Room temperature detection of NO2 gas using optical sensor based on surface plasmon resonance technique

Paliwal, Ayushi; Sharma, Anjali; Tomar, Monika; Gupta, Vinay

doi:10.1016/j.snb.2015.03.095

Cited by 60 publications

(31 citation statements)

References 36 publications

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“…A full-width-halfmaximum (FWHM) analysis is carried out to investigate the selectivity capability of SPR sensor. Sharper SPR dip will produce smaller value of FWHM, which leads to the excellent selectivity capability due to the improvement of sensor resolution [27]. Fig.3 depicts the SPR curves for various structures of SF11 prisms consist of conical, hemispherical, half cylindrical and triangular structures; with refractive index of 1.77 (type SF11).…”

Section: Methodsmentioning

confidence: 99%

Optimization of SPR signals: Monitoring the physical structures and refractive indices of prisms

Mukhtar

Halim²,

Hassan

2017

EPJ Web Conf.

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Abstract. Surface plasmon resonance (SPR) can only be achieved if sufficient energy is provided at the boundary between metal and dielectric. An employment of prism as a light coupler by using Kretschmann configuration is one of the alternative for the production of adequate energy to be generated as surface plasmon polaritons (SPP). This work is carried out to investigate the effect of physical structure of the prism and its refractive index to the excitation of SPPs. A 50nm gold thin metal film with dielectric constant of ε=-12.45i+1.3 was deposited on the hypotenuse surface of the prisms. The physical structures of the prisms were varied such as triangular, conical, hemispherical and half cylindrical. These prisms were classified into two types of refractive indices (RI), namely n=1.51(type BK7) and n=1.77(type SF11). Based on SPR curve analyses, we discovered that strong SPR signals which consist of 82.98% photons were excited as SPPs can be obtained by using type-BK7 prism with physical structures of hemispherical or half cylindrical. From the view of selectivity ability as sensors, the usage of type-SF11 prisms (half cylindrical and hemispherical) able to enhance this impressive feature in which sharp SPR curves with small FWHM values were obtained. In conclusion, apart from properties of thin film materials, the physical structure of prisms and their RI values play crucial roles to obtain optimum SPR signal. High sensitivity SPR sensor can be established with the appointment of type-BK7 prisms (hemispherical or half cylindrical shape) as light couplers.

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Section: Methodsmentioning

confidence: 99%

Optimization of SPR signals: Monitoring the physical structures and refractive indices of prisms

Mukhtar

Halim²,

Hassan

2017

EPJ Web Conf.

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“…Accordingly, various types of gas sensors have been studied and developed constantly. Among them, four representative types of gas sensors are introduced here: resistor-type [1][2][3][4][5][6][7][8][9][10][11][12][13], optical [14][15][16], electrochemical [17][18][19], and field-effect transistor-type (FET-type) gas sensors [20][21][22][23][24][25][26][27][28][29][30][31][32]. Resistor-type gas sensor is one of the most studied types of gas sensors.…”

Section: Various Types Of Gas Sensorsmentioning

confidence: 99%

“…Optical gas sensors, in general, contain three major parts of light source, gas chamber, and light detector as depicted in Fig. 1.2 [16]. Every gas has its own absorbing property to light source at a specific wavelength.…”

Section: Various Types Of Gas Sensorsmentioning

confidence: 99%

A Si FET-type Gas Sensor with Pulse-driven Localized Micro-heater for Low Power Consumption

Hong

Jang

et al. 2018

2018 IEEE International Electron Devices Meeting (IEDM)

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“…To predict whether there is NO 2 gas in the surrounding environment, the effective detection technology was indispensable. So far, detection means for monitoring NO 2 gas can be classified as optical, electrochemical, and chemiresistive sensing technology. However, regardless of using optical or electrochemical method, some drawbacks were inevitably encountered, including sophisticated and expensive apparatus, intricate sample treatment as well as the poor portability, which severely restricted their practical application in special occasions, such as in combustion and automotive monitoring systems .…”

