12 research outputs found
Synergistic Improvement in the Thermal Conductivity of Hybrid Boron Nitride Nanotube/Nanosheet Epoxy Composites
No full textEpoxy composites with excellent thermal properties are highly promising for thermal management applications in modern electronic devices. In this work, we report the enhancement of thermal conductivity of two different epoxy resins, Araldite\u27s LY 564 (epoxy 1) and LY 5052 (epoxy 2) by incorporating multi-walled boron nitride nanotubes (BNNT) and boron nitride nanosheets (BNNS) hybrids as fillers. The highest thermal conductivity was observed at a loading of 1 wt% / 30 wt% of BNNT/BNNS hybrid, resulting in values of 2.6 Wm-1K-1 and 3.4 Wm-1K-1 respectively for each matrix, an increase of 10 to 17 times compared to the original epoxy. This improvement is attributed to the formation of a three-dimensional heat flow path formed through the intercalation of the nanotubes between the BNNSs. The thermal conductivity of the epoxy 1 and epoxy 2 composites improved by 940% and 1500% respectively, making them suitable as thermal interface materials in electronic packages requiring electrical resistivity
Inherent electrochemistry and charge transfer properties of few-layered two-dimensional Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>MXene
No full textFew-layered Ti3C2TxMXene undergoes more electro-oxidation in positive potential window and aqueous medium compared to a multi-layered and bulk 3D stack of Ti3C2Txlayers.</p
Inherent Electrochemistry and Charge Transfer Properties of Few-Layer Two Dimensional Ti3C2Tx MXene
No full textWe report the effect of Ti3C2Tx MXene flake thickness on its inherent electrochemistry and heterogeneous charge transfer characteristics. It is shown that the Ti3C2Tx undergoes irreversible oxidation in the positive potential window, which strongly depends on the flake thickness and pH of the electrolyte. Few-layer Ti3C2Tx exhibits faster electron transfer kinetics (k0=0.09533 cm/s) with Fe(CN)64−/3− redox mediator compared to multi-layer Ti3C2Tx (k0= 0.00503 cm/s). In addition, few-layer free standing Ti3C2Tx film electrode remains intact after enduring irreversible oxidation.Research reported in this publication is supported by funding from King Abdullah University of Science and Technology (KAUST), Saudi Arabia. Authors would like to thank Dr. Narendra Kurra for helpful discussions. Dr. P. Nayak would like to thank DST (Government of India) for the Inspire Faculty Award (Grant No. 04/2015/002660)
Synergistic Improvement in the Thermal Conductivity of Hybrid Boron Nitride Nanotube/Nanosheet Epoxy Composites
No full textEpoxy composites with excellent thermal properties are highly promising for thermal management applications in modern electronic devices. In this work, we report the enhancement of the thermal conductivity of two different nanocomposites, using epoxy resins LY564 (epoxy 1) and LY5052 (epoxy 2), by incorporating multiwalled boron nitride nanotubes (BNNT) and boron nitride nanosheets (BNNS) as fillers. The synergistic interaction between the 1D BNNT and 2D BNNS allows for improved thermal conductivity via several different mechanisms. The highest thermal conductivity was measured at a loading of 1/30 wt % of BNNT/BNNS, resulting in values of 2.6 and 3.4 Wm -1 K -1, respectively, for each epoxy matrix. This improvement is attributed to the formation of a three-dimensional heat flow path formed through intercalation of the nanotubes between the BNNS. The thermal conductivity of the epoxy 1 and 2 nanocomposites improved by 940 and 1500%, respectively, making them suitable as thermal interface materials in electronic applications requiring electrical resistivity.</p
Influence of In doping on the thermoelectric properties of AgSbTe2 compound with enhanced figure of merit
No full text[[sponsorship]]物理研究所[[note]]已出版;有審查制度;具代表性[[note]]http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Drexel&SrcApp=hagerty_opac&KeyRecord=0959-9428&DestApp=JCR&RQ=IF_CAT_BOXPLO
Engineering Nanostructural Routes for Enhancing Thermoelectric Performance: Bulk to Nanoscale
No full textInfluence of nanoscale Ag2Te precipitates on the thermoelectric properties of the Sn doped P-type AgSbTe2 compound
No full textWe report a maximal figure of merit (ZT) value of 1.1 at 600 K was obtained for the sample of which x = 0.03, representing an enhancement greater than 20% compared with a pristine AgSbTe2 sample. This favorable thermoelectric performance originated from the optimal Sn2+ substitution for Sb3+ in AgSbTe2, which not only increased electrical conductivity but also led to a substantial reduction in thermal conductivity that was likely caused by an enhanced phonon-scattering mechanism through the combined effects of lattice defects and the presence of Ag2Te nanoprecipitates dispersed in the matrix
Influence of In doping on the thermoelectric properties of an AgSbTe2 compound with enhanced figure of merit
No full text[[sponsorship]]應用科學研究中心[[note]]已出版;有審查制
Solution-processable bismuth iodide nanosheets as hole transport layers for organic solar cells
No full text[[sponsorship]]應用科學研究中心[[note]]已出版;[SCI];有審查制度;具代表性[[note]]http://gateway.isiknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Drexel&SrcApp=hagerty_opac&KeyRecord=0927-0248&DestApp=JCR&RQ=IF_CAT_BOXPLO
