کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7837154 1504164 2018 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The Lord Armstrong's experiment in the view of band theory of liquid water
ترجمه فارسی عنوان
آزمایش لرد آرمسترانگ در نظر تئوری باند آب مایع
کلمات کلیدی
آب مایع، حالت غیر استئیومتریک، فاصله باند، سطح فرمی، سطوح اهدا کننده و گیرنده الکترونیکی، پل شناور آب
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
چکیده انگلیسی
Liquid water considered in the band theory differs from the ice by localization of electrons in “tails” of the allowed energy bands separated by the wide band gap which defines electrochemical properties of water by means of the allowed energy levels above the middle of the band gap, εH3O, as electronic donors and below, εOH, as their acceptors. The population of electrons [H3O]/[H3O+] and holes [OH]/[OH-] on these levels depends on Fermi level in the band gap. This variable electrochemical potential (as a p-n boundary between the vacant impurity levels and the ones occupied by electrons) becomes the tool for changing physical and chemical properties of liquid water. It turned out that a noticeable shift of Fermi level (more than 1 eV) is possible in the band gap at the expense of an insignificant (|z|<10-10) deviation of the water composition H2O1-z from the stoichiometric water, H2O. This deviation is easily homogenized in the bulk liquid. Then, one can introduce into pure water a negative charge [H3O+OH-]∼10-7M or the positive one [H3O++OH]∼10-7M by shifting Fermi level up to the donor or acceptor levels in the band gap. These charged molecular pairs (H2O)2- and (H2O)2+ organize the two-way “traffic” in the aqueous “floating bridge” between two glass beakers with the pure liquid water under action of the high dc voltage in the Lord Armstrong's experiment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics - Volume 508, 31 May 2018, Pages 45-50
نویسندگان
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