Thermal studies of nanoporous thin films with added periodic nanopores—a new approach to evaluate the importance of phononic effects

Heat Transport Control and Thermal Characterization of Low-Dimensional Materials: A Review

“…Such dimensions can tailor the dispersion relations of phonons in the GHz range with a poor contribution to the thermal properties at room temperature [ 33 ]. Lee et al demonstrate that phonon coherence is negligible in the thermal transport of silicon nanomeshes with periodicities ≥100 nm and T > 14 K. Xiao et al also found a negligible contribution of wave effects in the total thermal resistance of Si thin film with increased rows of nanopores with temperatures ranging from 85–300 K [ 44 ].…”

Nanoporous Metallic Films

“…The variables in this phenomenon are metal since each metal releases a unique amount of energy which acts as the fingerprint of that metal and frequency of electromagnetic radiations. Therefore, by changing these variables a nanoporous structure can be used for a huge number of applications like sensors [31], medical imaging, diagnostics [32] etc. Based on the movement of surface plasmons (SPs), the optical characterization techniques have been classified into surface plasmon polaritons (SPPs) and localized SPRs (LSPRs).…”

“…With the help of excitation from grating or prism couplers, SPPs are known to propagate for tens or hundreds of micrometers [33]. As the name suggests the second one, localized SPRs (LSPRs) are non-propagating type and since the resonance in a confined space has been associated with a strong electromagnetic field, LSPRs contribute to several significant phenomena like surface-enhanced Raman spectroscopy [34], phononic effects [31]. This strong electromagnetic field becomes more prominent when the nanostructures have sharp features.…”

Engineering thermal transport within Si thin films: The impact of nanoslot alignment and ion implantation

“…Such ion implantation can introduce point defects such as silicon vacancies and interstitials ( Lim et al., 2016 ). For ion irradiation with sufficient energy and/or beyond a threshold dose, amorphization can also be observed to lower the k L ( Scott et al., 2020 ; Tamura et al., 1986 ; Xiao et al., 2020 ; Zhao et al., 2017 ). For the doping purpose, an one order of magnitude reduction in the k was reported for 100-nm diameter ZnO nanowires with implanted gallium ions (Ga + ), with a simultaneous one order of magnitude increase in the σ ( Xia et al., 2014 ).…”