Electrospun Fluorescent Nanofibers for Explosive Detection

Anitha, S.; Uyar, Tamer

doi:10.1007/978-3-319-14406-1_8

Cited by 5 publications

(7 citation statements)

References 73 publications

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“…As a result of their sub‐micron dimensions, nanofibers possess unique properties including a high volume of small pores and a good inter‐pore connectivity, resulting in a remarkably high specific surface area . These properties are interesting for many application areas and particularly sensors, as a large specific surface area results in fast response times and ultra‐sensitivity . Compared to bulk materials, films and coatings, nanofibers are reported to enhance the sensitivity and responsivity of sensors .…”

Section: Introductionmentioning

confidence: 99%

“…For example, Hahn et al fabricated a sensor based on polyacrylonitrile nanofibers loaded with metal oxide semiconductors (Fe 2 O 3 , Ab‐SnO 2 , and ZnO) to detect CO 2 , which was visualized and quantified by FTIR spectroscopy . Optical nanofibrous sensors based on fluorescence involve quenching/regaining the fluorescence of the detection system due to the interaction with the analyte . This phenomenon is generally measured by Stern–Volmer plots and visualized by fluorescent microscopy.…”

Section: Introductionmentioning

confidence: 99%

“…This phenomenon is generally measured by Stern–Volmer plots and visualized by fluorescent microscopy. Many optical nanofibrous sensors for electron‐deficient compounds such as explosives and heavy metal ions have been designed based on this technique by either doping fluorescent compounds into the electrospinning solution, chemically modifying nanofibers, or “decorating” the surface of the nanofibers . Very often, these changes in fluorescence intensity can be seen with the naked eye or with the help of relatively simple equipment such as light emitting diode (LED) light sources, charge‐coulpled device (CCD) cameras or compact inexpensive spectrometers .…”

Section: Introductionmentioning

confidence: 99%

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Colorimetric Nanofibers as Optical Sensors

Schoolaert

Hoogenboom

Clerck

2017

Adv Funct Materials

109

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Sensors play a major role in many applications today, ranging from biomedicine to safety equipment, where they detect and warn us about changes in the environment. Nanofibers, characterized by high porosity, flexibility, and a large specific surface area, are the ideal material for ultrasensitive, fastresponding, and user-friendly sensor design. Indeed, a large specific surface area increases the sensitivity and response time of the sensor as the contact area with the analyte is enlarged. Thanks to the flexibility of membranes, nanofibrous sensors cannot only be applied in high-end analyte detection, but also in personal, daily use. Many different nanofibrous sensors have already been designed; albeit, the most straightforward and easiest-to-interpret sensor response is a visual change in color, which is of particular interest in the case of warning signals. Recently, many researchers have focused on the design of so-called colorimetric nanofibers, which typically involve the incorporation of a colorimetric functionality into the nanofibrous matrix. Many different strategies have been used and explored for colorimetric nanofibrous sensor design, which are outlined in this feature article. The many examples and applications demonstrate the value of colorimetric nanofibers for advanced optical sensor design, and could provide directions for future research in this area.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Colorimetric Nanofibers as Optical Sensors

Schoolaert

Hoogenboom

Clerck

2017

Adv Funct Materials

109

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“…Recent studies demonstrated electrospun nanofibers as an excellent matrix for protecting and enhancing the sensing performance of fluorescent gold nanoclusters and metallic nanoparticles [22][23][24][25][26]. The polysulfone fiber-based membranes received much attention in the field ranging from artificial kidneys for blood purification to water treatment and food processing, owing to their good permeability, mechanical, thermal, and biocompatible properties [27,28].…”

Section: Introductionmentioning

confidence: 99%

Ultrasensitive electrospun fluorescent nanofibrous membrane for rapid visual colorimetric detection of H2O2

et al. 2015

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We report herein a flexible fluorescent nanofibrous membrane (FNFM) prepared by decorating the gold nanocluster (AuNC) on electrospun polysulfone nanofibrous membrane for rapid visual colorimetric detection of H 2 O 2 . The provision of AuNC coupled to NFM has proven to be advantageous for facile and quick visualization of the obtained results, permitting instant, selective, and on-site detection. We strongly suggest that the fast response time is ascribed to the enhanced probabilities of interaction with AuNC located at the surface of NF. It has been observed that the color change from red to blue is dependent on the concentration, which is exclusively selective for hydrogen peroxide. The detection limit has been found to be 500 nM using confocal laser scanning microscope (CLSM), visually recognizable with good accuracy and stability. A systematic comparison was performed between the sensing performance of FNFM and AuNC solution. The underlying sensing mechanism is demonstrated using UV spectra, transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The corresponding disappearance of the characteristic emissions of gold nanoclusters and the emergence of a localized surface plasmon resonance (LSPR) band, stressing this unique characteristic of gold nanoparticles. Hence, it is evident that the conversion of nanoparticles from nanoclusters has taken place in the presence of H 2 O 2 . Our work here has paved a new path for the detection of bioanalytes, highlighting the merits of rapid readout, sensitivity, and user-friendliness.

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“…Therefore, a need for considerable effort towards the development of sensitive and selective sensor for on-site visual detection is the want of the hour. In recent years, major study has gone into the analysis of fluorescence based sensors owing to their high sensitivity, ease of operation, time-efficiency and sensitivity characteristics 4 5 6 7 8 . Moreover, significant progress has also been made to develop a variety of fluorescent probes and subsequent color changes with their aggregation in the presence of analytes has been investigated and studied in the recent past 9 10 11 .…”

mentioning

confidence: 99%

Immobilization of gold nanoclusters inside porous electrospun fibers for selective detection of Cu(II): A strategic approach to shielding pristine performance

Anitha

Çelebioğlu

Balusamy

et al. 2015

Sci Rep

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Here, a distinct demonstration of highly sensitive and selective detection of copper (Cu2+) in a vastly porous cellulose acetate fibers (pCAF) has been carried out using dithiothreitol capped gold nanocluster (DTT.AuNC) as fluorescent probe. A careful optimization of all potential factors affecting the performance of the probe for effective detection of Cu2+ were studied and the resultant sensor strip exhibiting unique features including high stability, retained parent fluorescence nature and reproducibility. The visual colorimetric detection of Cu2+ in water, presenting the selective sensing performance towards Cu2+ ions over Zn2+, Cd2+ and Hg2+ under UV light in naked eye, contrast to other metal ions that didn’t significantly produce such a change. The comparative sensing performance of DTT.AuNC@pCAF, keeping the nonporous CA fiber (DTT.AuNC@nCAF) as a support matrix has been demonstrated. The resulting weak response of DTT.AuNC@nCAF denotes the lack of ligand protection leading to the poor coordination ability with Cu2+. The determined detection limit (50 ppb) is far lower than the maximum level of Cu2+ in drinking water (1.3 ppm) set by U.S. Environmental Protection Agency (EPA). An interesting find from this study has been the specific oxidation nature between Cu2+ and DTT.AuNC, offering solid evidence for selective sensors.

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Electrospun Fluorescent Nanofibers for Explosive Detection

Cited by 5 publications

References 73 publications

Colorimetric Nanofibers as Optical Sensors

Colorimetric Nanofibers as Optical Sensors

Ultrasensitive electrospun fluorescent nanofibrous membrane for rapid visual colorimetric detection of H2O2

Immobilization of gold nanoclusters inside porous electrospun fibers for selective detection of Cu(II): A strategic approach to shielding pristine performance

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