Laser-grown ZnO nanowires for room-temperature SAW-sensor applications

Marcu, Aurelian; Viespe, Cristian

doi:10.1016/j.snb.2014.10.141

Cited by 32 publications

(25 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The center-to-center distance between IDTs was 10 mm. The IDTs were obtained using standard photolithographic techniques, and consist in a 150-nm thick gold layer on top of a 10 nm chromium layer, the latter ensuring good adhesion to the quartz substrate [ 27 , 28 , 29 , 30 ]. The 10 × 38 mm 2 quartz substrate was cut at a 45° angle, in order to reduce the effect of spurious SAW reflection from the edge of the piezoelectric substrate [ 31 ].…”

Section: Methodsmentioning

confidence: 99%

Surface Acoustic Wave Sensor with Pd/ZnO Bilayer Structure for Room Temperature Hydrogen Detection

Viespe

Miu

2017

Sensors

Self Cite

View full text Add to dashboard Cite

A Surface Acoustic Wave (SAW) hydrogen sensor with a Pd/ZnO bilayer structure for room temperature sensing operation has been obtained by Pulsed Laser Deposition (PLD). The sensor structure combines a Pd layer with optimized porosity for maximizing mass effects, with the large acoustoelectric effect at the Pd/ZnO interface. The large acoustoelectric effect is due to the fact that ZnO has a surface conductivity which is highly sensitive to chemisorbed gases. The sensitivity of the sensor was determined for hydrogen concentrations between 0.2% and 2%. The limit of detection (LOD) of the bilayer sensor was about 4.5 times better than the single ZnO films and almost twice better than single Pd films.

show abstract

Section: Methodsmentioning

confidence: 99%

Surface Acoustic Wave Sensor with Pd/ZnO Bilayer Structure for Room Temperature Hydrogen Detection

Viespe

Miu

2017

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…For all types of sensors, including SAW sensors, it is important to operate at RT, and at the same time, to ensure that a signal is obtained at the lowest analyte concentrations. The reference metal oxide semiconductors used in the domain of sensors include In 2 O 3 [ 34 , 107 , 108 , 109 , 110 ], ZnO [ 45 , 111 , 112 , 113 ], Co 3 O 4 [ 114 , 115 , 116 ], SnO 2 [ 99 , 117 ], CuO/Cu 2 O [ 100 , 118 ], TiO 2 [ 24 , 119 ], NiO [ 58 , 120 ], Fe 2 O 3 [ 121 , 122 ], and WO 3 [ 23 , 123 ]. They were most often used to detect volatile organic compounds, hydrogen, ammonia, etc.…”

Section: Sensitive Materials Used In Gas Detectionmentioning

confidence: 99%

“…Among the gases most targeted for detection using ZnO- and ZnO-based materials in SAW sensors, as shown in Table 2 , are hydrogen [ 45 , 112 ], acetone [ 100 , 165 ], hydrogen sulfide [ 82 , 166 ], ethanol [ 44 , 100 ], and ammonia [ 80 , 150 ]. Of these, most RT SAW sensors were made for hydrogen, ammonia and ethanol, for which sensitivities between 11 and 0.005 Hz/ppm were obtained ( Table 2 ) [ 1 ].…”

Section: Zno In Saw Sensorsmentioning

confidence: 99%

ZnO Metal Oxide Semiconductor in Surface Acoustic Wave Sensors: A Review

Constantinoiu

Viespe

2020

Sensors

Self Cite

View full text Add to dashboard Cite

Surface acoustic wave (SAW) gas sensors are of continuous development interest to researchers due to their sensitivity, short detection time, and reliability. Among the most used materials to achieve the sensitive film of SAW sensors are metal oxide semiconductors, which are highlighted by thermal and chemical stability, by the presence on their surface of free electrons and also by the possibility of being used in different morphologies. For different types of gases, certain metal oxide semiconductors are used, and ZnO is an important representative for this category of materials in the field of sensors. Having a great potential for the development of SAW sensors, the discussion related to the development of the sensitivity of metal oxide semiconductors, especially ZnO, by the synthesis method or by obtaining new materials, is suitable and necessary to have an overview of the latest results in this domain.

show abstract

“…There is a new trend and curiosity for researchers in the last decade to develop transparent detectors such as gas and photodetectors. [1,2] Nowadays, photodetectors have been studied to be used in switching, imaging scanners, light sensors, touch panels, etc [3,4] and the broad spectral response have started to attract more attention due to their chromatic response that can be realized in a single photodetector. [5,6] Zhu et al [7] proposed a light-sensing feature of the Bi-Te-based flexible thin-film solar thermoelectric generator while Zheng et al [1] reported on a nanofiber array of flexible ZnO-CdO UV photodetectors with a 95% transparency.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of CdO Nanoflowers by Sol‐Gel Method on Different Substrates with Photodetection Application

Rajput

Pathak

Swart

et al. 2019

Physica Status Solidi (a)

View full text Add to dashboard Cite

To understand the effect of the substrate nature on the cadmium oxide (CdO) thin film, the properties such as structural, surface morphological, elemental, optical, and electrical are studied to optimize it for photodetection applications. The structural results indicate that the cubic crystal structure of the CdO formed on all substrates consists of crystallites with a 28–45 nm average size. The morphological micrographs show a dependency on the substrate type with a flower‐like shape of the CdO particles that are grown on all the substrates except for the indium tin oxide (ITO)‐coated glass. The energy dispersive X‐ray spectroscopy spectra and mapping images confirm the uniform distribution of the cadmium and oxygen. The CdO thin film on the fused silica glass (FSG) shows a high transmittance with a 2.05 eV bandgap. I–V characteristics present a good electrical conductivity of CdO thin film on the soda lime glass (SLG) substrate. The photodetecting characteristic of the SLG thin films as a visible light sensor is studied and is found to have a good stability with 225 and 475 s response and recovery times, respectively.

show abstract

Laser-grown ZnO nanowires for room-temperature SAW-sensor applications

Cited by 32 publications

References 27 publications

Surface Acoustic Wave Sensor with Pd/ZnO Bilayer Structure for Room Temperature Hydrogen Detection

Surface Acoustic Wave Sensor with Pd/ZnO Bilayer Structure for Room Temperature Hydrogen Detection

ZnO Metal Oxide Semiconductor in Surface Acoustic Wave Sensors: A Review

Synthesis of CdO Nanoflowers by Sol‐Gel Method on Different Substrates with Photodetection Application

Contact Info

Product

Resources

About