Results 71 to 80 of about 276,908 (308)

Improving the Detection Limit in a Capillary Raman System for In Situ Gas Analysis by Means of Fluorescence Reduction

Sensors, 2015
Raman spectroscopy for low-pressure or trace gas analysis is rather challenging, in particular in process control applications requiring trace detection and real-time response; in general, enhancement techniques are required.
Simone Rupp, Andreas Off, Hendrik Seitz-Moskaliuk, Timothy M. James, Helmut H. Telle   +4 more
doaj   +1 more source

Nitrogen Dioxide Gas Sensor Based on Ag-Doped Graphene: A First-Principle Study

Chemosensors, 2021
High-performance tracking trace amounts of NO2 with gas sensors could be helpful in protecting human health since high levels of NO2 may increase the risk of developing acute exacerbation of chronic obstructive pulmonary disease.
Qichao Li, Yamin Liu, Di Chen, Jianmin Miao, Xiao Zhi, Shengwei Deng, Shujing Lin, Han Jin, Daxiang Cui   +8 more
doaj   +1 more source

ENVISAT tropical validation of cloud and ozone parameters by high-altitude aircraft. [PDF]

, 2007
The validation of cloud top and ozone vertical column, measured by SCIAMACHY, were carried out respectively by lidars and in-situ and remote-sensing ozone instruments on-board the high altitude Geophysica aircraft.
Azzolini, R., Balestri, S., Blom, C., Ebersoldt, A., Gulde, T., Keim, C., Kostadinov, I., Lengel, A., Liu, G. Y., MacKenzie, A. Robert, Martinez, A. A., Petritoli, A., Piesch, C., Ravegnani, F., Stefanutti, Leopoldo   +14 more
core  

A method to detect baseline emission and plant damage induced volatile emission in a greenhouse [PDF]

, 2008
The objective of this research was to ascertain if 1) baseline emission and 2) damage induced emission of volatile plant substances could be detected under greenhouse conditions.
Bouwmeester, H.J., Henten, E., van, Hofstee, J.W., Jansen, R., Posthumus, M., Verstappen, F.W.A.   +5 more
core   +2 more sources

Bimetallic (NiFe) and Trimetallic (NiFeCr) Nanoalloys from Metal Oxides Using a Microwave Hydrogen Plasma

Advanced Engineering Materials, EarlyView.
Bimetallic (NiFe) and trimetallic (NiFeCr) nanoalloys (NAs) are synthesized using corresponding oxide mixtures using microwave hydrogen plasma within a few milliseconds. The process simultaneously 1) reduces metal oxides to metals; 2) downsizes the particles from micrometers to nanometers; and 3) blends the metals to form NAs.
Sachin Kumar, Mohammad Kazemi, Zichang Xiong, Thomas Cameron, Julian Held, Uwe Kortshagen   +5 more
wiley   +1 more source

Tailoring MXene Thickness and Functionalization for Enhanced Room-Temperature Trace NO2 Sensing

Nano-Micro Letters
Highlights Gas-phase functionalization of X-MXene (X = –F, –OH, –O, –Br, –I) films crafted from sub-100 nm thin MXene flakes for highly sensitive NO2 sensors.
Muhammad Hilal, Woochul Yang, Yongha Hwang, Wanfeng Xie   +3 more
doaj   +1 more source

In Situ Fabrication of SnS₂/SnO₂ Heterostructures for Boosting Formaldehyde−Sensing Properties at Room Temperature

Nanomaterials, 2023
Formaldehyde, as a harmful gas produced by materials used for decorative purposes, has a serious impact on human health, and is also the focus and difficulty of indoor environmental polution prevention; hence, designing and developing gas sensors for the
Dan Meng, Zongsheng Xie, Mingyue Wang, Juhua Xu, Xiaoguang San, Jian Qi, Yue Zhang, Guosheng Wang, Quan Jin   +8 more
doaj   +1 more source

Gas recognition based on the physicochemical parameters determined by monitoring diffusion rates in microfluidic channels [PDF]

, 2014
This paper was presented at the 4th Micro and Nano Flows Conference (MNF2014), which was held at University College, London, UK. The conference was organised by Brunel University and supported by the Italian Union of Thermofluiddynamics, IPEM, the ...
4th Micro and Nano Flows Conference (MNF2014), Erfantalab, S, Ghafarinia, V, Hossein-Babaei, F, Zare, AH   +4 more
core  

Sensitive Room Temperature Photoluminescence-Based Sensing of H2S with Novel CuO–ZnO Nanorods [PDF]

, 2016
Novel CuO nanoparticle-capped ZnO nanorods have been produced using a pulsed laser deposition (PLD) method. These nanorods are shown to grow by a CuO-nanoparticle-assisted vapour-solid-solid (V-S-S) mechanism.
Ashfold, Michael N R, Cao, Wenwu, Chen, Chong, Du, Baosheng, Liu, Xiao, Sun, Lei, Sun, Ye, Tang, Wei, Yang, Bin, Yin, Yongqi, Yu, Miao   +10 more
core   +3 more sources

Four‐Point Bending Tests at High Temperatures on Commercial MgO‐C Refractory Bricks with and Without Recyclate Considering Different Carbon Contents

Advanced Engineering Materials, EarlyView.
Four‐point bending tests are conducted in an argon atmosphere on commercial MgO‐C brick grades with and without MgO‐C recyclate from room temperature up to 1300 °C. No detrimental effect of the MgO‐C recyclates on bending strength is found. Instead, a decisive influence of the total carbon content is observed, with lower total carbon contents ...
Alexander Schramm, Lukas Knöchel, Thomas Schemmel, Christos G. Aneziris, Anja Weidner, Horst Biermann   +5 more
wiley   +1 more source