Topic
Microheater
About: Microheater is a research topic. Over the lifetime, 814 publications have been published within this topic receiving 12478 citations.
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TL;DR: A purpose-built optoelectronics probe station capable of simultaneous optical-electrical excitation and simultaneous optical and electrical response measurement has been designed and constructed and the microheater-based approach was shown to be capable of successful thermally-induced cycling of large-area phase-change devices, making it attractive for practicable pixel fabrication in phase- change display applications.
Abstract: We present a viable pathway to the design and characterization of phase-change devices operating in a mixed-mode optical-electrical, or optoelectronic, manner. Such devices have potential applications ranging from novel displays to optically-gated switches to reconfigurable metamaterials-based devices. With this in mind, a purpose-built optoelectronics probe station capable of simultaneous optical-electrical excitation and simultaneous optical-electrical response measurement has been designed and constructed. Two prototype phase-change devices that might exploit simultaneous optical and electrical effects and/or require simultaneous optical and electrical characterisation, namely a mixed-mode cross-bar type structure and a microheater-based structure, have been designed, fabricated and characterized. The microheater-based approach was shown to be capable of successful thermally-induced cycling, between amorphous and crystalline states, of large-area phase-change devices, making it attractive for practicable pixel fabrication in phase-change display applications.
32 citations
TL;DR: In this article, an ultrafast laser (pulse duration < 1 ps) direct-write technique for rapid prototyping and manufacturing of embedded microheater structures on thermal sprayed NiCr (80 wt%/20 wt%) alloy coatings is presented.
Abstract: This work presents an ultrafast laser (pulse duration < 1 ps) direct-write technique for rapid prototyping and manufacturing of embedded microheater structures on thermal sprayed NiCr (80 wt%/20 wt%) alloy coatings By combining thermal spray, an additive material process, and ultrafast laser micromachining, a subtractive material process, this technique shows considerable potential in fabricating small scale embedded functional parts within thermal spray coatings Heater patterns designed to produce a uniform heat flux, a linear distributed heat flux, and a non-uniform heat flux that compensates for edge losses to produce a uniform temperature distribution have been fabricated and characterized A stable working temperature of up to 500 C measured in still air is observed, with fracture in the samples observed at higher operating temperatures A mechanical analysis based on bimorph beam bending is presented to account for the failure mechanism of the laser-machined thermal spray microheaters at high temperatures, and recommendations are made for improved materials and fabrication parameters for high-temperature operation
31 citations
TL;DR: In this paper, the gas sensing characteristics of porous tungsten disulfide (WS 2 ) aerogel are investigated, and the optimum sensing temperature is found to be about 250°C, when considering sensitivity, power consumption and response time.
30 citations
TL;DR: In this paper, a new type of gas sensor with very fast response and high sensitivity, which can detect the thermal conductivity change in a known ambient gas due to mixing with a gas of different thermal conductivities at elevated temperature, has been developed and demonstrated.
Abstract: A new type of gas sensor with very fast response and high sensitivity, which can detect the thermal conductivity change in a known ambient gas due to mixing with a gas of different thermal conductivity at elevated temperature, has ben developed and demonstrated. Since this new type of gas sensor can be easily heated above 400 °C because of its air-bridge microheater structure, the surface of its sensing area is refreshed every time by burning out adsorbed dust, oil, etc. This gas sensor can be used as an absolute-humidity sensor and a vacuum sensor.
30 citations
TL;DR: In this paper, a microscale surface thermometry using SU8/Rhodamine-B thin layer (SRTL) is proposed, where the ultra-thin SRTL is coated on the microheater which serves as a heat source for microscale heating.
Abstract: In the present paper, we propose a microscale surface thermometry using SU8/Rhodamine-B thin layer (SRTL). The ultra-thin SRTL is coated on the microheater which serves as a heat source for microscale heating. Surface-temperature distribution of the SRTL is measured with high spatial and temperature resolutions in a temperature range between 30 and 80 °C. Propagation of isotherms on the SRTL is visualized with a temperature resolution on the order of 0.1 °C. Spatial error in the measurement was analyzed, which depends on the size of interrogation window. The present concept of SU8 thin film in combination with Rhodamine-B signifies a considerable improvement in the indirect measurement method of surface temperature inside polymer-based microfluidic channels.
30 citations