nanostructured oxides on porous silicon microhotplates for nh3 sensing

... WO 3 :Cr, for these operating conditions. Ó 2008 Elsevier B.V. All rights reserved. Keywords: Gas sensors; Porous silicon; Micro-hotplates; Nanostructured metal oxides; NH 3 sensing 1. Introduction The ... Nanostructured oxides on porous silicon microhotplates for NH 3 sensing R. Triantafyllopoulou a, * , X. Illa b , O. Casals b , S. ... semiconductive metal oxides...

Ngày tải lên: 20/03/2014, 13:05

... thickness were used for experiments. The protection material was only SiO 2 layer formed on two sides of silicon wafer by wet thermal oxidation. In the oxidation condition of 1100 0 C, wet ... condition for etching silicon in TMAH solution with controlled etch rate and low surface roughness is the purpose of this study. The investigation on the influence of temperature, agi...

Ngày tải lên: 13/02/2014, 04:20

... a requisite condition for the formation of highly luminescent, thick and stable porous silicon films. Porous silicon using ethanol-based electrolyte is superior to porous silicon formed using H 2 O 2 - based ... [12]. Recently, we have demonstrated by means of high-resolution XRD studies that texturization of silicon surface is an effective method for the formation of stable...

Ngày tải lên: 16/03/2014, 15:19

... reserved. Keywords: Macroporous silicon; Electrical sensors; Organic solvent detection; Chemical sensor 1. Introduction Porous silicon( PSi) isproduced by electrochemicaldisso- lution of crystalline silicon in a ... electrical sensor platform containing a porous silicon (PSi) layer on a crystalline silicon substrate has been developed in which the electrical contacts are made ex...

Ngày tải lên: 16/03/2014, 15:23

Ngày tải lên: 05/10/2012, 08:23

... study, clarification of the type of questions and a request for an informed consent. Filled out question- naires were collected on the next day. Follow-up visits were made for the participants ... the respondents on the next day or follow up visits as many medical professionals have duties in more than one health facility. Medical profes- sionals with stronger views on the need to r...

Ngày tải lên: 25/10/2012, 10:06

... obtain the desired information in an efficient and direct manner. Currently, there is a lot of information available in structured format on the web. For example, an apartment on real estate website ... position lists of constraints, we have to decide which combination of positions from them into result list. For example, in camera product domain, the position list of ZOOM constra...

Ngày tải lên: 23/11/2012, 15:04

... developed for the MERS configuration [8]. IGBT development concerns the trade-offs shown in Fig. 5. The conditions can be changed if the IGBT is applied to new circuit configurations. For the MERS configuration, ... MERS configuration can contribute to energy savings and promote renewable energy conversion. B. Induction heating 1) Controllable frequency induction heating: Induction heating is...

Ngày tải lên: 15/10/2013, 16:10

... organizations can use the con- cept of a single focus to create alignment and contribute to high performance. Many types of organizations such as London Guarantee Insurance Company, Ontario Northland, ... Buying my last boat was a consumer’s application of compari- son shopping for economic value-added. I know boats, having owned a boat of some type for over thirty consecutive years. I k...

Ngày tải lên: 24/10/2013, 09:20