Room temperature gas sensor based on La2O3 doped CuO thin films

Rzaij, Jamal M.; Habubi, Nadir F.

doi:10.1007/s00339-020-03751-8

Cited by 24 publications

(7 citation statements)

References 31 publications

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“…A comparison to other sensor platforms using nanocrystalline zinc oxide sensors shows that the addition of aluminium as a dopant increases the sensitivity for hydrogen detection with an optimum increase for an addition of 3% [35]. Furthermore, other investigations show that CuO thin film sensors exhibit the highest sensitivity, with an addition of around 3% of Lanthanum in a sol-gel method fabrication process [36]. Interestingly, lower and higher dopant concentrations do not result in better sensor performance.…”

Section: Liquid Calibration Unit Measurementsmentioning

confidence: 94%

Optimization of Printed Polyaniline Composites for Gas Sensing Applications

Reiner‐Rozman

Pichler

Madi

et al. 2022

Sensors

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Polyaniline (PANI) films are promising candidates for electronic nose-based IoT applications, but device performances are influenced by fabrication parameters and ambient conditions. Affinities of different PANI composites to analytes for gas sensing applications remain elusive. In this study, we investigate the material properties in detail for two different dopant systems: F4TCNQ and carbon black. Using a reproducibility-driven approach, we investigate different dopant concentrations in regard to their sensitivity and specificity towards five relevant markers for breath cancer diagnosis. We benchmark the system using ammonia measurements and evaluate limits of detection. Furthermore, we provide statistical analysis on reproducibility and pave the way towards machine learning discrimination via principal component analysis. The influence of relative humidity on sensor hysteresis is also investigated. We find that F4TCNQ-doped PANI films show improved reproducibility compared to carbon black-doped films. We establish and quantify a tradeoff between sensitivity, reproducibility, and environmental stability by the choice of dopant and concentrations ratios.

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Section: Liquid Calibration Unit Measurementsmentioning

confidence: 94%

Optimization of Printed Polyaniline Composites for Gas Sensing Applications

Reiner‐Rozman

Pichler

Madi

et al. 2022

Sensors

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“…Nanostructures of tungsten trioxide (WO 3 ), tin dioxide (SnO 2 ), and zinc oxide (ZnO) have extensively been considered for NO 2 sensing because of their key attributes such as fast response and sensitive detection, portability, and cost-effectiveness. , Particularly, WO 3 is highly capable of NO 2 sensing owing to its unique selectivity to NO 2 , high catalytic activity, and low cost. ,− However, its NO 2 -sensing properties are still limited and can be further enhanced by optimizing its structural and chemical properties with effective preparation methods and appropriate catalytic additives. , Among available additives, transition metals including gold (Au), , zinc (Zn), silver (Ag), ruthenium (Ru), platinum (Pt), and lanthanum (La) − have been explored to augment gas selectivity and responsivity of WO 3 . Table reports NO 2 -sensing characteristics of nanomaterials based on WO 3 with different additives fabricated by several methods.…”

Section: Introductionmentioning

confidence: 99%

Flame-Spray-Synthesized La₂O₃-Loaded WO₃ Nanoparticle Films for NO₂ Sensing

Siriwalai

Punginsang

Inyawilert

et al. 2023

ACS Appl. Nano Mater.

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In this investigation, flame-made La 2 O 3 -loaded WO 3 nanoparticle films prepared with varying La contents (0−2 wt %) and spin-coating cycle numbers (1−6) were comprehensively explored for nitrogen dioxide (NO 2 ) detection. Detailed material analysis revealed the creation of secondary La 2 O 3 nanoparticles on primary monoclinic WO 3 nanoparticles. Gassensing measurements were conducted toward 50−5000 ppb NO 2 at 100−350 °C in dry and humid air (0−80 %RH). The obtained data dictated that the La content of 0.2 wt % and three spincoating cycles provided optimal NO 2 response and response time. Consequently, the 0.2 wt % La 2 O 3 -loaded WO 3 three-cycle spincoated film offered an ultrahigh response of ∼7213.6 and a response time of ∼31.8 s to 5000 ppb NO 2 at a low best sensing temperature of 150 °C in dry air. Moreover, high NO 2 selectivity was attained relative to CH

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“…Ancak, teorik verimin aksine deneysel olarak elde edilen verim değerlerinin düşük olduğu bildirilmiştir [8][9][10]. Optoelektronik uygulamaların [11] yanı sıra CuO ince filmler, lityum batarya [12], süper kapasitör [13] ve gaz sensörü [14] gibi aygıtların da bileşeni olarak kullanılmaktadır.…”

Section: Introductionunclassified

Alttaş Sıcaklığına Bağlı Olarak Ultrasonik Sprey Piroliz Yöntemi ile Üretilen CuO İnce Filmlerin İncelenmesi

LAPA

2022

Süleyman Demirel Üniversitesi Fen Edebiyat Fakültesi Fen Dergisi

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Öz: Bu çalışmada, CuO ince filmler, ultrasonik sprey piroliz (USP) yöntemi ile farklı alttaş sıcaklıklarında (350, 400, 450 ve 500 C) cam altlıklar üzerine biriktirilmiştir ve ardından 525 C'de tavlanmıştır. X-ışını kırınımı (XRD) analizlerinde, 350 C alttaş sıcaklığında ve tavlanmayan durumda ince filmlerde pik şiddetine rastlanmamıştır. Diğer filmlerin XRD desenlerinde 36º ve 39º'de iki belirgin pik gözlemlenmiştir. Bu pikler CuO'in monoklinik kristal yapısına ait karakteristik piklerdir. Atomik kuvvet mikroskobu (AFM) ve taramalı elektron mikroskobu (SEM) görüntülerinden, CuO ince filmlerin yüzeylerinin pürüzsüz olmadığı ve tavlama ile tane yığınlarının meydana geldiği gözlenmiştir. CuO ince filmlerin optik özellikleri ultraviyole-görünür bölge (UV-Vis) ölçümleri ile analiz edilmiştir. Tauc grafiklerinden yasak band aralığı değerleri (Eg), tavlanmamış ve tavlanan numuneler için hesaplanmıştır. USP yöntemiyle üretilen CuO ince filmlerin yapısal, morfolojik ve optik özelliklerinin alttaş sıcaklığı ile kontrol edilebileceği görülmüştür.

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Room temperature gas sensor based on La2O3 doped CuO thin films

Cited by 24 publications

References 31 publications

Optimization of Printed Polyaniline Composites for Gas Sensing Applications

Optimization of Printed Polyaniline Composites for Gas Sensing Applications

Flame-Spray-Synthesized La₂O₃-Loaded WO₃ Nanoparticle Films for NO₂ Sensing

Alttaş Sıcaklığına Bağlı Olarak Ultrasonik Sprey Piroliz Yöntemi ile Üretilen CuO İnce Filmlerin İncelenmesi

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Room temperature gas sensor based on La2O3 doped CuO thin films

Cited by 24 publications

References 31 publications

Optimization of Printed Polyaniline Composites for Gas Sensing Applications

Optimization of Printed Polyaniline Composites for Gas Sensing Applications

Flame-Spray-Synthesized La2O3-Loaded WO3 Nanoparticle Films for NO2 Sensing

Alttaş Sıcaklığına Bağlı Olarak Ultrasonik Sprey Piroliz Yöntemi ile Üretilen CuO İnce Filmlerin İncelenmesi

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Flame-Spray-Synthesized La₂O₃-Loaded WO₃ Nanoparticle Films for NO₂ Sensing