Hur, Kahyun Hennig, Richard G. Wiesner, Ulrich 2024-01-20T00:30:43Z 2024-01-20T00:30:43Z 2021-09-03 2017-10-12 1932-7447 https://pubs.kist.re.kr/handle/201004/122174 Controlling the phononic properties of materials provides opportunities for better thermal insulation, reduction of sound noise, and conversion of wasted heat into electricity. Phononic crystals are periodically structured media composed of two or more dissimilar materials offering a unique pathway to control the transmission of phonons, responsible for sound and heat transport. In particular, phononic crystals with cubic network structure possessing complete phononic bandgaps are highly desirable for energy applications but have not been thoroughly investigated, hampering progress in this field. Here we computationally obtained phononic band structures of 16 cubic network structures that could be made by fabrication techniques including block copolymer self-assembly and identified six structures that exhibit complete phononic bandgaps. The champion phononic bandgap structure is the so-called I-WP structure with a bandgap width of 0.41. On the basis of simulation results, design rules to tailor network structures for larger phononic bandgaps are elucidated. We expect that our results will provide guidance to develop novel materials for sonic and thermal devices. English American Chemical Society MINIMAL-SURFACES BLOCK-COPOLYMERS ELASTIC-WAVES Exploring Periodic Bicontinuous Cubic Network Structures with Complete Phononic Bandgaps Article 10.1021/acs.jpcc.7b07267 1 The Journal of Physical Chemistry C, v.121, no.40, pp.22347 - 22352 The Journal of Physical Chemistry C 121 40 22347 22352 scie scopus 000413131700062 2-s2.0-85031318086 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article MINIMAL-SURFACES BLOCK-COPOLYMERS ELASTIC-WAVES Block Copolymer Phononics Phononic Band Gap Thermal Conductivity Finite Difference Methods