3 research outputs found
Nanoscale Electromechanics To Measure Thermal Conductivity, Expansion, and Interfacial Losses
We study the effect of localized
Joule heating on the mechanical properties of doubly clamped nanowires
under tensile stress. Local heating results in systematic variation
of the resonant frequency; these frequency changes result from thermal
stresses that depend on temperature dependent thermal conductivity
and expansion coefficient. The change in sign of the linear expansion
coefficient of InAs is reflected in the resonant response of the system
near a bath temperature of 20 K. Using finite element simulations
to model the experimentally observed frequency shifts, we show that
the thermal conductivity of a nanowire can be approximated in the
10–60 K temperature range by the empirical form κ = <i>b</i>T W/mK, where the value of <i>b</i> for a nanowire
was found to be <i>b</i> = 0.035 W/mK<sup>2</sup>, significantly
lower than bulk values. Also, local heating allows us to independently
vary the temperature of the nanowire relative to the clamping points
pinned to the bath temperature. We suggest a loss mechanism (dissipation
∼10<sup>–4</sup>–10<sup>–5</sup>) originating
from the interfacial clamping losses between the metal and the semiconductor
nanostructure
Additional file 4: of Anticoagulated patient’s perception of their illness, their beliefs about the anticoagulant therapy prescribed and the relationship with adherence: impact of novel oral anticoagulant therapy – study protocol for The Switching Study: a prospective cohort study
Questionnaire packs administered to patients prescribed rivaroxaban*. (PDF 277 kb
Additional file 3: of Anticoagulated patient’s perception of their illness, their beliefs about the anticoagulant therapy prescribed and the relationship with adherence: impact of novel oral anticoagulant therapy – study protocol for The Switching Study: a prospective cohort study
Questionnaire packs administered to patients prescribed dabigatran. (PDF 276 kb