Výsledky vyhledávání - "VALMOR ROBERTO MASTELARO"

Akademický článek

Al-doped ZnO Thin Films via Sputtering: Influence of Structural Defects on Ozone Gas Sensitivity

Autor: Douglas Henrique Sales, Ramon Resende Leite, Julio Cesar Camilo Albornoz Diaz, Amanda Akemy Komorizono, Maria Ines Basso Bernardi, Valmor Roberto Mastelaro, Elson Longo, Silvio Rainho Teixeira, Agda Eunice de Souza

Publikováno v: Materials Research, Vol 27, Iss suppl 2 (2024)

Nowadays, few studies have reported on the sensitivity of thin films of Al-doped ZnO to ozone. This gas can become harmful to health depending on its environmental concentration. This work presents the sensor response to ozone gas of pure ZnO and Al-

Externí odkaz: https://doaj.org/article/7dad251866364f2fb8ffbf647ae53dfe

Zobrazit plný text záznamu

Akademický článek

Partially reduced graphene oxide produced by glucose in alkaline conditions using probe sonication: the role of the base in reduction

Autor: Jean Valdir Uchôa Teixeira, Gabriel Junior Cavalcante Pimentel, Adriana Alencar Santos, Leonardo Francisco Gonçalves Dias, Valmor Roberto Mastelaro, Paulo Noronha Lisboa-Filho

Publikováno v: Journal of Materials Research and Technology, Vol 26, Iss , Pp 1785-1797 (2023)

The use of mild reagents in the synthesis of reduced graphene oxide (RGO) is an advantageous method to produce materials partially reduced without the use of hazardous chemicals, such as the hydrazine route, which is a standard method to promote the

Externí odkaz: https://doaj.org/article/59851c46498647809721bc97488c1b2b

Zobrazit plný text záznamu

Akademický článek

X-ray Absorption Fine Structure (XAFS) Studies of Oxide Glasses—A 45-Year Overview

Autor: Valmor Roberto Mastelaro, Edgar Dutra Zanotto

Publikováno v: Materials, Vol 11, Iss 2, p 204 (2018)

X-ray Absorption Fine Structure (XAFS) spectroscopy has been widely used to characterize the short-range order of glassy materials since the theoretical basis was established 45 years ago. Soon after the technique became accessible, mainly due to the

Externí odkaz: https://doaj.org/article/904459ba13ce42dd8f0cc601d183ae4a

Zobrazit plný text záznamu

Plný text ve formátu HTML

Akademický článek

Deposition Rate Influence in O3 Sensing Response of Sputtered ZnO Thin Films

Autor: Nathaly Colmenares, Wagner Correr, Valmor Roberto Mastelaro

Publikováno v: Proceedings, Vol 1, Iss 4, p 429 (2017)

The study of semiconductor materials applied as chemical gas sensing devices is currently focused on the production of new sensing materials with the best possible properties in terms of detection limits, selectivity, work temperature and response ti

Externí odkaz: https://doaj.org/article/adbe2cdb78214c76ac9c19a502e5dcb3

Zobrazit plný text záznamu

Akademický článek

Construção de um dilatômetro e determinação do coeficiente de dilatação térmica linear

Autor: Daniel Cosmo Pizetta, Valmor Roberto Mastelaro

Publikováno v: Revista Brasileira de Ensino de Física, Vol 36, Iss 1

O estudo da dilatação térmica linear dos sólidos é de grande importância para diferentes áreas da física e engenharias como, por exemplo, a construção civil onde a dilatação pode causar danos estruturais irreversíveis. Por outro lado, di

Externí odkaz: https://doaj.org/article/1bd2d1bea229482c9bf959c1ce0a2fd5

Zobrazit plný text záznamu

Akademický článek

Uma avaliação experimental do tubo de ondas sonoras estacionárias

Autor: Daniel Cosmo Pizetta, Adilson Barros Wanderley, Valmor Roberto Mastelaro, Fernando Fernandes Paiva

Publikováno v: Revista Brasileira de Ensino de Física, Vol 39, Iss 3

A maioria dos aparatos experimentais para o estudo de ondas de som estacionárias é composto por um tubo onde há um êmbolo com um microfone para captação do sinal e um alto-falante como fonte excitadora. Este mesmo êmbolo define o tamanho útil

Externí odkaz: https://doaj.org/article/dc9c703de4724ccfa9582dfc4d6d830b

Zobrazit plný text záznamu

Vyhledávací nástroje:

Upřesnit hledání