Kim, Daeun Ko, Jaehyoung Kim, Young­Kyeong Lee, Sang Seok Ahn, Seokhoon Lee, Sanghan Jang, Se Gyu Joo, Yongho 2024-10-07T08:31:32Z 2024-10-07T08:31:32Z 2024-10-07 2024-11 https://pubs.kist.re.kr/handle/201004/150743 1D nanomaterials feature distinct physical properties owing to their characteristic anisotropy and size-induced quantization; yet, creating an ordered ensemble of the nanomaterials is nontrivial, marking it as a grand challenge in materials science. Herein, the spontaneous alignment of a model 1D nanomaterial, boron nitride nanotube (BNNT), into a highly ordered multidomain film is presented. A conventional, benchtop gravity filtration is employed, during which thickening of the BNNT dispersion leads to a formation of the liquid crystal (LC) phase that is readily isolatable. The spontaneity of the phase separation excludes notoriously persisting synthetic impurities to a degree >99%, from ？50% of the initial material purity. The LC-based thin film features an aligned multidomain with an exceptionally low angular deviation of <2.5° and a domain size of >50？μm. A piezoelectric nanogenerator based on the thin film records a 1000-fold increase in the piezocurrent compared to its random analog. This work demonstrates the first example of the spontaneous alignment of an unconventional nanotube system and the realization of the macroscopic properties therefrom, which can be readily expanded to 1D materials in general. English WILEY Spontaneous Alignment of Boron Nitride Nanotubes into Polycrystalline Film Arrays for Enhanced Piezoelectric Nanogeneration Article 10.1002/sstr.202400259 1 Small Structures, v.5, no.11 Small Structures 5 11 Y scie scopus 001325160800001 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article; Early Access CARBON SCAFFOLDS FIBERS THERMAL-CONDUCTIVITY liquid crystal nanotubes spontaneous alignment macroscopic assembly