[go: up one dir, main page]
More Web Proxy on the site http://driver.im/
You seem to have javascript disabled. Please note that many of the page functionalities won't work as expected without javascript enabled.
 
 
Sign in to use this feature.

Years

Between: -

Subjects

remove_circle_outline
remove_circle_outline

Journals

Article Types

Countries / Regions

Search Results (1)

Search Parameters:
Keywords = STFO

Order results
Result details
Results per page
Select all
Export citation of selected articles as:
849 KiB  
Article
Low Power Resistive Oxygen Sensor Based on Sonochemical SrTi0.6Fe0.4O2.8 (STFO40)
by Alisa Stratulat, Bogdan-Catalin Serban, Andrea De Luca, Viorel Avramescu, Cornel Cobianu, Mihai Brezeanu, Octavian Buiu, Lucian Diamandescu, Marcel Feder, Syed Zeeshan Ali and Florin Udrea
Sensors 2015, 15(7), 17495-17506; https://doi.org/10.3390/s150717495 - 20 Jul 2015
Cited by 14 | Viewed by 6818
Abstract
The current paper reports on a sonochemical synthesis method for manufacturing nanostructured (typical grain size of 50 nm) SrTi0.6Fe0.4O2.8 (Sono-STFO40) powder. This powder is characterized using X ray-diffraction (XRD), Mössbauer spectroscopy and Scanning Electron Microscopy (SEM), and results [...] Read more.
The current paper reports on a sonochemical synthesis method for manufacturing nanostructured (typical grain size of 50 nm) SrTi0.6Fe0.4O2.8 (Sono-STFO40) powder. This powder is characterized using X ray-diffraction (XRD), Mössbauer spectroscopy and Scanning Electron Microscopy (SEM), and results are compared with commercially available SrTi0.4Fe0.6O2.8 (STFO60) powder. In order to manufacture resistive oxygen sensors, both Sono-STFO40 and STFO60 are deposited, by dip-pen nanolithography (DPN) method, on an SOI (Silicon-on-Insulator) micro-hotplate, employing a tungsten heater embedded within a dielectric membrane. Oxygen detection tests are performed in both dry (RH = 0%) and humid (RH = 60%) nitrogen atmosphere, varying oxygen concentrations between 1% and 16% (v/v), at a constant heater temperature of 650 °C. The oxygen sensor, based on the Sono-STFO40 sensing layer, shows good sensitivity, low power consumption (80 mW), and short response time (25 s). These performance are comparable to those exhibited by state-of-the-art O2 sensors based on STFO60, thus proving Sono-STFO40 to be a material suitable for oxygen detection in harsh environments. Full article
(This article belongs to the Section Chemical Sensors)
Show Figures

Figure 1

Figure 1
<p>(<b>a</b>) O<sub>2</sub> resistive sensor structure employing a CMOS-compatible SOI micro-hotplate as substrate and Sono-STFO40 as sensing layer; (<b>b</b>) Top-view of the manufactured O<sub>2</sub> resistive sensor.</p>
Full article ">Figure 2
<p>Diagram of the experimental setup employed for O<sub>2</sub> detection measurements.</p>
Full article ">Figure 3
<p>X-ray diffractogram of (<b>a</b>) the Sono-STFO40 and (<b>b</b>) commercially available STFO60.</p>
Full article ">Figure 4
<p>The Mössbauer spectrum of Sono-STFO40.</p>
Full article ">Figure 5
<p>SEM micrographs of (<b>a</b>) commercial STFO60 (10 kX); (<b>b</b>) Sono-STFO40 (10 kX); (<b>c</b>) commercial STFO60 (50 kX); (<b>d</b>) Sono-STFO40 (50 kX).</p>
Full article ">Figure 6
<p>Oxygen sensor response in dry nitrogen atmosphere (1%–16% O<sub>2</sub>) for: (<b>a</b>) Sono-STFO40 and (<b>b</b>) STFO60.</p>
Full article ">Figure 7
<p>Normalized resistance <span class="html-italic">vs.</span> oxygen concentration for both Sono-STFO40 and STFO60.</p>
Full article ">Figure 8
<p>Sensor response in dry (RH = 0%) and humid nitrogen environment (RH = 60%) when employing (<b>a</b>) Sono-STFO40 and (<b>b</b>) STFO60, as sensing layers.</p>
Full article ">
Back to TopTop