Selective calcium ion detection with functionalized ZnO nanorods-extended gate MOSFET

Asif, Muhammad; Nur, Omer; Willander, Magnus; Danielsson, Bengt

doi:10.1016/j.bios.2009.04.011

Cited by 64 publications

(41 citation statements)

References 34 publications

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“…The above described ZnO NWs sensors would be useless if the signal obtained from them is too weak to be interfaced to conventional electronic circuits. Nevertheless, results of coupling ZnO NW-based sensors indicate that the signal is strong enough to be detected by conventional electronic components for ampliϐication, i.e., transistors [47,48]. Using ZnO NWs grown on Ag thin wire, the coupling to conventional electronics was demonstrated for the sensing of calcium ions and glucose [47,48].…”

Section: Interfacing Zno Nanowire-based Sensors With Conventional Elementioning

confidence: 99%

Piezoelectric Nanogenerator Based on ZnO Nanomaterials

2014

Zinc Oxide Nanostructures

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In general, nanostructures with relatively small sizes constitute excellent signal transduction elements when dealing with biological analytes or chemical species. The reason for this is the similarity of the order of size between nanostructures and biological analytes and chemical species. The consequence of this issue is the fact that nanostructures will possess relatively very high sensitivity for detection of the biological analytes and chemical species compared to conventional large bulk sensors. In addition, sensors based on nanostructures can operate efϐiciently when the detection is for situations where the available sample volume is small and the concentration of the element of analyte in question is low. This is in fact a very important advantage of nanostructure-based sensors. Among the various known nanostructures, nanowires (NWs) and nanorods (NRs), with their relatively high-surface-area-to-volume ratio, constitute excellent signal transduction elements and have other advantages due to their geometrical features. On the other hand,

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Section: Interfacing Zno Nanowire-based Sensors With Conventional Elementioning

confidence: 99%

Piezoelectric Nanogenerator Based on ZnO Nanomaterials

2014

Zinc Oxide Nanostructures

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“…A typical example of nanoscale materials is zinc oxide (ZnO), a wide band gap n-type semiconductor (3.37 eV) with large exciton binding energy of 60 meV at room temperature. Due to these properties, ZnO have been utilized in numerous applications such as gas sensors [2], transparent electrodes [3], pH sensors [4], biosensors [5], acoustic wave devices [6] and UV-photodiodes [7]. Over the years, a number of investigations have focused on the synthesis of nano and microarchitectures using different methods such as hydrothermal [8], sol-gel [9], electrochemical deposition [10] and vapor-phase process [11].…”

Section: Introductionmentioning

confidence: 99%

Time growing comparison for ZnO nanorod by using microwave irradiation method

Ismail

Ibrahim

Khairuddean

et al. 2014

J Sol-Gel Sci Technol

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In this study, zinc oxide (ZnO) nanorod were successfully prepared at different growth times (15, 30 and 60 min) using the microwave irradiation method. The ZnO nanorods were simply synthesized at a low temperature (90°C) with low power microwave assisted heating (about 100 W) and a subsequent ageing process. The synthesized nanorod were characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) and Ultraviolet-Visible spectroscopy (UV-Vis). The FESEM images showed nanorods with diameter ranging between 50 and 150 nm, and length of 150-550 nm. The XRD results indicate that ZnO nanorods of different time of growth exhibits pure wurtzite structure with lattice parameters of 3.2568 and 5.2125 Å . UV-Vis characterization showed that energy gap decreases with increase in time. The result also shows that growth of ZnO at 60 min produces an energy band gap of 3.15 eV. In general, the results of the study confirm that the microwave irradiation method is a promising low temperature, cheap and fast method for the production of ZnO nanostructures.

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“…12 For biological measurements, it has been known that sensors of the nanosize regime are essential for minimally invasive cellular monitoring. Nanosensors have been prepared by using various metals for many analytes, including calcium, 13 oxygen, 14 potassium, 15 zinc 16 and magnesium. 17 The devices that take advantage of the high specificity of biological reactions for detecting target analytes are known as biosensors.…”

Section: Introductionmentioning

confidence: 99%

Biomedical applications of nanobiosensors: the state-of-the-art

Rai¹,

Gade²,

Gaikwad³

et al. 2012

J. Braz. Chem. Soc.

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O desenvolvimento de nanobiosensores é um dos avanços mais recentes no campo da nanotecnologia. A investigação sobre nanobiosensores ópticos com dimensões submicrométricas tem aberto novos horizontes para as medições intracelulares. Aproveitando as propriedades únicas dos nanomateriais, nanobiosensores mais rápidos e sensíveis podem ser desenvolvidos. Além de serem sensíveis e rápidos, os estudos de nanobiosensores têm voltado seus esforços para o desenvolvimento de sensores baseados em nanomateriais que são acessíveis, robustos e reprodutíveis. Os nanobiosensores estão equipados com sondas biorreceptoras imobilizadas, por exemplo, anticorpos, substrato de enzima. A excitação por laser é transmitida para o sistema fotométrico na forma de sinal óptico (fluorescência). Os nanobiosessores poderão revolucionar no futuro o diagnóstico de doenças. A presente revisão discute os conceitos básicos, a evolução e as aplicações biomédicas de nanobiosensores.Development of nanobiosensor is one of the most recent advancement in the field of Nanotechnology. Research on optical nanobiosensors with submicron-sized dimensions has opened new horizons for intracellular measurements. Taking advantage of the unique properties of the nanomaterials, faster and sensitive nanobiosensors can be developed. Apart from being sensitive and fast, the studies related to nanobiosensors have geared their efforts towards the development of nanomaterial-based sensors that are affordable, robust and reproducible. The nanobiosensors are equipped with immobilized bioreceptor probes, e.g., antibodies, enzyme substrate. Laser excitation is transmitted to photometric system in the form of optical signal (fluorescence). Nanobiosensors will revolutionize the future of disease diagnosis. The present review discusses the basic concepts, developments and the biomedical applications of nanobiosensors.

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Selective calcium ion detection with functionalized ZnO nanorods-extended gate MOSFET

Cited by 64 publications

References 34 publications

Piezoelectric Nanogenerator Based on ZnO Nanomaterials

Piezoelectric Nanogenerator Based on ZnO Nanomaterials

Time growing comparison for ZnO nanorod by using microwave irradiation method

Biomedical applications of nanobiosensors: the state-of-the-art

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