Self-maintained colorimetric acid/base sensor using polypyrrole actuator

Smyth, Ciarán; Lau, King Tong; Shepherd, Roderick; Diamond, Dermot; Wu, Yanzhe; Spinks, Geoffrey M.; Wallace, Gordon G.

doi:10.1016/j.snb.2007.08.050

Cited by 19 publications

(14 citation statements)

References 13 publications

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“…Similar results were found for Polyaniline (PAni) [59,60] and PPy [60,61] prepared by different methodologies, such as PAni nanocomposites [62], PAni-polyvinyl alcohol composite membranes [63], PAni nanofibers [64] and PPybromophenol blue composites [65], for pH determination in aqueous solutions and/or acid vapours. In such cases the colour variation was from green at pH = 4 through blue at pH = 7 and purple at pH = 12 for PAni [64], and from yellow in acidic medium (pH = 2) to blue in basic medium (pH = 10) for PPy-bromophenol blue composites [65].…”

Section: Influence Of the Ph In The Pmrpy Chromatic Changessupporting

confidence: 72%

A magenta polypyrrole derivatised with Methyl Red azo dye: synthesis and spectroelectrochemical characterisation

Almeida

Dias

Santos

et al. 2017

Electrochimica Acta

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Section: Influence Of the Ph In The Pmrpy Chromatic Changessupporting

confidence: 72%

A magenta polypyrrole derivatised with Methyl Red azo dye: synthesis and spectroelectrochemical characterisation

Almeida

Dias

Santos

et al. 2017

Electrochimica Acta

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“…The movement was obtained using a compact trilayer membrane comprising polypyrrole (PPy) outer films as actuating elements and a central polyvinylindene fluoride (PVDF) membrane as the central backing material. The pH sensor itself consisted of a polyethylene film coated with bromocresol green dye [10].…”

Section: Chemistrymentioning

confidence: 99%

“…For instance, fluorescence was employed for optical pH sensing with aminofluorescein as indicator [20], for detecting Li ions using two-color fluorescence [21], or for monitoring of commercial gasolines by quantifying the intensity of the Stokes-shifted fluorescence from some of the heavier polycyclic aromatic hydrocarbons C x H y , (x,y) ! (14,10), that are present in gasolines as minor constituents [22]. A fluorescence smart detector for capillary analysis was realized and employed for concentration and molecular discrimination from the average wavelength of fluorescence spectrum.…”

Section: Chemistrymentioning

confidence: 99%

Color Sensors and Their Applications

Puiu

2012

Springer Series on Chemical Sensors and Biosensors

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This chapter intends to provide an introduction to and a very brief summary of the principal categories of color sensors and of their applications, both relatively little known to the general public.First, an introduction describes the background of the topic(s) and the overall context. The main differences between two major but complementary techniques, colorimetry and spectrometry, will be presented here, as well as a quick summary of the scientific, technical, and industrial applications of color sensing. The second section will summarize the basic operational principles and architectures of color sensors realized in silicon. Although stand-alone detectors will also be described and discussed, the main focus will be on solid-state microsensors which can ideally be monolithically integrated together with signal processing circuits onto the same chip as "smart sensors" or intelligent microsystems. First, sensors realized only in monocrystalline silicon are summarized, followed then by those fabricated in other materials, with amorphous silicon and its alloys as the key players in this latter category.Finally, the chapter ends with the sections devoted to Conclusions and References. This chapter presents only a few of the most relevant aspects related to color sensors and examples of their practical applications. It is, in fact, an extensively abbreviated version of a much more detailed and exhaustive review dedicated to both color sensing and microspectrometry, and which is presently in preparation for future submission to Springer Verlag.

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“…using a Na + selective sensor) or indirectly by monitoring sweat pH. [59] In order to provide sensors with good sensitivity, selectivity and stability, various support materials, methods and reagents for immobilization of pH indicators were employed by our group [60,61] . In particular, ionic liquids (ILs) are rarely used in optical sensors in spite of their excellent chemical and thermal stabilities, low vapour pressure, high ionic conductivity and tuneable hydrophobic and hydrophilic nature [62] .…”

Section: Applications Of Ionogels: Sweat On a Chipmentioning

confidence: 99%

Wearable electrochemical sensors for monitoring performance athletes

Fraser¹,

Curto²,

Coyle³

et al. 2011

SPIE Proceedings

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Nowadays, wearable sensors such as heart rate monitors and pedometers are in common use. The use of wearable systems such as these for personalized exercise regimes for health and rehabilitation is particularly interesting. In particular, the true potential of wearable chemical sensors, which for the real-time ambulatory monitoring of bodily fluids such as tears, sweat, urine and blood has not been realized. Here we present a brief introduction into the fields of ionogels and organic electrochemical transistors, and in particular, the concept of an OECT transistor incorporated into a sticking-plaster, along with a printable "ionogel" to provide a wearable biosensor platform.

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Self-maintained colorimetric acid/base sensor using polypyrrole actuator

Cited by 19 publications

References 13 publications

A magenta polypyrrole derivatised with Methyl Red azo dye: synthesis and spectroelectrochemical characterisation

A magenta polypyrrole derivatised with Methyl Red azo dye: synthesis and spectroelectrochemical characterisation

Color Sensors and Their Applications

Wearable electrochemical sensors for monitoring performance athletes

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