Chemical sensors based on nano-polymer films

Салихов, Р. Б.; Лачинов, А. Н.; Rakhmeev, R. G.; Gadiev, R. M.; Yusupov, A. R.; Салазкин, С. Н.

doi:10.1007/s11018-009-9277-4

Cited by 20 publications

(10 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here, we studied thin films of samples in order to create thin-film-resistive chemical humidity sensors . Polymer films were obtained by centrifugation from solutions of polymers in DMF.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Physicochemical Properties of Poly(2-ethyl-3-methylindole)

et al. 2020

View full text Add to dashboard Cite

Intramolecular acid-catalyzed cyclization was suggested for the first time for a polyaniline derivative, namely, poly[2-(2-chloro-1-methylbut-2-en-1-yl)aniline] (PClPA), to give hitherto unknown poly(2-ethyl-3-methylindole) (2E3MPIn) in a high yield (81%). This is the first example of synthesizing a polymer of the indole series with 1,5-addition of monomeric units that are incorporated into the polymer structure. The physicochemical properties of the new polymer were studied. Its structure was confirmed by spectral methods and quantum-chemical calculations. The 2E3MPIn polymer showed good thermal stability compared to the starting PClPA polymer. A study of the photoluminescence of polymers showed that the emission spectrum of 2E3MPIn demonstrated a bathochromic shift (16 nm) and a considerable increase in the luminescence intensity in comparison to PClPA. The 2E3MPIn sample was found to possess photoconductivity. Irradiation of the polymer film increases the electrical conductivity by a factor of 2. The electrochemical properties obtained from the UV–vis spectrum and cyclic voltammograms suggest that 2E3MPIn has good electroactivity. A sample of 2E3MIn demonstrates a fine porous structure resembling a “sponge”. In addition, the PClPA and 2E3MPIn samples synthesized were used as sensitive materials in resistive moisture sensors. The 2E3MPIn polymer demonstrated a higher response than PClPA to changes in the environment humidity. The observed changes in the physicochemical properties of 2E3MPIn compared to PClPA confirm that the polyheterocyclization reaction occurs successfully and can be considered as an efficient way for synthesizing new functional polymers of the indole series.

show abstract

“…Here, we studied thin films of samples in order to create thin-film-resistive chemical humidity sensors . Polymer films were obtained by centrifugation from solutions of polymers in DMF.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Physicochemical Properties of Poly(2-ethyl-3-methylindole)

et al. 2020

View full text Add to dashboard Cite

show abstract

“…It is established that conductivity is determined by the type and degree of external influence. It is shown that development of chemical sensors, e.g., relative humidity sensors, ethyl alcohol vapors pressure sensors and pH indicators is possible on the base of this interface [52].…”

Section: Polaron Transportmentioning

confidence: 99%

Charge transport in thin polymer films

Салихов¹,

Salikhov²

2015

LoM

Self Cite

View full text Add to dashboard Cite

In recent years, researchers' attention is drawn not only to the development of an increasing number of different elements of nanoelectronics based on polymer films, but also to the study of electrical properties and the carrier transport mechanisms in these films. This article describes the features of charge transport, including the phenomena at the interface between the polymer and the metal electrode, and in the bulk of the polymer film. The transfer of charge carriers in the polymer layers are mainly determined by the process of hopping between localized molecular states. The simplest form of the hopping conductivity is realized in the transitions between the nearest neighboring centers. The features of the hopping conductivity with a variable hopping and hopping transport in centers with a Gaussian distribution of energy levels were analyzed. The model of polarons and the dependence of the mobility of polarons on the temperature and field were reviewed. It was shown, that, the field dependence of the Poole-Frenkel has a place for both pure charge transfer and the polaron transfer. To describe the charge transport across the border between the polymer and the electrode in sufficiently strong electric fields the models of Fowler-Nordheim tunneling and Richardson-Schottky thermionic emission were used.

show abstract

“…The following are the sensory properties of samples with interface between two dielectric polymer films [27]. In order to explain what part of a specimen is sensitive to a change in humidity (interface layer at the boundary of two polymer films or bulk material), the current-voltage (I-V) characteristics were measured for specimens with a single film and lower arrangement of paired electrodes.…”

Section: Sensory Propertiesmentioning

confidence: 99%

Smart Polymers as Basic for Bio-, Chemical and Physical Sensors

Лачинов

Gadiev

Салихов

et al. 2014

Nanotechnology in the Security Systems

Self Cite

View full text Add to dashboard Cite

Dielectric materials found more application in electronics during the last decade's. Among wide range of nonconjugated polymers should be noted. This paper gives the basic results of nonconjugated polymers research made by Ufa group. The peculiarities of electron transport in polymers are shown. The possibilities of application of such materials in basic for bio-, chemical and physical sensors are considered.

show abstract

Chemical sensors based on nano-polymer films

Cited by 20 publications

References 5 publications

Synthesis and Physicochemical Properties of Poly(2-ethyl-3-methylindole)

Synthesis and Physicochemical Properties of Poly(2-ethyl-3-methylindole)

Charge transport in thin polymer films

Smart Polymers as Basic for Bio-, Chemical and Physical Sensors

Contact Info

Product

Resources

About