Chemical sensors based upon polysiloxanes: comparison between optical, quartz microbalance, calorimetric, and capacitance sensors

Haug, M.; Schierbaum, K.D.; Gauglitz, G.; Göpel, Wolfgang

doi:10.1016/0925-4005(93)85278-i

Cited by 83 publications

(21 citation statements)

References 7 publications

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“…Ammonia sensing experiments revealed a decreased sensitivity with increasing temperature between 10 and 63 0 C, as shown in Figure 8B. The most likely explanation for this phenomenon is an increase of the gas/PANI partition of ammonia with increasing temperature, which is consistent with the explanations of Haug et al [21].…”

supporting

confidence: 71%

Electrochemically Functionalized Single‐Walled Carbon Nanotube Gas Sensor

et al. 2006

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We demonstrate a facile fabrication method to make chemical gas sensors using single-walled carbon nanotubes (SWNT) electrochemically functionalized with polyaniline (PANI). The potential advantage of this method is to enable targeted functionalization with different materials to allow for creation of high-density individually addressable nanosensor arrays. PANI-SWNT network based sensors were tested for on-line monitoring of ammonia gas. The results show a superior sensitivity of 2.44% DR/R per ppm v NH 3 (which is more than 60 times higher than intrinsic SWNT based sensors), a detection limit as low as 50 ppb v , and good reproducibility upon repeated exposure to 10 ppm v NH 3 . The typical response time of the sensors at room temperature is on the order of minutes and the recovery time is a few hours. Higher sensitivities were observed at lower temperatures. These results indicate that electrochemical functionalization of SWNTs provides a promising new method of creating highly advanced nanosensors with improved sensitivity, detection limit, and reproducibility.

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supporting

confidence: 71%

Electrochemically Functionalized Single‐Walled Carbon Nanotube Gas Sensor

et al. 2006

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“…) [124] Supramol. structures and chemical sensing (calix [4]resorcinarenes) [137] Comparison: optical, quartz microbal., calorimetric, and capacitance sensors [201] Chemical sensors [9] Progress in intrinsic fiber-optic chemical sensing D (72 refs. ) [291] Immunos.…”

Section: Generalmentioning

confidence: 99%

Opto-Chemical and Opto-Immuno Sensors

Gauglitz¹

1996

Sensors Update

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“…In this particular case, a mass-sensitive quartz microbalance oscillator was chosen to detect very small (nanogram) mass changes upon interaction of organic molecules with the receptor sites of the monolayer. More generally, other changes of physical and chemical properties, like dielectric or optical properties, may be detected with suitable electronic devices (7).…”

mentioning

confidence: 99%

Molecular Recognition by Self-Assembled Monolayers of Cavitand Receptors

Schierbaum

Weiß

Velzen³

et al. 1994

Science

328

179

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It is shown by angle-resolved x-ray photoelectron spectroscopy that cavitands derived from resorcin[4]arenes provided with four dialkylsulfide chains form stable monolayers on gold surfaces that are well organized by self-assembly. The cavitand headgroups at the surface of the resorcin[4]arene monolayer act as molecular recognition sites for small organic molecules with remarkable selectivity for perchloroethylene (C(2)Cl(4)). Comparative thermal desorption experiments indicate binding sites with high interaction energies of C(2)Cl(4) at the surface of the resorcin[4]arene monolayers. Fast and reversible "host-guest" interactions were found by the monitoring of extremely small mass changes (in the nanogram range) with a quartz microbalance oscillator provided with gold electrodes coated by resorcin[4]arene monolayers.

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Chemical sensors based upon polysiloxanes: comparison between optical, quartz microbalance, calorimetric, and capacitance sensors

Cited by 83 publications

References 7 publications

Electrochemically Functionalized Single‐Walled Carbon Nanotube Gas Sensor

Electrochemically Functionalized Single‐Walled Carbon Nanotube Gas Sensor

Opto-Chemical and Opto-Immuno Sensors

Molecular Recognition by Self-Assembled Monolayers of Cavitand Receptors

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