scholarly journals Thermally Stable High-Contrast Iridescent Structural Colours from Silica Colloidal Crystal Doped with Monodisperse Spherical Black Carbon Particles as Maverick

2021 ◽  
Author(s):  
Kosuke Nakamae ◽  
Nanami Hano ◽  
Hirotaka Ihara ◽  
Makoto Takafuji
Keyword(s):  
Silica Nanoparticles ◽  
Black Carbon ◽  
Conjugated Polymer ◽  
Carbon Nanoparticles ◽  
Colloidal Crystal ◽  
Average Diameter ◽  
High Contrast ◽  
Polymer Particles ◽  
Carbon Particles ◽  
Silica Colloidal Crystal

Monodisperse black carbon nanoparticles (average diameter: 272 and 511 nm) are prepared by carbonization of monodisperse spherical π-conjugated polymer particles. Meanwhile, silica nanoparticles of different sizes are prepared by conventional...

Colloidal Crystal Lasers from Monodisperse Conjugated Polymer Particles via Bottom-Up Coassembly in a Sol–Gel Matrix

ACS Nano ◽  
2016 ◽  
Vol 10 (11) ◽  
pp. 10195-10201 ◽  
Author(s):  
Annabel Mikosch ◽  
Sibel Ciftci ◽  
Alexander J. C. Kuehne
Keyword(s):  
Conjugated Polymer ◽  
Colloidal Crystal ◽  
Sol Gel ◽  
Polymer Particles ◽  
Bottom Up

DETERMINATION OF A SUITABLE CONDITION OF GRAFT COPOLYMERIZATION OF VINYLTRIETHOXYSILANE ONTO NR TO FORM NANOMATRIX STRUCTURE

2018 ◽  
Vol 91 (4) ◽  
pp. 767-775 ◽  
Author(s):  
Yuanbing Zhou ◽  
Yoshimasa Yamamoto ◽  
Seiichi Kawahara
Keyword(s):  
Silica Nanoparticles ◽  
Graft Copolymerization ◽  
Monomer Concentration ◽  
Minor Component ◽  
Suitable Condition ◽  
Average Diameter ◽  
Silica Matrix ◽  
Rubber Particles ◽  
Hydrolysis And Condensation ◽  
Nanomatrix Structure

ABSTRACT Graft copolymerization of vinyltriethoxysilane (VTES) onto NR particles in the latex stage is a unique reaction, since it occurs together with hydrolysis and condensation of the triethoxysilane group of VTES to form a colloidal silica linking to the rubber particles. These reactions may contribute to the formation of a silica nanomatrix structure that consists of a dispersoid of rubber particles as the major component and a silica matrix as the minor component. Here, the graft copolymerization of VTES followed by hydrolysis and condensation is investigated to determine a suitable condition to prepare NR with a silica nanomatrix structure. The mechanical properties of the resulting graft copolymer are discussed in relation to the morphology, silica content, and gel content of the rubber. Based on morphological observations, NR particles with an average diameter of approximately 1 μm are well dispersed in a nanomatrix consisting of silica nanoparticles. The thickness of the silica nanomatrix increases as the monomer concentration increases, and a long incubation time generates large silica nanoparticles. The tensile strength and viscoelastic properties are significantly improved by forming the silica nanomatrix structure, with its continuous structure that prevents the NR particles from merging.

scholarly journals Impact of biomass induced black carbon particles in cascading COVID-19

Urban Climate ◽  
2021 ◽  
pp. 100913
Author(s):  
Aditi Rathod ◽  
Gufran Beig
Keyword(s):  
Black Carbon ◽  
Carbon Particles

scholarly journals RGD-decorated conjugated polymer particles as fluorescent biomedical probes prepared by Sonogashira dispersion polymerization

2015 ◽  
Vol 51 (45) ◽  
pp. 9358-9361 ◽  
Author(s):  
Naveed Anwar ◽  
Anne Rix ◽  
Wiltrud Lederle ◽  
Alexander J. C. Kuehne
Keyword(s):  
Click Chemistry ◽  
Fluorescent Probes ◽  
Conjugated Polymer ◽  
Dispersion Polymerization ◽  
Cell Labelling ◽  
Polymer Particles ◽  
Free Thiol ◽  
One Step

We present a one-step Sonogashira dispersion polymerization generating monodisperse conjugated polymer particles with acetylene units on their surface. These moieties can be bio-functionalized using copper-free thiol-yne click chemistry providing fluorescent probes for cell labelling and imaging.

