Interfacial Assembly of Dye‐Doped Microparticles Driven by Combined Optical and Non‐Optical Forces
Year: 2025
Type: article
Abstract: Optical trapping has emerged as an alternative method for controlling the assembly of nano‐ and microparticles at the microscale. This process involves optical, electrostatic, capillary, and hydrodynamic forces. Additionally, absorption forces also come into play for particles containing chromophores. This work proposes and experimentally demonstrates a model for photoexcitation‐mediated particle assembling using single particle tracking analysis. The dispersed dye‐doped microparticles are pushed toward the air/solution interface by absorption force, leading to their association and formation of hexagonal‐close‐packed (HCP) assemblies. These observations indicate that the assembly is facilitated by coupling the absorption force with other non‐optical forces. The results presented show the potential of using absorption forces to control and modify the structural order of particles, for optical assemblies as well as for general self‐assembly of various materials (e.g., polymers, proteins) at an interface.
Source: Advanced Optical Materials
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,880
Funders: National Science and Technology Council, Natural Science Foundation of Jilin Province, Fonds Wetenschappelijk Onderzoek, KU Leuven, Ministry of Education, India, China Scholarship Council, Vlaamse regering, National Science and Technology Council, Universitaire Ziekenhuizen Leuven, KU Leuven, Agencia Estatal de Investigación, Spanish National Plan for Scientific and Technical Research and Innovation, HORIZON EUROPE European Innovation Council
Awards: G1060477534, Fluorescence microscopy, a versatile tool to unravel polymer properties, Optical Trapping Formation of Single Droplet and Amyloid Fibril at Solution Surface, G1334747047, G1561925909, G2569964788, Super-resolved imaging of the swarming behavior of nanoparticles during optical trapping: the role of optohydrodynamics, G3222102889, G3571336446, G3640778061, G3898082369, G4113183243, G4741050416, G4789049003, G5229914382, G541753517, Investigation of collective dynamics of nanoparticles, G6300701200, G7038413624, Future Data Storage Using Colloidal Memory Technology, G8412477347, G8624121135, Optical binding of nanoparticles outside the photon beam: the creation of primeval optical matter
OpenAlex ID: W4414573444