Herramientas de medición inteligente para la reducción de energía de las habitaciones de los hoteles 4 estrellas de Tailandia

This research aimed to develop smart meter tools for energy reduction of the 4-star hotel guest rooms in Thailand. The Smart Meter Hotel (HSM) was designed to measure electricity usage and transmit data via the “Internet of Things” to the cloud network. The data was also sent to the hotel front office department to inform the actual amount and cost of electricity consumption from the guests. Thus, the applied tool provided electricity usage in real-time to reduce the electrical peak load and to manage the energy efficiency.Esta investigación tiene como objetivo desarrollar herramientas de medición inteligente para la reducción de energía de las habitaciones de los hoteles 4 estrellas en Tailandia. El Hotel Smart Meter (HSM) fue diseñado para medir el uso de electricidad y transmitir datos a través del "Internet de las cosas" a la red en la nube. Los datos también se enviaron al departamento de recepción del hotel para informar la cantidad real y el costo del consumo de electricidad de los huéspedes. Por lo tanto, la herramienta aplicada proporcionó el uso de electricidad en tiempo real para reducir el pico de la carga eléctrica y administrar la eficiencia energética

Selective metal deposition at graphene line defects by atomic layer deposition

One-dimensional defects in graphene have a strong influence on its physical properties, such as electrical charge transport and mechanical strength. With enhanced chemical reactivity, such defects may also allow us to selectively functionalize the material and systematically tune the properties of graphene. Here we demonstrate the selective deposition of metal at chemical vapour deposited graphene's line defects, notably grain boundaries, by atomic layer deposition. Atomic layer deposition allows us to deposit Pt predominantly on graphene's grain boundaries, folds and cracks due to the enhanced chemical reactivity of these line defects, which is directly confirmed by transmission electron microscopy imaging. The selective functionalization of graphene defect sites, together with the nanowire morphology of deposited Pt, yields a superior platform for sensing applications. Using Pt-graphene hybrid structures, we demonstrate high-performance hydrogen gas sensors at room temperature and show its advantages over other evaporative Pt deposition methods, in which Pt decorates the graphene surface non-selectively. ??? 2014 Macmillan Publishers Limited. All rights reservedclose4

Atomic layer deposition of platinum nanoparticles on titanium oxide and tungsten oxide using platinum(II) hexafluoroacetylacetonate and formalin as the reactants

Pt nanoparticles were grown on titanium oxide and tungsten oxide at 200 °C by Pt atomic layer deposition (ALD) using platinum(II) hexafluoroacetylacetonate [Pt(hfac)2] and formalin as the reactants. The Pt ALD surface chemistry and Pt nanoparticles were examined using in situ Fourier transform infrared (FTIR) vibrational spectroscopy and ex situ transmission electron microscopy (TEM). The FTIR spectra identified the surface species after the Pt(hfac)2 and formalin exposures on TiO2. An infrared feature at ~2100 cm–1 in the FTIR spectrum after Pt(hfac)2 and formalin exposures on TiO2 was consistent with CO on Pt, revealing that Pt(hfac)2 and formalin exposures led to the formation of Pt nanoparticles. The FTIR spectrum of Pt(hfac)2 on TiO2 was very similar to the FTIR spectrum of hexafluoroacetylacetone (hfacH) on TiO2. The FTIR spectra also revealed that hfacH blocked the adsorption of Pt(hfac)2 on TiO2. The coverage of the Pt nanoparticles could be reduced by preadsorbing hfacH on TiO2 prior to Pt(hfac)2 adsorption. Time-dependent FTIR spectra showed that the coverage of hfacH and its adsorption products were reduced versus time following hfacH exposure. Pt ALD on WOx at 200 °C led to the growth of Pt nanoparticles that were fairly similar to the Pt nanoparticles from Pt ALD on TiO2. The TEM images revealed that the size of the Pt nanoparticles on WOx could be adjusted by varying the number of Pt ALD cycles. Because of site-blocking by the hfac ligands, the Pt(hfac)2 and formalin reactants required many more ALD cycles for nucleation and growth compared with other Pt ALD surface chemistries