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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07 Apr 2013
TL;DR: Results show that up to 18% of power reduction can be achieved with the proposed CNTs-based heat-sink configuration.
Abstract: A new carbon-nanotube-based (CNTs) heat sink is developed. Due to their high thermal conductivity and aspect ratio, CNT boundles are used as fins of the heat sink. Fins as high as 300 μm with an aspect ratio of 30 are fabricated. For the thermal characterization of the heat sink, a microheater is integrated with the heat-sink and it is also used as temperature sensor. It is realized by using the low doped silicon bulk as electrical resistor. The sensor shows a sensitivity of 0.6 Ω/K. A thermal characterization is performed to evaluate the heat dissipated by the CNT-based heat-sink. Results show that up to 18% of power reduction can be achieved with the proposed CNTs-based heat-sink configuration.
4 citations
TL;DR: In this article , a novel manufacturing process for flexible microheaters with designed heating patterns is presented, which combines direct laser writing, 3D printing, and selective electrodeposition to control the deposition of graphene and copper on a polyimide film.
4 citations
10 Dec 2019
TL;DR: In this paper, the authors proposed serpentine-shaped and spiral-shaped microheaters for a dynamic-flow microbioreactor, which were then fabricated by maskless photolithography using visible light generated by a commercial digital light projector (DLP) followed by wet etching.
Abstract: Advances in microfabrication have led to the development of microbioreactor including microheater as one of important components for microbioreactor. Microheater should be fabricated based on specific requirement of microbioreactor including shape, size, target working temperature, and heating rate profile, where they would determine the heat distribution to the microbioreactor. Here, we propose serpentine-shaped and spiral-shaped microheaters for a dynamic-flow microbioreactor. Computer models were generated and characterized by finite element analysis (FEA) to simulate the heating performance. Microheaters were then fabricated by maskless photolithography using visible light generated by a commercial digital light projector (DLP) followed by wet etching. Geometrical features of fabricated microheaters were then measured to characterize the design transfer. FEA result shows that given same amount of input electrical power and observation time; both microheaters have different heat distribution profiles which could affect the heating control scheme. Geometrical measurement on certain segments shows that the current fabrication technique can transfer the design with dimensional error percentage of 0.5 to 39 % without significant change in the geometrical shape.Advances in microfabrication have led to the development of microbioreactor including microheater as one of important components for microbioreactor. Microheater should be fabricated based on specific requirement of microbioreactor including shape, size, target working temperature, and heating rate profile, where they would determine the heat distribution to the microbioreactor. Here, we propose serpentine-shaped and spiral-shaped microheaters for a dynamic-flow microbioreactor. Computer models were generated and characterized by finite element analysis (FEA) to simulate the heating performance. Microheaters were then fabricated by maskless photolithography using visible light generated by a commercial digital light projector (DLP) followed by wet etching. Geometrical features of fabricated microheaters were then measured to characterize the design transfer. FEA result shows that given same amount of input electrical power and observation time; both microheaters have different heat distribution profiles w...
4 citations
4 citations
TL;DR: In this paper , the heater-integrated fluidic resonators (HFRs) are introduced to enable fast, quantitative, alignment-free, and wide-range temperature modulation and simultaneously offer resistive thermometry and resonant densitometry.
Abstract: Micro/nanochannel resonators have been used to measure cells, suspended nanoparticles, or liquids, primarily at or near room temperature while their high temperature operation can offer promising applications such as calorimetric measurements and thermogravimetric analysis. To date, global electrothermal or local photothermal heating mechanisms have been attempted for channel resonators, but both approaches are intrinsically limited by a narrow temperature modulation range, slow heating/cooling, less quantitative heating, or time-consuming optical alignment. Here, we introduce heater-integrated fluidic resonators (HFRs) that enable fast, quantitative, alignment-free, and wide-range temperature modulation and simultaneously offer resistive thermometry and resonant densitometry. HFRs with or without a dispensing nozzle are fabricated, thoroughly characterized, and used for high throughput thermophysical properties measurements, microchannel boiling studies, and atomized spray dispensing. The HFR, without a doubt, opens a new avenue for nanoscale thermal analysis and processing and further encourages the integration of additional functions into channel resonators.
4 citations