Kinetics of Nanoparticle Reassembly Mediated by UV-Photolysis of Surfactant

Abstract

Real-time reassembly of an ordered nanoparticle monolayer due to UV-photolysis of the surfactant shell of nanoparticles was observed. The technique of grazing-incidence small-angle X-ray scattering provided the possibility to track in situ the nanoparticle pair correlation function of the sample processed in a UV-ozone reactor. The analysis revealed a total shift of approximately 1 nm of the nanoparticle nearest-neighbor distance. The temporal evolution of the interparticle distance proved to be the first-order process governed by the UV-photolysis and described by a single-exponential decay function. The nanoparticles tend to agglomerate into a labyrinth-like structure with a typical length scale of some 30 nm.

Nonequilibrium Phases of Nanoparticle Langmuir Films

“…The nanoparticle Langmuir film at the end of stage II is suitable for the transfer onto a solid substrate to deposit a high-quality nanoparticle monolayer over large area as we documented by the scanning electron microscopy. 27 We can compare this stage to the liquid-expanded phase of the molecular Langmuir films. 9 In stage III, we observe a steeper increase in the surface pressure followed by a maximum in the surface elastic modulus.…”

Effects of Magnetic Nanoparticles and External Magnetostatic Field on the Bulk Heterojunction Polymer Solar Cells

“…However, in BHJ-Fe 3 O 4 W/H, a diffraction peak along Q y direction is located at 0.08 Å −1 , which indicates an ordered, self-assembled Fe 3 O 4 MNPs was formed (see Fig. 5B ) 35 . Moreover, the value of 0.08 Å −1 corresponds to an interparticle spacing of 76.6 Å, where Q y is a component of scattering vector.…”

Review on Electrical Resistivity of Oxide Materials Using Fuzzy Logic

“…Silver-o xygen system (AgO) was extensively attracted by researchers due to its novel applications in high density optical storage devices, gas sensors, photovoltaic cells, photo diodes, and antibacterial coatings [1][2][3][4][5][6]. This system exists in d ifferent defined compounds, namely, Ag 2 …”

“…The raw materials fro m which this high performance technical grade ceramic is made are readily available and reasonably priced, resulting in good value for the cost in fabricated alu mina shapes. [6] A lu miniu m o xide, co mmon ly referred to as alu mina, possesses strong ionic interato mic bonding giving rise to it 's desirable material characteristics. It can exist in several crystalline phases which all revert to the most stable hexagonal alpha phase at elevated temperatures.…”