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Schottky-contacted vertically self-aligned ZnO nanorods for hydrogen gas nanosensor applications
Sapana Ranwa, Mohit Kumar, Jitendra Singh, Mattia Fanetti, Mahesh Kumar, 2015, original scientific article

Found in: ključnih besedah
Summary of found: ...ZnO, hydrogen sensor, nanosensor, cathodoluminescence...
Keywords: ZnO, hydrogen sensor, nanosensor, cathodoluminescence
Published: 18.04.2016; Views: 2588; Downloads: 0

Effect of gamma irradiation on Schottky-contacted vertically aligned ZnO nanorod-based hydrogen sensor
Sapana Ranwa, Surendra Singh Barala, Mattia Fanetti, Mahesh Kumar, 2016, original scientific article

Abstract: We report the impact of gamma irradiation on the performance of a gold Schottky-contacted ZnO nanorod-based hydrogen sensor. RF-sputtered vertically aligned highly c-axis-oriented ZnO NRs were grown on Si(100) substrate. X-ray diffraction shows no significant change in crystal structure at low gamma doses from 1 to 5 kGy. As gamma irradiation doses increase to 10 kGy, the single crystalline ZnO structure converts to polycrystalline. The photoluminescence spectra also shows suppression of the near-band emission peak and the huge wide-band spectrum indicates the generation of structural defects at high gamma doses. At 1 kGy, the hydrogen sensor response was enhanced from 67% to 77% for 1% hydrogen in pure argon at a 150 °C operating temperature. However, at 10 kGy, the relative response decreases to 33.5%. High gamma irradiation causes displacement damage and defects in ZnO NRs, and as a result, degrades the sensor's performance as a result. Low gamma irradiation doses activate the ZnO NR surface through ionization, which enhances the sensor performance. The relative response of the hydrogen sensor was enhanced by ∼14.9% with respect to pristine ZnO using 1 kGy gamma ray treatment. © 2016 IOP Publishing Ltd.
Found in: ključnih besedah
Keywords: ZnO, nanorods, gamma irradiation, sensor
Published: 12.01.2017; Views: 1640; Downloads: 0
.pdf Fulltext (4,60 MB)

New strategy for magnetic gas sensing
Roberta Ciprian, Piero Torelli, Angelo Giglia, B Gobaut, Barbara Ressel, Janez Štupar, Matija Stupar, Antonio Caretta, Giovanni De Ninno, Tommaso Pincelli, Barbara Casarin, Ganesh Adhikari, G Sberviglieri, C Baratto, Marco Malvestuto, 2016, original scientific article

Found in: ključnih besedah
Summary of found: ...hybrid nanostructures, sensor, absorption spectroscopy...
Keywords: hybrid nanostructures, sensor, absorption spectroscopy
Published: 05.02.2018; Views: 1199; Downloads: 0
.pdf Fulltext (2,25 MB)

A DNA origami plasmonic sensor with environment-independent read-out
Matjaž Valant, Mattia Fanetti, 2019, original scientific article

Found in: ključnih besedah
Keywords: DNA origami, plasmonic sensor, molecular detection, gold nanoparticle
Published: 08.11.2019; Views: 622; Downloads: 0
.pdf Fulltext (2,72 MB)

A multi-thermal-lens approach to evaluation of multi-pass probe beam configuration in thermal lens spectrometry
Humberto Cabrera, Leja Goljat, Dorota Korte, Ernesto Marin, Mladen Franko, original scientific article

Abstract: In this work, a recently proposed thermal lens instrument based on multi-pass probe beam concept is investigated and described as a multi-thermal-lens equivalent system. A simulation of the photothermal lens signal formation in a multi-thermal-lens equivalent configuration of the system is performed and validated by comparing the experimental signals of single, dual and ten-pass configurations to theoretically calculated values. The theoretically predicted enhancement of the signal is 9 to 10-fold for a weak thermal lens when comparing the ten-pass configuration with the conventional single-pass thermal lens system. Experimentally achieved signal enhancement in the ten-pass system is 8.3 for pure ethanol sample and between 8 and 9 for solutions with different concentrations of the Fe(II) - 1,10-Phenanthroline complex. Additionally, a value of 9.1 was calculated as the ratio of the slopes of the calibration lines obtained using the ten-pass and single-pass configurations. The achieved limit of detection for determination of Fe(II), in the ten-pass configuration, was 0.4 µgL-1, with a relative standard deviation around 4.5%, which compares favorably with previously reported results for TLS determination of Fe(II) in thin samples using low excitation power. For the multi-pass configuration the linear range of measurement is reduced when compared to the single-pass configuration. This is explained by the theoretical analysis of the photothermal signal under multi-pass condition, which shows the important contribution of the nonlinear term in the theoretical expression for the photothermal signal. The ten-pass configuration, which is presented and validated experimentally for the first time, offers important signal enhancement needed in recently developed TLS instruments with tunable, low power excitation sources.
Found in: ključnih besedah
Keywords: Thermal lens spectrometry, Photothermal detection, Trace determination, Chemical sensor
Published: 10.12.2019; Views: 581; Downloads: 0
.pdf Fulltext (656,75 KB)

Method and device for sensing humidity with reversible molecular dimerization and method for preparing the device
Endre Horvath, László Forró, Arnaud Magrez, Primož Rebernik Ribič, 2017, patent

Found in: ključnih besedah
Summary of found: ...humidity sensor, dimerisation, metachromasy...
Keywords: humidity sensor, dimerisation, metachromasy
Published: 20.02.2020; Views: 303; Downloads: 0

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