April 7 - 11, 2025
Seattle, Washington
Symposium Supporters
2025 MRS Spring Meeting & Exhibit
SF01.15.04

Multiscale Multiphysics Simulation of hBN Thermal and Radiative Properties

When and Where

Apr 11, 2025
10:30am - 10:45am
Summit, Level 3, Room 348

Presenter(s)

Co-Author(s)

Ziqi Guo1,Ioanna Katsamba1,Daniel Carne1,Dudong Feng1,Kellan Moss1,Emily Barber1,Ziqi Fang1,Andrea Felicelli1,Xiulin Ruan1

Purdue University1

Abstract

Ziqi Guo1,Ioanna Katsamba1,Daniel Carne1,Dudong Feng1,Kellan Moss1,Emily Barber1,Ziqi Fang1,Andrea Felicelli1,Xiulin Ruan1

Purdue University1
Radiative cooling paint has emerged as a promising passive cooling technology with broad applications in energy saving, thermal management, and combating climate change. A thin layer, lightweight, and ultra-white hexagonal boron nitride (h-BN) nanoporous paint has been developed recently, but the underlying atomic level physics of its radiative cooling performance is not well understood. In this work, a multiscale, multiphysics computational framework is employed to predict its radiative cooling performance from the corresponding atomic structures. Leveraging first-principles calculations to study the electronic transitions and phonon dynamics, we predict the refractive index and extinction coefficients across solar and mid-infrared spectra. Subsequently, Monte Carlo simulation is used to study the photon transport in particle-matrix nanocomposites, which agrees with the experimental results of the solar reflectance and the sky window emissivity. By comparing with BaSO4-based paint, we explain the origin of the high solar reflectance at a lower thickness and the relatively lower sky window emissivity of h-BN paint.

Symposium Organizers

Yee Kan Koh, National University of Singapore
Zhiting Tian, Cornell University
Tianli Feng, University of Utah
Hyejin Jang, Seoul National University

Session Chairs

Yee Kan Koh
Ella Pek

In this Session