective for the sequestration and pre-concentration of Pb2+ ions. Lead was detected with high sensitivity achieved through the combination of multiple internal reflections and large Pb2+ uptake capacity of the organoclay after forming bright yellow lead-thiolate (PbSx) complexes within the film. Un-optimized detection limits of 200 ppb Pb2+ in deionized water samples and slightly higher in Pb2+- spiked...
Source: Sensors and Actuators B: Chemical, In Press, Accepted Manuscript, Available online 13 June 2011
John, Richardson , Amanda, Drake , Claire, Lazo-Miller , Jennifer, Hand , Thomas, Morgan , ...
A novel, portable and cost-effective optical sensor for lead detection in water has been developed, which combines a miniature sensing platform based on Multiple Internal Reflection Attenuated Total Reflectance (MIR-ATR) with a one-step synthesized thiolated organoclay thin film. This film is highly effective for the sequestration and pre-concentration of Pb2+ ions. Lead was detected with high sensitivity achieved through the combination of multiple internal reflections and large Pb2+ uptake capacity of the organoclay after forming bright yellow lead-thiolate (PbSx) complexes within the film. Un-optimized detection limits of 200 ppb Pb2+ in deionized water samples and slightly higher in Pb2+- spiked...
High-precision interferometric monitoring of polymer swelling using a simple optofluidic sensor
13 June 2011, 23:17:36
Publication year: 2011
Source: Sensors and Actuators B: Chemical, In Press, Accepted Manuscript, Available online 13 June 2011
Gediminas, Gervinskas , Daniel, Day , Saulius, Juodkazis
Swelling of poly-methylmethacrylate (PMMA) in weak solvents - water, ethanol, and methanol was investigated by interferometry using a simplemicrofluidic sensor. A change of channel width by ±10nm, comparable with the surface roughness of the polymer surface, is reliably detected and its temporal evolution was monitored in situ. Dynamics of polymer swelling over time periods from a few seconds to a few days were obtained. An optimized inexpensive microfluidic sensor design using hot embossing with gold sputtering is presented. Such a sensor can be used for high-fidelity adsorption-desorption interferometric sensing and its cost can be optimized for a single use.
Source: Sensors and Actuators B: Chemical, In Press, Accepted Manuscript, Available online 13 June 2011
Gediminas, Gervinskas , Daniel, Day , Saulius, Juodkazis
Swelling of poly-methylmethacrylate (PMMA) in weak solvents - water, ethanol, and methanol was investigated by interferometry using a simplemicrofluidic sensor. A change of channel width by ±10nm, comparable with the surface roughness of the polymer surface, is reliably detected and its temporal evolution was monitored in situ. Dynamics of polymer swelling over time periods from a few seconds to a few days were obtained. An optimized inexpensive microfluidic sensor design using hot embossing with gold sputtering is presented. Such a sensor can be used for high-fidelity adsorption-desorption interferometric sensing and its cost can be optimized for a single use.
No comments:
Post a Comment