Phase segregation enabled scandium fluoride–lanthanide fluoride Janus nanoparticles

2018 ◽  
Vol 5 (8) ◽  
pp. 1800-1804 ◽  
Author(s):  
Pei-Zhi Zhang ◽  
Rui Liu ◽  
Ling-Dong Sun ◽  
Hao Dong ◽  
Lin-Dong Li ◽  
...  
Keyword(s):  
Phase Segregation ◽  
Janus Particles ◽  
Janus Nanoparticles ◽  
Lanthanide Fluoride

A phase-segregation based protocol enables the fabrication of a series of scandium fluoride–lanthanide fluoride Janus particles.

Controlled fabrication of polymeric Janus nanoparticles and their solution behaviors

RSC Advances ◽  
2016 ◽  
Vol 6 (107) ◽  
pp. 105070-105075 ◽  
Author(s):  
Wei Zhang ◽  
Jinxin He ◽  
Xia Dong
Keyword(s):  
Janus Particles ◽  
Janus Nanoparticles

Well-defined Janus particles with tunable Janus balances are achieved, and the influences of Janus balance have been discussed in detail.

scholarly journals Inorganic Janus particles for biomedical applications

2014 ◽  
Vol 5 ◽  
pp. 2346-2362 ◽  
Author(s):  
Isabel Schick ◽  
Steffen Lorenz ◽  
Dominik Gehrig ◽  
Stefan Tenzer ◽  
Wiebke Storck ◽  
...  
Keyword(s):  
Self Assembly ◽  
Biomedical Application ◽  
Inorganic Compounds ◽  
Janus Particles ◽  
Precise Control ◽  
Size Dependent ◽  
Two Photon ◽  
Janus Nanoparticles ◽  
Recent Developments ◽  
Theranostic Agents

Based on recent developments regarding the synthesis and design of Janus nanoparticles, they have attracted increased scientific interest due to their outstanding properties. There are several combinations of multicomponent hetero-nanostructures including either purely organic or inorganic, as well as composite organic–inorganic compounds. Janus particles are interconnected by solid state interfaces and, therefore, are distinguished by two physically or chemically distinct surfaces. They may be, for instance, hydrophilic on one side and hydrophobic on the other, thus, creating giant amphiphiles revealing the endeavor of self-assembly. Novel optical, electronic, magnetic, and superficial properties emerge in inorganic Janus particles from their dimensions and unique morphology at the nanoscale. As a result, inorganic Janus nanoparticles are highly versatile nanomaterials with great potential in different scientific and technological fields. In this paper, we highlight some advances in the synthesis of inorganic Janus nanoparticles, focusing on the heterogeneous nucleation technique and characteristics of the resulting high quality nanoparticles. The properties emphasized in this review range from the monodispersity and size-tunability and, therefore, precise control over size-dependent features, to the biomedical application as theranostic agents. Hence, we show their optical properties based on plasmonic resonance, the two-photon activity, the magnetic properties, as well as their biocompatibility and interaction with human blood serum.

scholarly journals A Research of Stereo-Selective Synthesis of Silica-based Amphiphilic Janus Particles

2021 ◽  
Vol 2133 (1) ◽  
pp. 012016
Author(s):  
Shichao Wang
Keyword(s):  
Emulsion Polymerization ◽  
Volume Ratio ◽  
Nucleation Site ◽  
Complete Separation ◽  
Janus Particles ◽  
Hydrophobic Region ◽  
Janus Nanoparticles ◽  
New Research ◽  
Silicon Based ◽  
Seed Emulsion Polymerization

Abstract Because Janus particles with specific asymmetric nanostructures can be fixed in the oil phase or water respectively, they are more suitable for Pickering emulsion stability. Furthermore, the complete separation of hydrophobic and hydrophobic regions makes adjusting the hydrophobic/hydrophobic region ratio possible by changing the volume ratio. In this study, the preparations of three asymmetric silicon-based amphiphilic Janus nanoparticles are introduced. The methods used are consecutive immobilization, seed emulsion polymerization, and selective encapsulation, respectively. Complete compartmentalization of hydrophilic and hydrophobic domains was realized by anchoring silica with nucleation site, seed emulsion polymerization, or surface charge repulsion. In addition, these nanoparticles can be easily functionalized, bringing new research opportunities to applications in catalysis, adsorption, separation and biomedicine.

Cooperative assembly of Janus particles and amphiphilic oligomers: the role of Janus balance

Nanoscale ◽  
2019 ◽  
Vol 11 (15) ◽  
pp. 7221-7228 ◽  
Author(s):  
Jiawei Li ◽  
Junfeng Wang ◽  
Qiang Yao ◽  
Kai Yu ◽  
Youguo Yan ◽  
...  
Keyword(s):  
Spatial Localization ◽  
Janus Particles ◽  
Janus Nanoparticles ◽  
Hybrid Assemblies ◽  
Cooperative Assembly

The spatial localization of Janus nanoparticles within hybrid assemblies can be controlled by regulating the Janus balance of nanoparticles.

