Universal Behavior of Highly Confined Heat Flow in Semiconductor Nanosystems: From Nanomeshes to Metalattices

McBennett, Brendan1,2,3; Beardo, Albert1,2,3; Nelson, Emma E.1,2,3; Abad, Begon1,2,3,4; Frazer, Travis D.1,2,3; Adak, Amitava1,2,3,5; Esashi, Yuka1,2,3; Li, Baowen6,7; Kapteyn, Henry C.1,2,3; Murnane, Margaret M.1,2,3; Knobloch, Joshua L.1,2,3

2023-03-01

10.1021/acs.nanolett.2c04419

NANO LETTERS   Impact Factor & Quartile

1530-6984

1530-6992

Nanostructuring on length scales corresponding to phonon mean free paths provides control over heat flow in semiconductors and makes it possible to engineer their thermal properties. However, the influence of boundaries limits the validity of bulk models, while first-principles calculations are too computationally expensive to model real devices. Here we use extreme ultraviolet beams to study phonon transport dynamics in a 3D nanostructured silicon metalattice with deep nanoscale feature size and observe dramatically reduced thermal conductivity relative to bulk. To explain this behavior, we develop a predictive theory wherein thermal conduction separates into a geometric perme-ability component and an intrinsic viscous contribution, arising from a new and universal effect of nanoscale confinement on phonon flow. Using experiments and atomistic simulations, we show that our theory applies to a general set of highly confined silicon nanosystems, from metalattices, nanomeshes, porous nanowires, to nanowire networks, of great interest for next-generation energy-efficient devices.

Nanoscale thermal transport 3D phononic crystal phonon hydrodynamics Extreme ultraviolet scatterometr y

SCI

English

Others

STROBE National Science Foundation Science & Technology Center[DMR-1548924]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000950334100001

AMER CHEMICAL SOC

MATERIALS SCIENCE

Web of Science

1.Univ Colorado, Dept Phys, JILA, Boulder, CO 80309 USA
2.Univ Colorado, STROBE NSF Sci & Technol Ctr, Boulder, CO 80309 USA
3.NIST, Boulder, CO 80309 USA
4.Univ Basel, Phys Dept, Klingelbergstr 82, CH-4056 Basel, Switzerland
5.IIT ISM Dhanbad, Dept Phys, Dhanbad 826004, Jharkhand, India
6.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Dept Phys, Shenzhen 518055, Peoples R China
7.Univ Colorado, Dept Mech Engn, Dept Phys, Boulder, CO 80309 USA

McBennett, Brendan,Beardo, Albert,Nelson, Emma E.,et al. Universal Behavior of Highly Confined Heat Flow in Semiconductor Nanosystems: From Nanomeshes to Metalattices[J]. NANO LETTERS,2023.

McBennett, Brendan.,Beardo, Albert.,Nelson, Emma E..,Abad, Begon.,Frazer, Travis D..,...&Knobloch, Joshua L..(2023).Universal Behavior of Highly Confined Heat Flow in Semiconductor Nanosystems: From Nanomeshes to Metalattices.NANO LETTERS.

McBennett, Brendan,et al."Universal Behavior of Highly Confined Heat Flow in Semiconductor Nanosystems: From Nanomeshes to Metalattices".NANO LETTERS (2023).