Results 61 to 70 of about 27,867 (246)

Tunable Charge and Spin Seebeck Effects in Magnetic Molecular Junctions

, 2012
We study the charge and spin Seebeck effects in a spin-1 molecular junction as a function of temperature (T), applied magnetic field (H), and magnetic anisotropy (D) using Wilson's numerical renormalization group. A hard-axis magnetic anisotropy produces
C. A. Balseiro, D. Pines, Gonzalo Usaj, N. Ashcroft, Pablo S. Cornaglia   +4 more
core   +1 more source

Selenium‐Incorporated Polymerized Nonfullerene Acceptors/SWCNT Composites with Polymer‐Assisted n‐Doping for High‐Performance Organic Thermoelectrics

Advanced Functional Materials, EarlyView.
Selenium‐incorporated polymerized nonfullerene acceptor PCB2Se forms a strong supramolecular complex with SWCNTs, enabling a record‐high zT of 0.29. Sequential N‐DMBI doping, mediated through a polymer‐assisted electron‐transfer pathway, successfully converts the PCB2Se/SWCNT composite into an efficient n‐type material with an impressive power factor ...
Chi‐Chun Tseng, Che‐An Chou, Chi Chang, Li‐Lun Yeh, Chien‐Yi Ku, Jhih‐Min Lin, Shih‐Huang Tung, Cheng‐Liang Liu, Yen‐Ju Cheng   +8 more
wiley   +1 more source

Thermal spin injection and interface insensitivity in permalloy/aluminum metallic non-local spin valves

, 2016
We present measurements of thermal and electrical spin injection in nanoscale metallic non-local spin valve (NLSV) structures. Informed by measurements of the Seebeck coefficient and thermal conductivity of representative films made using a micromachined
Hojem, Alex, Wesenberg, Devin, Zink, Barry L.   +2 more
core   +1 more source

Unlocking Multi‐Valley Energy Pockets and Interface‐Induced Phonon Filtering in InSb Thermoelectrics by Reaction‐Driven Interface Engineering

Advanced Functional Materials, EarlyView.
InSb, a narrow‐bandgap semiconductor with high carrier mobility, is promising for thermoelectric energy conversion but suffers from high lattice thermal conductivity and strong bipolar conduction. Here, in situ interface engineering using Co2O3 nanoprecursors forms hierarchical CoSbx/In2O3/CoSb3 heterostructures that enhance phonon scattering and ...
Jiwu Xin, Xiao Yang, Xiao‐Lei Shi, Chengyun Xu, Xi Ling, Pengyu Zhang, Jinfeng Dong, Yong Du, Haisheng Chen, Ting Zhang, Zhi‐Gang Chen   +10 more
wiley   +1 more source

Fabrication and thermoelectric properties of Ca-Co-O ceramics with negative Seebeck coefficient

Results in Physics, 2018
Ca-Co-O ceramics is typically p-type thermoelectric materials and possesses positive Seebeck coefficient. In this work, n-type Ca-Co-O ceramics with negative Seebeck coefficients were fabricated by sintering and annealing in a reducing atmosphere.
Chunlin Gong, Zongmo Shi, Yi Zhang, Yongsheng Chen, Jiaxin Hu, Jianjun Gou, Mengjie Qin, Feng Gao   +7 more
doaj   +1 more source

Enhanced thermoelectric properties of Ce–doped Bi2Sr2Co2Oy misfit–layer oxides

Journal of Materials Research and Technology, 2022
To improve the thermoelectric properties of Ce–doped Bi2Sr2Co2Oy, the structural and thermoelectric properties of Bi2–xCexSr2Co2Oy (0 ≤ x ≤ 0.15) prepared by both conventional sintering (CS) and spark plasma sintering (SPS) are investigated.
H.Y. Hong, S.Y. Gwon, S.O. Won, K. Park
doaj   +1 more source

How the Carrier Mobility and Seebeck Coefficient of Doped Semiconducting Polymers Are Controlled by Counterion Interactions and Mesoscale Order

Advanced Functional Materials, EarlyView.
Conventional doping of P3HT with F4TCNQ results in poor charge transport. However, when F4TCNQ is exchanged with LiTFSI, the transport characteristics are greatly enhanced. We find the increase in charge transport is directly related to an increase in the mesoscale ordering of P3HT, resulting in longer and better‐connected transport pathways.
Quynh M. Duong, Diego Garcia Vidales, Xinyu Liu, Charlene Z. Salamat, Austin Ready, Hashim Al Khunaizi, Mei Matsumoto, Alexander M. Spokoyny, Sarah H. Tolbert, Benjamin J. Schwartz   +9 more
wiley   +1 more source

Non-dissipative Thermal Transport and Magnetothermal Effect for the Spin-1/2 Heisenberg Chain

, 2004
Anomalous magnetothermal effects are discussed in the spin-1/2 Heisenberg chain. The energy current is related to one of the non-trivial conserved quantities underlying integrability and therefore both the diagonal and off diagonal dynamical correlations
Alvarez J. V., Alvarez J. V., Fujimoto S., Heidrich-Meisner F., Heidrich-Meisner F., Hess C., Klümper A., Klümper A., Kudo K., Louis K., Mahan G. D., Narozhny B. N., Orignac E., Sakai K., Sologubenko A. V., Takigawa M., Zotos X., Zotos X.   +17 more
core   +1 more source

Smart Face Masks as Wearable Respiratory Sensors: A Review of Sensor Technologies, Materials, and Future Directions

Advanced Healthcare Materials, EarlyView.
This review highlights recent advances in smart face masks that actively monitor breathing. By integrating humidity, gas, temperature, pressure, strain, and triboelectric sensors, these masks track key respiratory parameters in real time. The article summarizes sensor mechanisms, compares performance across studies, and discusses challenges and future ...
Negin Faramarzi, Naseeh Backer Kannanthodi, Alice Nicole Casling, Babar Ali, Samira Lakouraj Mansouri, Alessandro Giuseppe D'aloia, Hossein Cheraghi Bidsorkhi, Maria Sabrina Sarto   +7 more
wiley   +1 more source

Enhancement of the Seebeck effect in bilayer armchair graphene nanoribbons by tuning the electric fields

, 2017
The Seebeck coefficient in single and bilayer graphene sheets has been observed to be modest due to the gapless characteristic of these structures. In this work, we demonstrate that this coefficient is significantly high in quasi-1D structures of bilayer
Nguyen, Thi-Kim-Quyen, Nguyen, Thi-My-The, Nguyen, Van-Cuong, Tran, Van-Truong, Vu, Thanh-Tra   +4 more
core   +1 more source