Gas-Sensing Materials

Watson, Joseph A.; Ihokura, Kousuke

doi:10.1557/s0883769400052453

Cited by 53 publications

(21 citation statements)

References 2 publications

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“…Dielectric materials that have a high reactivity with ions are used as either pH sensor or gas sensor. 17 However, because other ions within the sample media also affect the surface charge on the GOL, the electrical characteristics such as the threshold voltage and channel conductance will be influenced.…”

Section: Introductionmentioning

confidence: 99%

A strategy to minimize the sensing voltage drift error in a transistor biosensor with a nanoscale sensing gate

Son

Jeun

Choi

et al. 2017

IJN

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An ion-sensitive field-effect transistor (ISFET) biosensor is thought to be the center of the next era of health diagnosis. However, questions are raised about its functions and reliability in liquid samples. Consequently, real-life clinical applications are few in number. In this study, we report a strategy to minimize the sensing signal drift error during bioanalyte detection in an ISFET biosensor. A nanoscale SnO 2 thin film is used as a gate oxide layer (GOL), and the surface of the GOL is chemically modified for improving bioanalyte-specific binding and for reducing undesirable ion reactions in sample solutions. The ISFET biosensor with surface-modified GOL shows significantly reduced sensing signal error compared with an ISFET with bare GOL in both diluted and undiluted phosphate buffered saline solutions.

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Section: Introductionmentioning

confidence: 99%

A strategy to minimize the sensing voltage drift error in a transistor biosensor with a nanoscale sensing gate

Son

Jeun

Choi

et al. 2017

IJN

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“…The humidity sensors have been used in many fields such as meteorology, domestic environment, medicine, food industry, agriculture and so on [1]. Recently, it is reported that the use of nanostructures, such as nanoparticles, nanowires, nanotubes and polymer nanocomposites, as the humidity sensing materials could enhance the performance of humidity sensors greatly [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Capacitive humidity sensors based on Ni/SiNWs nanocomposites

Tao

Zhang

Miao

et al. 2009

Sensors and Actuators B: Chemical

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“…4 Detection of NH 3 , H 2 O, and ethanol are very important in industrial, medical, and living environments. 5,6 Their detection and quantification with high sensitivity, selectivity, and accuracy are required in many different circumstances. For example, accurate and rapid detection of ethanol is very important, in clinical and forensic analyses, in order to analyze human body fluids.…”

Section: Introductionmentioning

confidence: 99%

Sensitivity of Hydrogenated Silicon Nanodot on Small Polar Molecules

Zhang

Niehaus

et al. 2009

J. Theor. Comput. Chem.

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The interactions of a hydrogenated silicon nanodot, Si 35 H 36 , containing surface SiH and SiH 2 surface hydrides, with three representative small polar molecules, ethanol, NH 3 , and H 2 O were comparatively studied using a self-consistent charge density-functional tight-binding method, complemented by an empirical van der Waals force correction. The binding energy of ethanol with the hydrogenated silicon dot was determined to be 0.39-0.78 eV with a positive sign, indicating that this adsorption process is endothermic and thermodynamically unfavorable. In contrast, the binding energies of H 2 O and NH 3 were found to be about 0.15-0.53 eV with a negative sign, revealing exothermic and thermodynamically favorable reactions. Interestingly, these adsorptions are facilitated by H. . . H attraction, rather than by H. . . O or H. . . N H-bonding. The binding is mostly electrostatic and physical, with very little charge transfer occurring. All these adsorptions result in relatively small redshifts in optical absorption and emission spectra, according to additional time-dependent calculations, with little change in the IR peak position of their adsorbents and an almost perfect silicon surface.

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Gas-Sensing Materials

Cited by 53 publications

References 2 publications

A strategy to minimize the sensing voltage drift error in a transistor biosensor with a nanoscale sensing gate

A strategy to minimize the sensing voltage drift error in a transistor biosensor with a nanoscale sensing gate

Capacitive humidity sensors based on Ni/SiNWs nanocomposites

Sensitivity of Hydrogenated Silicon Nanodot on Small Polar Molecules

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