Polypyrrole nanofiber surface acoustic wave gas sensors

Al-Mashat, Laith; Tran, Henry D.; Włodarski, W.; Kaner, Richard B.; Kalantar‐zadeh, Kourosh

doi:10.1016/j.snb.2008.06.030

Cited by 124 publications

(46 citation statements)

References 40 publications

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“…Surface acoustic wave (SAW) transducers using conducting polymer nanofibers as the active sensing layer have also been used to detect a variety of chemical agents. [127][128][129][130] One of the most versatile materials for use in chemical sensors is PAni nanofibers. PAni can readily react with acids or bases to produce a conductivity change in the material due to PAni's doping/dedoping mechanism.…”

Section: Chemical Sensorsmentioning

confidence: 99%

One‐Dimensional Conducting Polymer Nanostructures: Bulk Synthesis and Applications

2009

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This Progress Report provides a brief overview of current research activities in the field of one‐dimensional (1D) conducting polymer nanostructures. The synthesis, properties, and applications of these materials are outlined with a strong emphasis on recent literature examples. Chemical methods that can produce 1D nanostructures in bulk quantities are discussed in the context of two different strategies: 1) procedures that rely on a nanoscale template or additive not inherent to the polymer and 2) those that do not. The different sub‐classifications of these two strategies are delineated and the virtues and vices of each area are discussed. Following this discussion is an outline of the properties and applications of 1D conducting polymer nanostructures. This section focuses on applications in which nanostructured conducting polymers are clearly advantageous over their conventional counterparts. We conclude with our perspective on the main challenges and future research directions for this new class of nanomaterials. This Progress Report is not intended as a comprehensive review of the field, but rather a summary of select contributions that we feel will provide the reader with a strong basis for further investigation into this fast emerging field.

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Section: Chemical Sensorsmentioning

confidence: 99%

One‐Dimensional Conducting Polymer Nanostructures: Bulk Synthesis and Applications

2009

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“…Electrospun poly(diphenylamine), a derivative of PANI, has also been used as an ammonia sensor with 1 ppm detection and 1.5 minute response time [21]. The work of Kaner and coworkers has focused on the sensing of hydrogen gas on either PANI fabricated by the rapid mixing method [22][23][24] or PPy using the 'quick shake' reaction [25,26]. Concentrations of 0.06% were readily detectable.…”

Section: Nanofibers and Nanocablesmentioning

confidence: 99%

Nanostructured Conducting Polymers for (Electro)chemical Sensors

Killard

2010

Nanostructured Conductive Polymers

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Conducting polymers have been investigated for many years now for their electrical and electrochemical properties. The moderate range of conducting polymers now available, their many derivatives, broad range of counter-ion doping options, level of proton doping, and the many synthetic routes result in a large range of material properties in terms of conductivity, chemical sensitivity, selectivity, and redox characteristics. This allows them to participate in many chemical interactions which are suitable for chemosensing applications.Nanotechnology allows conducting-polymer materials to be studied and applied to chemical sensing in a new way. Controlling the structure and morphology of conducting polymer materials at nanoscales brings the prospect of a range of enhancements not possible with traditional bulk materials. Traditional routes to polymer formation, such as chemical and electrochemical synthesis, lack any fine control on the tertiary structure of the growing polymer, and this lack of structural reproducibility has negative consequences for the performance of the material as a sensor interface. In addition, such polymerizations, Nanostructured Conductive PolymersEdited by Ali Eftekhari

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“…[13][14][15][16][17][18] So far, there are many reports about detection applications about SAW in terms of many fields especially in food analysis, such as monitoring of the growth of bacteria, detection of pancreatic lipase, and biomedical analysis, etc. [19][20][21][22] Currently, more and more researches focus on the chemical/biological modification about surface acoustic wave resonator (SAWR). If specific reaction (such as antigen-antibody, receptor-ligand interaction, etc) occurs during the processing, some information about wave (velocity, for example) will change accordingly when SAW passes the piezoelectric substrate resonator, which realizes the characterization about test sample's species and concentration.…”

Section: Introductionmentioning

confidence: 99%

Kiwi fruit (Actinidia chinensis) quality determination based on surface acoustic wave resonator combined with electronic nose

Liu

Hui

2015

Bioengineered

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Keywords: electronic nose, frequency, Kiwi fruit quality, signal-to-noise ratio, surface acoustic wave resonatorIn this study, electronic nose (EN) combined with a 433 MHz surface acoustic wave resonator (SAWR) was used to determine Kiwi fruit quality under 12-day storage. EN responses to Kiwi samples were measured and analyzed by principal component analysis (PCA) and stochastic resonance (SR) methods. SAWR frequency eigen values were also measured to predict freshness. Kiwi fruit sample's weight loss index and human sensory evaluation were examined to characteristic its quality and freshness. Kiwi fruit's quality predictive models based on EN, SAWR, and EN combined with SAWR were developed, respectively. Weight loss and human sensory evaluation results demonstrated that Kiwi fruit's quality decline and overall acceptance decrease during the storage. Experiment result indicated that the PCA method could qualitatively discriminate all Kiwi fruit samples with different storage time. Both SR and SAWR frequency analysis methods could successfully discriminate samples with high regression coefficients (R = 0.98093 and R = 0.99014, respectively). The validation experiment results showed that the mixed predictive model developed using EN combined with SAWR present higher quality prediction accuracy than the model developed either by EN or by SAWR. This method exhibits some advantages including high accuracy, non-destructive, low cost, etc. It provides an effective way for fruit quality rapid analysis.

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Polypyrrole nanofiber surface acoustic wave gas sensors

Cited by 124 publications

References 40 publications

One‐Dimensional Conducting Polymer Nanostructures: Bulk Synthesis and Applications

One‐Dimensional Conducting Polymer Nanostructures: Bulk Synthesis and Applications

Nanostructured Conducting Polymers for (Electro)chemical Sensors

Kiwi fruit (Actinidia chinensis) quality determination based on surface acoustic wave resonator combined with electronic nose

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