Enhanced sensitivity of SAW gas sensor coated molecularly imprinted polymer incorporating high frequency stability oscillator

Wang, Wen; He, Shan; Li, Shunzhou; Liu, Minghua; Pan, Yong

doi:10.1016/j.snb.2007.02.037

Cited by 107 publications

(45 citation statements)

References 9 publications

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“…Since then the molecular imprinting technique started to develop flourishingly. Molecularly imprinted polymers prepared through MIT have many characteristics, such as high affinity and selectivity, strong ability in an anti-adverse environment, good stability, long service life, wide application range and so on; they have been used in many fields, including chromatographic analysis [4,5], solid phase extraction [6,7], biosensors [8,9], membrane technology [10,11] and so on.Quinolones (QNs), which have undergone rapid development in the past 20 years, are a kind of important broad-spectrum antibiotics. They are used extensively for treatment, prevention and growth promotion [12].…”

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confidence: 99%

Synthesis and characterization of molecularly imprinted polymers for recognition of ciprofloxacin

Liu

Zhang

et al. 2008

Front. Chem. China

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A molecularly imprinted polymer (MIP), with special molecule recognition properties of ciprofloxacin (CIP), was prepared by thermal polymerization in which ciprofloxacin acted as template molecule, a-methacrylic acid (MAA) acted as functional monomer and trimethylolpropane trimethylacrylate (TRIM) acted as crosslinker. The optimized ratio was determined to be n(CIP): n (MMA):n(TRIM) 5 1:6:16 by investigation of the effects of different concentrations of functional monomer and the crosslinker on the MIP's recognition properties. Equilibrium binding experiment was used to investigate the adsorption dynamics, the binding ability to template molecule and the substrate selectivity. Scatchard analysis was used to study the MIP's binding characteristic to template molecule. The results indicated that MIP has higher adsorption ability and selectivity. The equilibrium distribution coefficient K D was 41.64 and the separation factor a was 1.62. Scatchard analysis showed that two different kinds of binding sites were produced in the polymer matrix and their dissociation constants were calculated to be K d 1 5 5.249 6 10 2 5 mol?L 2 1 , K d 2 5 2.237 6 10 23 mol?L 21 .Molecular imprinting technology (MIT) refers to the preparation of a polymer with special recognition properties of a specific target molecule (template molecule, imprinted molecule) [1]. Wulff [2] gave the first report of a synthetic molecularly imprinted polymer in 1972, and Mosbach [3] issued a molecularly imprinted polymer of theophylline which was prepared under the intermolecular interaction principle in Nature in 1993. Since then the molecular imprinting technique started to develop flourishingly. Molecularly imprinted polymers prepared through MIT have many characteristics, such as high affinity and selectivity, strong ability in an anti-adverse environment, good stability, long service life, wide application range and so on; they have been used in many fields, including chromatographic analysis [4,5], solid phase extraction [6,7], biosensors [8,9], membrane technology [10,11] and so on.Quinolones (QNs), which have undergone rapid development in the past 20 years, are a kind of important broad-spectrum antibiotics. They are used extensively for treatment, prevention and growth promotion [12]. As one of the most representative third-generation quinolones, ciprofloxacin has excellent antibacterial activity. Thus far, cyclopropyl has been considered as the best 1-substituent. This change in structure is significant in the history of the development of quinolone antibiotics [13]. Close attention has been widely paid to the residue problem, such as drug resistance of pathogenic bacteria and potential carcinogenicity of some quinolones [12][13][14], but it is difficult to analyze the residue of QNs accurately due to severe matrix interferences and low levels of drug residue. The authors wish, through this paper, to achieve the elimination of matrix interference and establish effective purification by using MIP with special recognition properties. Caro and Mar...

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confidence: 99%

Synthesis and characterization of molecularly imprinted polymers for recognition of ciprofloxacin

Liu

Zhang

et al. 2008

Front. Chem. China

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“…Some widely used variants include pure polymers, functional organic polymers, molecularly imprinted polymers, self-assembled polymers, and polymer composites [16,110]. The sensors based on polymer films have usually short response and recovery times as they generally absorb the gases via physisorption.…”

Section: Advances In Saw-based Chemical Sensingmentioning

confidence: 99%

SAW Sensors for Chemical Vapors and Gases

Devkota

Ohodnicki

Greve

2017

Sensors

229

147

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Surface acoustic wave (SAW) technology provides a sensitive platform for sensing chemicals in gaseous and fluidic states with the inherent advantages of passive and wireless operation. In this review, we provide a general overview on the fundamental aspects and some major advances of Rayleigh wave-based SAW sensors in sensing chemicals in a gaseous phase. In particular, we review the progress in general understanding of the SAW chemical sensing mechanism, optimization of the sensor characteristics, and the development of the sensors operational at different conditions. Based on previous publications, we suggest some appropriate sensing approaches for particular applications and identify new opportunities and needs for additional research in this area moving into the future.

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“…Such an approach is most often presented in many papers concerning the topic mainly due to its relative simplicity [1][2][3][4][5]. However, the cost of simplicity are such drawbacks like frequency instability, oscillation fading, significant limitations of SAW surface load, dependence on signal and environment parameters changes etc.…”

Section: Introductionmentioning

confidence: 99%

New Approach to SAW Gas Sensors Array Response Measurement

2011

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Majority papers concerning surface acoustic wave sensors technology is devoted to the analysis of self--oscillating circuits with surface acoustic wave device and its basic frequency changes in particular. Such circuits are widely used mainly due to their relative simplicity. Unfortunately the price of the simplicity is such drawbacks like frequency instability, sensitivity to unwanted factors, surface acoustic wave surface load limit etc. A new approach to the analysis of surface acoustic wave gas sensors response is proposed in the paper. The approach significantly eliminates the disadvantages of commonly used so far methods of analysis.

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Enhanced sensitivity of SAW gas sensor coated molecularly imprinted polymer incorporating high frequency stability oscillator

Cited by 107 publications

References 9 publications

Synthesis and characterization of molecularly imprinted polymers for recognition of ciprofloxacin

Synthesis and characterization of molecularly imprinted polymers for recognition of ciprofloxacin

SAW Sensors for Chemical Vapors and Gases

New Approach to SAW Gas Sensors Array Response Measurement

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