کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
817471 1469413 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Evolution of nano-junctions in piezoresistive nanostrand composites
ترجمه فارسی عنوان
تکامل نانو اتصالات در کامپوزیت های نانوستراند پیزورزیستی
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
چکیده انگلیسی

When nickel nanostrands (NiNs) are embedded inside of highly flexible silicone, the silicone becomes an extremely piezoresistive sensor capable of measuring a large dynamic range of strains. These sensors experience an increase in conductance of several orders of magnitude when strained to 40% elongation. It has been hypothesized that this effect stems from a net change in average junction distance between the conductive particles when the overall material is strained. The quantum tunneling resistance across these gaps is highly sensitive to junction distance, resulting in the immense piezoresistive effect. In this paper, the average junction distance is monitored using dielectric spectroscopy while the material is strained. By incorporating new barrier height measurements of the base silicone material from a nanoindentation experiment, this experiment validates previous assumptions that, on average, the junctions between NiNs decrease while the sample is strained, instigating the large piezoresistive effect. The nature of the material’s response to strain is explored and discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Composites Part B: Engineering - Volume 72, April 2015, Pages 45–52
نویسندگان
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