Thermomechanical and Thermal Contact Characteristics of Bismuth Telluride Films Electrodeposited on Carbon Nanotube Arrays

Mishra, Himanshu; Cola, Baratunde A.; Rawat, Vijay; Amama, Placidus B.; Biswas, Kalapi G.; Xu, Xianfan; Fisher, Timothy S.; Sands, Timothy D.

doi:10.1002/adma.200803705

Cited by 17 publications

(11 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to reduce the electrical contact resistances, carbon nanotube interfaces are being considered at the semiconductorconductor junction [12,13]. Using carbon nanotubes, reduction of the electrical contact resistance of Si-Bi 2 Te 3 by an order or magnitude was observed (2.5×10 -5 Ωm 2 to 2×10 -6 Ωm 2 ).…”

Section: Introductionmentioning

confidence: 99%

Determination of Electrical Contact Resistivity in Thermoelectric Modules (TEMs) From Module-Level Measurements

Annapragada¹,

Salamon²,

Kolodner³

et al. 2012

IEEE Trans. Compon., Packag. Manufact. Technol.

View full text Add to dashboard Cite

An experimental apparatus was developed to characterize the performance of a thermoelectric module (TEM) and heat sink assembly when the TEM was operated in refrigeration mode. A numerical model was developed to simulate the experiments.Bulk and interfacial Ohmic heating, the Peltier effect, Thomson effect and temperature-dependent bulk material properties, i.e., Seebeck coefficient and electrical conductivity were considered. A novel, self-consistent characterization methodology was developed to obtain the electrical contact resistivity at the interconnects in a TEM from the numerical simulations and the experiments. The electrical contact resistivity of the module tested was determined to be approximately 1.0×10 -9 Ωm 2 . The predictions are consistent with electrical contact resistivity obtained based on the performance specifications (ΔT max ) of the TEM.

show abstract

Section: Introductionmentioning

confidence: 99%

Determination of Electrical Contact Resistivity in Thermoelectric Modules (TEMs) From Module-Level Measurements

Annapragada¹,

Salamon²,

Kolodner³

et al. 2012

IEEE Trans. Compon., Packag. Manufact. Technol.

View full text Add to dashboard Cite

show abstract

“…To a certain extent, the space application is simpler since the device operates at a nearly constant temperature difference all the time. Thermal interface materials based on carbon nanotubes have been under development by some groups for such applications 296,297 .…”

Section: System Challengesmentioning

confidence: 99%

Comprehensive Review of Heat Transfer in Thermoelectric Materials and Devices

Tian¹,

Lee

Chen

2014

Annual Rev Heat Transfer

View full text Add to dashboard Cite

Solid-state thermoelectric devices are currently used in applications ranging from thermocouple sensors to power generators in satellites, to portable air-conditioners and refrigerators. With the ever-rising demand throughout the world for energy consumption and CO 2 reduction, thermoelectric energy conversion has been receiving intensified attention as a potential candidate for waste-heat harvesting as well as for power generation from renewable sources. Efficient thermoelectric energy conversion critically depends on the performance of thermoelectric materials and devices. In this review, we discuss heat transfer in thermoelectric materials and devices, especially phonon engineering to reduce the lattice thermal conductivity of thermoelectric materials, which requires a fundamental understanding of nanoscale heat conduction physics.

show abstract

“…Even though silica-GEMs prevented water intrusion, measurable fluxes were not observed. This was due to the fact that the thermal conductivity of silicon (k = 149 W-m -1 K -1 ) 41 is orders of magnitude higher than that of typical DCMD membranes (i.e., k < 1 W-m It may be possible to reduce the thermal conductivity of silicon through nanostructuring 42 (for instance, to enhance its thermoelectric properties 43 ), but these avenues were not explored. Instead, the design principles from silica-GEMs were translated to polymethylmethacrylate (PMMA) sheets (θ o ≈ 70° for water, k = 0.19 W-m -1 -K -1 ) 40 to create PMMA-GEMs 37 .…”

Section: Direct Contact Membrane Distillation With Gemsmentioning

confidence: 99%

Proof-of-Concept for Gas-Entrapping Membranes Derived from Water-Loving SiO<sub>2</sub>/Si/SiO<sub>2</sub> Wafers for Green Desalination

Das

Arunachalam

Ahmad

et al. 2020

JoVE

Self Cite

View full text Add to dashboard Cite

Desalination through direct contact membrane distillation (DCMD) exploits water-repellent membranes to robustly separate counterflowing streams of hot and salty seawater from cold and pure water, thus allowing only pure water vapor to pass through. To achieve this feat, commercial DCMD membranes are derived from or coated with water-repellent perfluorocarbons such as polytetrafluoroethylene (PTFE) and polyvinylidene difluoride (PVDF). However, the use of perfluorocarbons is limiting due to their high cost, non-biodegradability, and vulnerability to harsh operational conditions. Unveiled here is a new class of membranes referred to as gas-entrapping membranes (GEMs) that can robustly entrap air upon immersion in water. GEMs achieve this function by their microstructure rather than their chemical make-up. This work demonstrates a proof-ofconcept for GEMs using intrinsically wetting SiO 2 /Si/SiO 2 wafers as the model system; the contact angle of water on SiO 2 is θ o ≈ 40°. Silica-GEMs had 300 μm-long cylindrical pores whose diameters at the (2 μm-long) inlet and outlet regions were significantly smaller; this geometrically discontinuous structure, with 90° turns at the inlets and outlets, is known as the "reentrant microtexture". The microfabrication protocol for silica-GEMs entails designing, photolithography, chrome sputtering, and isotropic and anisotropic etching. Despite the water loving nature of silica, water does not intrude silica-GEMs on submersion. In fact, they robustly entrap air underwater and keep it intact even after six weeks (>10 6 seconds).On the other hand, silica membranes with simple cylindrical pores spontaneously imbibe water (< 1 s). These findings highlight the potential of the GEMs architecture for separation processes. While the choice of SiO 2 /Si/SiO 2 wafers for GEMs is limited to demonstrating the proof-of-concept, it is expected that the protocols and concepts presented here will advance the rational design of scalable GEMs using inexpensive common materials for desalination and beyond.

show abstract

Thermomechanical and Thermal Contact Characteristics of Bismuth Telluride Films Electrodeposited on Carbon Nanotube Arrays

Cited by 17 publications

References 13 publications

Determination of Electrical Contact Resistivity in Thermoelectric Modules (TEMs) From Module-Level Measurements

Determination of Electrical Contact Resistivity in Thermoelectric Modules (TEMs) From Module-Level Measurements

Comprehensive Review of Heat Transfer in Thermoelectric Materials and Devices

Proof-of-Concept for Gas-Entrapping Membranes Derived from Water-Loving SiO<sub>2</sub>/Si/SiO<sub>2</sub> Wafers for Green Desalination

Contact Info

Product

Resources

About