English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The energy transferred via thermal radiation between two surfaces separatedby nanometers distances (near-field) can be much larger than the blackbodylimit. However, realizing a reconfigurable platform that utilizes this energyexchange mechanism to generate electricity in industrial and space applicationson-demand, remains a challenge. The challenge lies in designing a platform thatcan separate two surfaces by a small and tunable gap while simultaneouslymaintaining a large temperature differential. Here, we present a fullyintegrated, reconfigurable and scalable platform operating in near-field regimethat performs controlled heat extraction and energy recycling. Our platformrelies on an integrated nano-electromechanical system (NEMS) that enablesprecise positioning of a large area thermal emitter within nanometers distancesfrom a room-temperature germanium photodetector to form a thermo-photovoltaic(TPV) cell. We show over an order of magnitude higher power generation$\mathrm{P_{gen} \sim 1.25 \, \mu W \cdot cm^{-2}}$ from our TPV cell by tuningthe gap between a hot emitter ($\mathrm{T_E \sim 880 \, K}$) and the coldphotodetector ($\mathrm{T_D \sim 300 \, K}$) from $\mathrm{\sim 500 \, nm}$ to$\mathrm{\sim 100 \, nm}$. The significant enhancement in $\mathrm{P_{gen}}$ atsuch small distances is a clear indication of near-field heat transfer effect.Our electrostatically controlled NEMS switch consumes negligible tuning power($\mathrm{P_{gen}/P_{NEMS} \sim 10^4}$) and relies on conventionalsilicon-based process technologies.

Integrated near-field thermo-photovoltaics for on-demand heat recycling