Improved Long-Term Responses of Au-Decorated Si Nanowire FET Sensor for NH<sub>3</sub> Detection

Kim, Donghoon; Park, Chanoh; Choi, Woong; Shin, Seonghwan; Jin, Bo; Baek, Rock‐Hyun; Lee, Jeong-Soo

doi:10.1109/jsen.2019.2952582

Cited by 32 publications

(21 citation statements)

References 42 publications

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“…The decoration of the SiNW surface with AuNPs is an effective method to realize nanowire FET-type sensors with high sensitivity and high reliability for chemical sensing applications [148]. The sensing mechanism is the same as what we have discussed before for PdNPs [148]. It is also worth noting that Au modified SiNWs used to detect CO 2 [149].…”

Section: Decoration By Metal Nanoparticlesmentioning

confidence: 82%

“…The operation in the subthreshold regime provides higher sensitivity, lower power consumption, and sufficient linearity. The decoration of the SiNW surface with AuNPs is an effective method to realize nanowire FET-type sensors with high sensitivity and high reliability for chemical sensing applications [148]. The sensing mechanism is the same as what we have discussed before for PdNPs [148].…”

Section: Decoration By Metal Nanoparticlesmentioning

confidence: 82%

“…Kim et al demonstrated the NH 3 sensing characteristics of SiNW FETs with AuNPs decoration to enhance the sensitivity and long-term stability [148]. The operation in the subthreshold regime provides higher sensitivity, lower power consumption, and sufficient linearity.…”

Section: Decoration By Metal Nanoparticlesmentioning

confidence: 99%

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Silicon Nanowires for Gas Sensing: A Review

et al. 2020

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The unique electronic properties of semiconductor nanowires, in particular silicon nanowires (SiNWs), are attractive for the label-free, real-time, and sensitive detection of various gases. Therefore, over the past two decades, extensive efforts have been made to study the gas sensing function of NWs. This review article presents the recent developments related to the applications of SiNWs for gas sensing. The content begins with the two basic synthesis approaches (top-down and bottom-up) whereby the advantages and disadvantages of each approach have been discussed. Afterwards, the basic sensing mechanism of SiNWs for both resistor and field effect transistor designs have been briefly described whereby the sensitivity and selectivity to gases after different functionalization methods have been further presented. In the final words, the challenges and future opportunities of SiNWs for gas sensing have been discussed.

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Section: Decoration By Metal Nanoparticlesmentioning

confidence: 82%

Section: Decoration By Metal Nanoparticlesmentioning

confidence: 82%

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Silicon Nanowires for Gas Sensing: A Review

et al. 2020

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“…This way, the response is much higher and the limit of detection (LoD) is in parts per billion (ppb). Silicon and metal oxide nanowires have been studied as ammonia sensors [ 19 , 20 , 21 , 22 , 23 , 24 ]. Nanowires are commonly used as a porous thin film on which metal electrodes are deposited [ 25 , 26 ] but they can also be grown directly from the electrodes [ 27 , 28 ] or even contacted individually [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

Quantitative Assessment of Trout Fish Spoilage with a Single Nanowire Gas Sensor in a Thermal Gradient

et al. 2021

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The response of a single tin oxide nanowire was collected at different temperatures to create a virtual array of sensors working as a nano-electronic nose. The single nanowire, acting as a chemiresistor, was first tested with pure ammonia and then used to determine the freshness status of trout fish (Oncorhynchus mykiss) in a rapid and non-invasive way. The gas sensor reacts to total volatile basic nitrogen, detecting the freshness status of the fish samples in less than 30 s. The sensor response at different temperatures correlates well with the total viable count (TVC), demonstrating that it is a good (albeit indirect) way of measuring the bacterial population in the sample. The nano-electronic nose is not only able to classify the samples according to their degree of freshness but also to quantitatively estimate the concentration of microorganisms present. The system was tested with samples stored at different temperatures and classified them perfectly (100%), estimating their log(TVC) with an error lower than 5%.

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“…Due to these advantages, several FET-based sensors have been adapted to chemical and biological detection. Moreover, many types of semiconductor materials with quasi-one-dimensional nanostructures, such as nanobelts and nanowires [ 27 , 28 , 29 , 30 ], have been applied to FET-based sensors. FET-based sensors in conjunction with nanostructures have demonstrated exceptional sensitivity as a result of their large surface-area-to-volume ratios.…”

Section: Introductionmentioning

confidence: 99%

Effects of Buffer Concentration on the Sensitivity of Silicon Nanobelt Field-Effect Transistor Sensors

Wang

2021

Sensors

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In this work, a single-crystalline silicon nanobelt field-effect transistor (SiNB FET) device was developed and applied to pH and biomolecule sensing. The nanobelt was formed using a local oxidation of silicon technique, which is a self-aligned, self-shrinking process that reduces the cost of production. We demonstrated the effect of buffer concentration on the sensitivity and stability of the SiNB FET sensor by varying the buffer concentrations to detect solution pH and alpha fetoprotein (AFP). The SiNB FET sensor was used to detect a solution pH ranging from 6.4 to 7.4; the response current decreased stepwise as the pH value increased. The stability of the sensor was examined through cyclical detection under solutions with different pH; the results were stable and reliable. A buffer solution of varying concentrations was employed to inspect the sensing capability of the SiNB FET sensor device, with the results indicating that the sensitivity of the sensor was negatively dependent on the buffer concentration. For biomolecule sensing, AFP was sensed to test the sensitivity of the SiNB FET sensor. The effectiveness of surface functionalization affected the AFP sensing result, and the current shift was strongly dependent on the buffer concentration. The obtained results demonstrated that buffer concentration plays a crucial role in terms of the sensitivity and stability of the SiNB FET device in chemical and biomolecular sensing.

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Improved Long-Term Responses of Au-Decorated Si Nanowire FET Sensor for NH₃ Detection

Cited by 32 publications

References 42 publications

Silicon Nanowires for Gas Sensing: A Review

Silicon Nanowires for Gas Sensing: A Review

Quantitative Assessment of Trout Fish Spoilage with a Single Nanowire Gas Sensor in a Thermal Gradient

Effects of Buffer Concentration on the Sensitivity of Silicon Nanobelt Field-Effect Transistor Sensors

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Improved Long-Term Responses of Au-Decorated Si Nanowire FET Sensor for NH3 Detection

Cited by 32 publications

References 42 publications

Silicon Nanowires for Gas Sensing: A Review

Silicon Nanowires for Gas Sensing: A Review

Quantitative Assessment of Trout Fish Spoilage with a Single Nanowire Gas Sensor in a Thermal Gradient

Effects of Buffer Concentration on the Sensitivity of Silicon Nanobelt Field-Effect Transistor Sensors

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Improved Long-Term Responses of Au-Decorated Si Nanowire FET Sensor for NH₃ Detection