کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1171669 1491177 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
pH-sensitive diamond field-effect transistors (FETs) with directly aminated channel surface
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
pH-sensitive diamond field-effect transistors (FETs) with directly aminated channel surface
چکیده انگلیسی

We have introduced pH sensors fabricated on diamond thin films through modification of the surface-terminated atom. We directly modified the diamond surface from hydrogen to amine or oxygen with ultraviolet (UV) irradiation under ammonia gas. The quantified amine site based on the spectra obtained by X-ray photoelectron spectroscopy (XPS) is 26% (2.6 × 1014 cm−2) with UV irradiation for 8 h and its coverage is dependent on the UV irradiation time. This directly aminated diamond surface is stable with long-term exposure in air and electrolyte solution. We fabricated diamond solution-gate field-effect transistors (SGFETs) without insulating layers on the channel surface. These diamond SGFETs with amine modified by direct amination are sensitive to pH (45 mV/pH) over a wide range from pH 2 to 12 and their sensitivity is dependent on the density of binding sites corresponding to UV irradiation time on the channel surface.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Analytica Chimica Acta - Volumes 573–574, 28 July 2006, Pages 3–8
نویسندگان
, , , , , ,