Reactive amphiphilic hollow SiO2 Janus nanoparticles for durable superhydrophobic coating

Nanoscale ◽  
2020 ◽  
Vol 12 (31) ◽  
pp. 16443-16450 ◽  
Author(s):  
Yan Bao ◽  
Yuanxia Zhang ◽  
Jianzhong Ma
Keyword(s):  
Janus Particles ◽  
Superhydrophobic Coating ◽  
Janus Nanoparticles

A study of durable superhydrophobic coating fabricated by the reactive amphiphilic hollow SiO2 Janus particles.

scholarly journals Travelling-Wave Dipolophoresis: Levitation and Electrorotation of Janus Nanoparticles

Micromachines ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 114
Author(s):  
Touvia Miloh ◽  
Jacob Nagler
Keyword(s):  
Theoretical Study ◽  
Weak Field ◽  
Travelling Wave ◽  
Janus Particles ◽  
Time Harmonic ◽  
Janus Nanoparticles ◽  
Polarizable Particle ◽  
Analytic Expressions ◽  
Angular Velocities ◽  
Freely Suspended

We present a theoretical study of the hydrodynamic and electrokinetic response of both metallic spherical polarized colloids as well as metallodielectic Janus particles, which are subjected to an arbitrary non-uniform ambient electric field (DC or AC forcing). The analysis is based on employing the linearized ‘standard’ model (Poisson–Nernst–Planck formulation) and on the assumptions of a ‘weak’ field and small Debye scale. In particular, we consider cases of linear and helical time-harmonic travelling-wave excitations and provide explicit expressions for the resulting dielectrophoretic and induced-charge electrophoretic forces and moments, exerted on freely suspended particles. The new analytic expressions thus derived for the linear and angular velocities of the initially uncharged polarizable particle are compared against some available solutions. We also analyze the levitation problem (including stability) of metallic and Janus particles placed in a cylindrical (insulating or conducting) pore near a powered electrode.

Nanostructured Polymer Brushes With Reversibly Changing Properties

2002 ◽  
Vol 727 ◽  
Author(s):  
Denys Usov ◽  
Manfred Stamm ◽  
Sergiy Minko ◽  
Christian Froeck ◽  
Andreas Scholl ◽  
...  
Keyword(s):  
Polymer Brushes ◽  
Phase Segregation ◽  
Water Contact ◽  
Angle Measurements ◽  
Nanostructured Polymer ◽  
Contact Angle Measurements ◽  
Vertical Segregation ◽  
Oxygen Plasma Etching ◽  
Grafting From ◽  
Photoemission Electron

AbstractWe investigated the interplay between different mechanisms of the lateral and vertical segregation in the synthesized via “grafting from” approach symmetric A/B (where A and B are poly(styrene-co-2,3,4,5,6-pentafluorostyrene) and poly(methylmethacrylate), respectively) polymer brushes upon exposure to different solvents. We used X-ray photoemission electron spectroscopy and microscopy (X-PEEM), AFM, water contact angle measurements, and oxygen plasma etching to study morphology of the brushes. The ripple morphology after toluene (nonselective solvent) revealed elongated lamellar-like domains of A and B polymers alternating across the surface. The dimple-A morphology consisting of round clusters of the polymer A was observed after acetone (selective solvent for B). The top layer was enriched with the polymer B showing that the brush underwent both the lateral and vertical phase segregation. A qualitative agreement with predictions of SCF theory was found.

scholarly journals Active Janus particles in a complex plasma

2020 ◽  
Vol 2 (3) ◽  
Author(s):  
V. Nosenko ◽  
F. Luoni ◽  
A. Kaouk ◽  
M. Rubin-Zuzic ◽  
H. Thomas
Keyword(s):  
Janus Particles ◽  
Complex Plasma

scholarly journals Influence of the Active Layer Structure on the Photovoltaic Performance of Water-Soluble Polythiophene-Based Solar Cells

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1640
Author(s):  
Massimiliano Lanzi ◽  
Debora Quadretti ◽  
Martina Marinelli ◽  
Yasamin Ziai ◽  
Elisabetta Salatelli ◽  
...  
Keyword(s):  
Solar Cells ◽  
Layer Structure ◽  
Photovoltaic Performance ◽  
Phase Segregation ◽  
Water Soluble ◽  
Polymerization Reaction ◽  
Fullerene Derivative ◽  
C60 Fullerene ◽  
Photovoltaic Efficiency ◽  
Single Material

A new side-chain C60-fullerene functionalized thiophene copolymer bearing tributylphosphine-substituted hexylic lateral groups was successfully synthesized by means of a fast and effective post-polymerization reaction on a regioregular ω-alkylbrominated polymeric precursor. The growth of the polymeric intermediate was followed by NMR spectrometry in order to determine the most convenient reaction time. The obtained copolymer was soluble in water and polar solvents and was used as a photoactive layer in single-material organic photovoltaic (OPV) solar cells. The copolymer photovoltaic efficiency was compared with that of an OPV cell containing a water-soluble polythiophenic homopolymer, functionalized with the same tributylphosphine-substituted hexylic side chains, in a blend with a water-soluble C60-fullerene derivative. The use of a water-soluble double-cable copolymer made it possible to enhance the control on the nanomorphology of the active blend, thus reducing phase-segregation phenomena, as well as the macroscale separation between the electron acceptor and donor components. Indeed, the power conversion efficiency of OPV cells based on a single material was higher than that obtained with the classical architecture, involving the presence of two distinct ED and EA materials (PCE: 3.11% vs. 2.29%, respectively). Moreover, the synthetic procedure adopted to obtain single material-based cells is more straightforward and easier than that used for the preparation of the homopolymer-based BHJ solar cell, thus making it possible to completely avoid the long synthetic pathway which is required to prepare water-soluble fullerene derivatives.

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