Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session B05: Nonequilibrium Structures and Dynamics of Polymeric Materials I
11:30 AM–2:18 PM,
Monday, March 6, 2023
Room: Room 128
Sponsoring
Unit:
DPOLY
Chair: Antonio Faraone, National Institute of Standards and Technology
Abstract: B05.00012 : Coaxial Conjugated Polymer/Quantum Rod Nanowires with Preferred Quantum Rod Orientation
2:06 PM–2:18 PM
Presenter:
Eunji Lee
(School of Materials Science and Engineering, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, 61005 Gwangju, Republic of Korea)
Author:
Eunji Lee
(School of Materials Science and Engineering, Gwangju Institute of Science and Technology, 123 Cheomdangwagi-ro, Buk-gu, 61005 Gwangju, Republic of Korea)
hold significant potential for fabrication of low-cost optoelectronic devices. Here we show the kinetically controlled crystallization-driven assembly of poly(3-hexylthiophene)-b-poly(2-
vinylpyridine) (P3HT-b-P2VP) conjugated polymers (CPs) and quantum rods (QRs) to generate p-n coaxial hybrid nanowires (NWs) with the desired QR alignment mode (end-to-end or side-by-side coupling) in a 1D nanolane. Co-crystallization of CPs and QRs, through the diffusion of a poor solvent to a good solvent containing the two components, allows NW formation through the structural evolution of CP-bridged QR dimeric seeds. The coupling mode of the QR array within a single NW is determined by the balance between the van der Waals and dipole-dipole interactions between QRs during the CP assembly. Because the interparticle attractive forces that provide a real colloidal system favor the misalignment of colloids, it is normally difficult to achieve the desired order of QRs. However, the location and orientation of QRs confined by CP bridging can be controlled kinetically by varying the solvent mixing rate affecting the CP crystallites and growth. This is confirmed by 3D electron tomography. This work provides a deep understanding of the complex and competitive
assembly of polymers and nanoparticles to form sophisticated nanohybrids. Moreover, it paves the way to overcoming the poor ability of nanorods to form a large area of oriented arrays, which is important in both fundamental research and applications, especially the performance optimization of
optoelectronics, photonics, and sensors.
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