Chemical Sensors: Definitions and Classification

Hulanicki, Adam; Głąb, Stanisław; Ingman, Folke

doi:10.1515/iupac.63.0073

Cited by 31 publications

(38 citation statements)

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“…MIP based sensors have been discussed as promising materials for different fields such as clinical, bioanalytical, process control and environmental applications [58]. A sensor itself is defined as a device that comprises a recognition element and a transducer that converts the chemical information into measurable signal [59]. Experts believe that in a near future MIP based sensors will compete with analytical techniques like liquid chromatography, mass spectrometry, spectroscopic methods among others [60].…”

Section: Mip Based Sensorsmentioning

confidence: 99%

Applications of molecularly imprinted polymers to the analysis and removal of personal care products: A review

Figueiredo

Erny

Santos

et al. 2016

Talanta

145

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Personal-care products (PCPs) involve a variety of chemicals whose persistency along with their constant release into the environment raised concern to their potential impact on wildlife and humans health. Regarded as emergent contaminants, PCPs demonstrated estrogenic activity leading to the need of new methodologies to detect and remove those compounds from the environment.Molecular imprinting starts with a complex between a template molecule and a functional monomer, which is then polymerized in the presence of a cross-linker. After template removal, the polymer will contain specific cavities. Based on a good selectivity towards the template, molecularly imprinted polymers (MIPs) have been investigated as efficient materials for the analysis and extraction of the so called emergent pollutants contaminants.Rather than lowering the limit of detections, the key theoretical advantage of MIP over existing methodologies is the potential to target specific chemicals. This unique feature, sometime named specificity (as synonym to very high selectivity) allows to use cheap, simple and/or rapid quantitative techniques such as fast separation with ultra-violet (UV) detection, sensors or even spectrometric techniques. When a high degree of selectivity is achieved samples extracted with MIPs can be directly analysed without the need of a separation step. However, while some papers clearly demonstrated the specificity of their MIP toward the targeted PCP, such prove is often lacking, especially with real matrices, making it difficult to assess the success of the different approaches.This review paper focusses on the latest development of MIPs for the analysis of personal care products in the environment, with particular emphasis on design, preparation and practical applications of MIPs.3

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Section: Mip Based Sensorsmentioning

confidence: 99%

Applications of molecularly imprinted polymers to the analysis and removal of personal care products: A review

Figueiredo

Erny

Santos

et al. 2016

Talanta

145

View full text Add to dashboard Cite

show abstract

“…For these reasons, a detailed study of the physical-chemical properties of both constituents should be performed. The device requires the efficient immobilization of antibodies, peptides, aptamers, or nucleic acids over the surface of a transducer, which are responsible for the analyte recognition and will execute a measurable response signal proportional to the analyte concentration [71][72][73][74]. Besides covalent functionalization of nanoparticles (known for allowing a strong and controlled immobilization of the probe over the surface of the sensor), most immobilization strategies involve simple methods.…”

Section: Biosensors For Hpv As Alternative Diagnostic Toolsmentioning

confidence: 99%

“…The incursion of nanotechnology into biology has been catalyzed by the positive and important role that analytical methodologies and automation have over the equipment efficiency and effectivity, thus allowing the rapid progression of sensor systems [63,79]. Nowadays, we are presented with innumerous types of transducers that can be used for the construction of biosensors, and according to the physical principle of transduction, we find it easy to classify them into electrochemical, optical, piezoelectric, and magnetic [72,73,80,81]. Along with a representation of a generic biosensor constructed for HPV detection, we show in Figure 1 the main signal transduction methods currently used.…”

Section: Biosensors For Hpv As Alternative Diagnostic Toolsmentioning

confidence: 99%

Trends in Biosensors for HPV: Identification and Diagnosis

et al. 2015

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The conventional methodologies used for the detection of human papillomavirus (HPV) present actually robust and reproducible advantages. However, at the same time, they involve complex protocols that sometimes are difficult to popularize. Over the first half of XX century, the adequate treatment of complex and delicate processes from a simple instrumental base seemed a fundamental and intrinsic contradiction. However, interdisciplinary trends have allowed the manipulation of tissues, proteins, and nucleic acids through innovative increasingly smaller devices. The proper diagnosis of HPV has seen great advances since biosensor researchers are employing its virus strains as models to study the interactions between the biorecognition element and the transducer. Additionally, all recent improvements and trends that material sciences, biotechnology, and data processing scientists excel for biosensors can be applied for the HPV detection platforms. In this review, we highlight the recent trends on materials, nanomaterials, and transducers for the specific detection and differentiation of HPV strains. The most influential methods for the detection and identification of these papillomaviruses include optical, electrochemical, and piezoelectric transducers; we will visit their sensibility and advantages. Additionally, we highlight the factors that contributed to the increasing importance of these biodevices as potential substitutes to conventional diagnostic methods.

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“…Assim, para gerar o sinal que o sensor químico necessita, os dispositivos devem executar funções como transporte da amostra, processamento do sinal, armazenamento dos dados, entre outras funções que tornem o sistema autônomo [28,29]. Esse método é baseado na equação de Nernst, que relaciona o potencial galvânico de um conjunto de eletrodos e a atividade química da concentração de íons a ser medida [35].…”

Section: Sensores Químicosunclassified

Integração de microssensores a microlaboratórios autônomos através de técnicas de montagem por viragem (Flip-Chip).

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Chemical Sensors: Definitions and Classification

Cited by 31 publications

References 0 publications

Applications of molecularly imprinted polymers to the analysis and removal of personal care products: A review

Applications of molecularly imprinted polymers to the analysis and removal of personal care products: A review

Trends in Biosensors for HPV: Identification and Diagnosis

Integração de microssensores a microlaboratórios autônomos através de técnicas de montagem por viragem (Flip-Chip).

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