Section: Introductionmentioning

confidence: 99%

Room‐Temperature NO₂ Gas Sensing with Ultra‐Sensitivity Activated by Ultraviolet Light Based on SnO₂ Monolayer Array Film

Liu

Luo

et al. 2019

Adv Materials Inter

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It is, therefore, urgent to take actions to address this issue. To predict whether there is NO 2 gas in the surrounding environment, the effective detection technology was indispensable. So far, detection means for monitoring NO 2 gas can be classified as optical, [5][6][7] electrochemical, [8][9][10] and chemiresistive sensing [11][12][13] technology. However, regardless of using optical or electrochemical method, some drawbacks were inevitably encountered, including sophisticated and expensive apparatus, intricate sample treatment as well as the poor portability, which severely restricted their practical application in special occasions, such as in combustion and automotive monitoring systems. [14,15] Alternatively, by means of the merits of the low-cost, miniaturization, and easy integration, the chemiresistive-type sensing technology was thus a particular promising candidate for the realization of both on-site and real-time detection. Generally, thermal-activated and ultraviolet (UV)-light driven gas sensors stand for two complementary chemiresistivetype gas sensing technologies. [16,17] Even though the thermaldriven type provided high sensitivity with a rapid response/ recovery speed, it would suffer from high operating temperature. [18,19] Undesirably, maintaining high operating temperature during the gas sensing process undoubtedly leaded to the following issues. On the one hand, an explosive potential possibly occurred when sensors were exposed into flammable and explosive gases, such as H 2 , CO, CH 4 , and NO. On the other hand, the elevated temperature with a long time enabled the regrowth of grains, leading to the decrease of sensitivity and poor long-term stability. To avoid above issue, the low temperature NO 2 sensors are the ideal choice. At present, it can realize low temperature NO 2 sensing by the UV-light activation or without the presence of the UV-light irradiation. However, for the case of the absence of the UV-light activation, the NO 2 sensors usually show the very slow response/recovery speed, [20][21][22][23][24] which is bad for the practical detection application. Alternatively, the emergence of UV-light illuminated mode can effectively avoid above shortcomings, because it offers a very low working temperature and fast response/recovery speed. To date, the related researches about UV-light irradiated gas sensors have been appeared. For example, Jiang et al. used polyporous SnO 2 -ZnO composites as sensors to detect the formaldehyde gas under the Chemiresistive-type gas sensors, which are driven by the thermal activation, have exhibited extraordinary promise for the detection of air pollutions, such as highly toxic gas of nitrogen dioxide (NO 2 ), but are often limited to its high operating temperature, because of the raising explosive risk in inflammable gases. This study reports the construction of a close-packed SnO 2 monolayer film, and uses it as the NO 2 room-temperature sensing layer induced by ultraviolet (UV)-light irradiation. Such SnO 2 monolayer array film shows excellent s...

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Room temperature detection of NO2 gas using optical sensor based on surface plasmon resonance technique

Cited by 60 publications

References 36 publications

Optimization of SPR signals: Monitoring the physical structures and refractive indices of prisms

Optimization of SPR signals: Monitoring the physical structures and refractive indices of prisms

A Si FET-type Gas Sensor with Pulse-driven Localized Micro-heater for Low Power Consumption

Room‐Temperature NO₂ Gas Sensing with Ultra‐Sensitivity Activated by Ultraviolet Light Based on SnO₂ Monolayer Array Film

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Room temperature detection of NO2 gas using optical sensor based on surface plasmon resonance technique

Cited by 60 publications

References 36 publications

Optimization of SPR signals: Monitoring the physical structures and refractive indices of prisms

Optimization of SPR signals: Monitoring the physical structures and refractive indices of prisms

A Si FET-type Gas Sensor with Pulse-driven Localized Micro-heater for Low Power Consumption

Room‐Temperature NO2 Gas Sensing with Ultra‐Sensitivity Activated by Ultraviolet Light Based on SnO2 Monolayer Array Film

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Room‐Temperature NO₂ Gas Sensing with Ultra‐Sensitivity Activated by Ultraviolet Light Based on SnO₂ Monolayer Array Film