کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5009408 1462044 2017 21 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Self-heating hydrogen gas sensor based on an array of single suspended carbon nanowires functionalized with palladium nanoparticles
ترجمه فارسی عنوان
سنسور گاز هیدروژن خود گرمایی بر اساس یک آرایه از نانوسیم های کربنی معلق که با نانوذرات پالادیوم کار می کنند
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
This study reports the development of a novel hydrogen gas sensor based on an array of single suspended carbon nanowires (diameter ∼200 nm, length ∼100 μm) decorated with Pd nanoparticles (PdNPs) of various sizes for room temperature H2 gas sensing. These sensors provide high sensitivity, a wide sensing range (10 ppm - 5%), and complete gas response recovery in 5 s with ultralow power consumption (30 μW). Such performance is achieved using a novel suspended PdNP/carbon nanowire architecture, which offers enhanced mass transfer, high surface area to volume ratios, and good thermal insulation. This platform can be fabricated using simple batch microfabrication processes including carbon-MEMS and electrodeposition. The sensitivity and range of the sensor can be modulated by controlling Pd nanoparticle sizes (3-5 nm PdNPs: 3.2% ppm−1/2, 10-1000 ppm; 10-15 nm PdNPs: 0.32% ppm−1/2, 700 ppm - 5%). A wide sensing range is achieved by integrating nanowires with various sizes of PdNPs onto a chip. The electrical resistance of a suspended PdNP/carbon nanowire quickly and completely recovers its original state in a very short time via ultralow-power, Joule heat-based self-heating. This enables reproducible and long-term durable gas sensing.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 247, August 2017, Pages 564-572
نویسندگان
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