New strategies for the synthesis of t-selenium nanorods and nanowires

نویسندگان

  • Ujjal K. Gautam
  • Manashi Nath
چکیده

Selenium exhibits several useful properties such as high photoconductivity and catalytic activity and has commercial use in photocopiers and rectifiers. It also undergoes an interesting amorphous to t-phase transition. Nanorods of selenium of different diameters from 20 nm to several hundred nanometers have been prepared by laser ablation of selenium powder. Se nanowires have been prepared by refluxing selenous acid with N2H4. 2 Se nanorods are also prepared by the reduction of sodium selenate using cytochrome c3. The solution methods generally yield amorphous selenium as the initial product which then transforms to t-selenium. Xie et al. have recently reported the spontaneous transformation of monoclinic Se microballs to trigonal nanorods in ethanol solution. In this communication, we describe a simple and novel solution based synthesis wherein selenium powder is first reacted with NaBH4 to yield NaHSe 6 in solution which then transforms to amorphous selenium. In a typical room temperature reaction, 0.025 g (0.32 mmol) of selenium was mixed with 20 ml of deionized water in a three necked round bottom flask. 0.030 g (0.81 mmol) of NaBH4 was added to this mixture and the flask was immediately purged with nitrogen gas in order to create an inert atmosphere. The entire selenium dissolves in water within 60 minutes giving rise to a clear colourless solution. The colour of the solution starts turning red thereafter. We propose the following reaction scheme for the formation of Se:

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Chemical Vapor Deposition Synthesis of Novel Indium Oxide Nanostructures in Strongly Reducing Growth Ambient

The current study reports some interesting growth of novel In2O3 nanostructures using ambient-controlled chemical vapor deposition technique in the presence of a strongly reducing hydrazine ambient. The experiments are systematically carried out by keeping either of the carrier gas flow rate or the source temperature constant, and varying the other. For each of the depositions, the growth is st...

متن کامل

Optical Properties of ZnO Nanowires and Nanorods Synthesized by Two Step Oxidation Process

ZnO nanowires with a diameter of 70 nm and nanorods with a diameter in the range of 100-150 nm and two micrometer in length were grown on glass substrates by resistive evaporation method and applying a two step oxidation process at low temperatures, without using any catalyst, template or buffer layer. XRD pattern of these nanostructures indicated a good crystallinity property with wurtzite hex...

متن کامل

Synthesis and characterization of nanowires Hausmannite (Mn3O4) by solid-state thermal decomposition

In this study, we synthesis one-dimensional (1D) manganese(III) Schiff base coordination polymer [Mn(Brsalophen)(μ1,3-N3)]n by reaction of MnCl2·6H2O and tetradentate Schiff base ligand Brsalophen at the presence of NaN3 in methanol and characterized by elemental analyses (CHN) and FT-IR spectroscopy. It was used as a new precurs...

متن کامل

Selective synthesis of single-crystalline selenium nanobelts and nanowires in micellar solutions of nonionic surfactants.

Single-crystalline nanobelts and nanowires of trigonal selenium (t-Se) have been selectively synthesized in micellar solutions of nonionic surfactants. In particular, t-Se nanobelts about 30 nm in thickness were obtained in micellar solutions of poly(oxyethylene(20)) octadecyl ether (C18EO20), whereas t-Se nanowires were obtained in micellar solutions of poly(oxyethylene(10)) dodecyl ether (C12...

متن کامل

Synthesis and characterization of nanowires Hausmannite (Mn3O4) by solid-state thermal decomposition

In this study, we synthesis one-dimensional (1D) manganese(III) Schiff base coordination polymer [Mn(Brsalophen)(μ1,3-N3)]n by reaction of MnCl2·6H2O and tetradentate Schiff base ligand Brsalophen at the presence of NaN3 in methanol and characterized by elemental analyses (CHN) and FT-IR spectroscopy. It was used as a new precurs...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2003