Recent developments in nanomaterial optical sensors

Shi, Jinjun; Zhu, Yongfa; Zhang, Xinrong; Baeyens, Willy R. G.; Garcı́a-Campaña, Ana M.

doi:10.1016/s0165-9936(04)00519-9

Cited by 179 publications

(89 citation statements)

References 97 publications

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“…[224][225][226] Miniaturization of sensors to nano-dimensions decreases their typical response time down to the millisecond time scale, exhibiting also spatial resolution at the nanometer scale. Due to their small dimensions, typically smaller than 100 nm, nanosensing probes will find applications in intracellular analysis and in the fabrication of high density sensor arrays.…”

Section: Nanoparticlesmentioning

confidence: 99%

“…29,84 The photostability of these miniaturized sensors is still a problem despite development of highly sensitive fluorescence detectors and the use of low light levels for excitation. 225 Fluorescent sensing nanoparticles have been developed based on the attachment of a silanized receptor and silanized fluorophore on the surface of commercial silica colloids, 77 the polymerization of a fluorescent derivative of a silanized receptor, 227,228 the binding of selective receptors to dye doped polymeric particles 53 or to quantum dots. 229 3.6.1 Silica and polymer-based nanoparticles.…”

Section: Nanoparticlesmentioning

confidence: 99%

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Design of fluorescent materials for chemical sensing

2007

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There is an enormous demand for chemical sensors for many areas and disciplines. High sensitivity and ease of operation are two main issues for sensor development. Fluorescence techniques can easily fulfill these requirements and therefore fluorescent-based sensors appear as one of the most promising candidates for chemical sensing. However, the development of sensors is not trivial; material science, molecular recognition and device implementation are some of the aspects that play a role in the design of sensors. The development of fluorescent sensing materials is increasingly captivating the attention of the scientists because its implementation as a truly sensory system is straightforward. This critical review shows the use of polymers, sol-gels, mesoporous materials, surfactant aggregates, quantum dots, and glass or gold surfaces, combined with different chemical approaches for the development of fluorescent sensing materials. Representative examples have been selected and they are commented here.

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Section: Nanoparticlesmentioning

confidence: 99%

Section: Nanoparticlesmentioning

confidence: 99%

Design of fluorescent materials for chemical sensing

2007

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“…In this sense, nanopore materials have proved attractive for optoelectronic, photonic, and sensor applications. [1][2][3][4][5] In particular, we have here described the porous anodic alumina ͑PA͒ films that comprise hexagonally packed pores with diameters at nanoscale range produced during aluminum anodization. 6 The geometric shape and porosity of the PA matrix can be tailored by the appropriate control of the anodization parameters.…”

mentioning

confidence: 99%

“…1,7 PA can therefore be easily employed as an anchor to immobilize specific organic molecules and serves as an active matrix for optical sensor purposes using the refractive index as transducer. 1,3,8 The PA exhibits a near-UV and visible luminescence at room temperature. [9][10][11] The particular active waveguide effect from PA luminescence can be tuned with luminescent polymers deposited over the alumina layer or embedded in their pores.…”

mentioning

confidence: 99%

Active waveguide effects from porous anodic alumina: An optical sensor proposition

Trivinho‐Strixino

Guerreiro

Gomes

et al. 2010

Applied Physics Letters

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“…6 Moreover, recent works have shown that thin NiO films are attractive sensing material in gas and humidity detection devices. 7,8 NiO thin films have been deposited by different techniques, including chemical self-assembly, 9 sol-gel, 10 RF, 11 DC sputtering 12 and recently pulsed laser deposition (PLD). 6,13,14 The preparation method is fundamental in determining the microstructure and consequently the functional properties of the synthesized materials.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen Microsensor Based on NiO Thin Films

Fasaki

Αντωνιάδου

Giannoudakos

et al.

NATO Science for Peace and Security Series B: Physics and Biophysics

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-A multitude of industries use H 2 either as part of their process or as a fuel. All these applications motivate nowadays the development of hydrogen sensor devices which enable its safe and controlled use. Since H 2 is explosive above the lower explosion limit at 40,000 ppm, devices which permit the detection of its presence and measure its concentration become indispensable. In this work, we present a microsensor based on NiO thin films produced with dc reactive magnetron sputtering on GaAs, with an incorporated Pt heater, all on a DO-8 package ready for use. The microsensor was tested to H 2 concentrations 5,000 and 10,000 ppm at different working temperatures. The change of the electrical resistance of NiO thin films was the signal for hydrogen sensing. The response of the sensor was not proportional to concentration of the gas neither to the working temperature.

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Recent developments in nanomaterial optical sensors

Cited by 179 publications

References 97 publications

Design of fluorescent materials for chemical sensing

Design of fluorescent materials for chemical sensing

Active waveguide effects from porous anodic alumina: An optical sensor proposition

Hydrogen Microsensor Based on NiO Thin Films

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