Conjugated polymer particles: towards self-assembling organic photonics

2013 ◽  
Author(s):  
Alexander J. C. Kuehne ◽  
Tobias Luelf ◽  
Matthias Wessling ◽  
Joris Sprakel
Keyword(s):  
Conjugated Polymer ◽  
Polymer Particles ◽  
Self Assembling ◽  
Organic Photonics

scholarly journals Impairing Proliferation of Glioblastoma Multiforme with CD44+ Selective Conjugated Polymer Nanoparticles

2021 ◽  
Author(s):  
Dorota Lubanska ◽  
Sami Alrashed ◽  
Gage T. Mason ◽  
Fatima Nadeem ◽  
Mitchell DiPasquale ◽  
...  
Keyword(s):  
Blood Brain Barrier ◽  
Conjugated Polymer ◽  
Average Diameter ◽  
Polymer Nanoparticles ◽  
Brain Barrier ◽  
Cycle Phase ◽  
Blood Brain ◽  
Brain Barrier Permeability ◽  
Conjugated Polymer Nanoparticles

Glioblastoma is one of the most aggressive types of cancer with median survival of only 15 months. Successful therapy is hampered by the existence of treatment resistant populations of stem-like tumour initiating cells (TICs) and poor blood-brain barrier drug penetration. Therapies capable of effectively targeting the TIC population are in high demand. Here, we synthesize spherical diketopyrrolopyrrole (DPP)-based conjugated polymer nanoparticles (CPNs) with an average diameter of 109 nm. The CPN were designed to include fluorescein-conjugated hyaluronic acid (HA), a ligand for the CD44 receptor present on one population of TICs. We demonstrate blood-brain barrier permeability of this system and concentration and cell cycle phase-dependent selective uptake of HA-CPNs in CD44 positive GBM-patient derived cultures. Interestingly, we found that uptake alone decreases stemness, invasive properties and proliferation of the CD44-TIC population in zebrafish PDX models in vivo. This study is the first to show surface moiety-driven selectivity of conjugated polymer nanoparticles in targeting TIC populations in brain cancer.

Preparation and Applications of Hydrophilic Nano-Carbon Particles

2013 ◽  
Vol 832 ◽  
pp. 767-772 ◽  
Author(s):  
Shoichiro Ikeda ◽  
Shinji Kawasaki ◽  
Akinari Nobumoto ◽  
Hideo Ono ◽  
Shinji Ono ◽  
...  
Keyword(s):  
Carbon Nanoparticles ◽  
Room Temperature ◽  
Ph Value ◽  
Pure Water ◽  
Solid Lubricants ◽  
Cutting Fluids ◽  
Carbon Particles ◽  
Synthetic Graphite ◽  
Nano Carbon

We have produced nanocarbon suspension in pure water, which is named as Nanocaloid®, by a simple DC electrolysis from a synthetic graphite plates as anodes and SUS plates as cathodes in purified water at room temperature. The amount of carbon nanoparticles was monitored by the conductivity and pH value of the electrolyte solution, and also by a simple gravimetric way after drying the solution. If the current density increases, the diameter of the carbon particles becomes larger and the amount of precipitates becomes also large. It takes about six weeks to obtain about 0.4 wt% carbon suspension solution under the normal electrolysis conditions. Characterization of Nanocaloid®has been conducted to show unique properties and promising epoch-making applications such as solid lubricants for non-oily cutting fluids and conductive agents for reuse of deteriorated Pb-acid batteries. The performance of nanocarbon particles in oil lubricants in addition to the preparation will be reported.

scholarly journals Measurement of Light Absorbing Aerosols with Folded-Jamin Photothermal Interferometry

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2615 ◽  
Author(s):  
Jeonghoon Lee ◽  
Hans Moosmüller
Keyword(s):  
Refractive Index ◽  
Black Carbon ◽  
Metropolitan Area ◽  
Atmospheric Aerosols ◽  
Urban Areas ◽  
Photothermal Spectroscopy ◽  
Interferometric Technique ◽  
Carbon Particles ◽  
Black Carbon Aerosol ◽  
Absorbing Aerosols

In this study, a photothermal interferometer was developed, based on a folded-Jamin polarization instrument with refractive-index sensitive configuration, in order to characterize light-absorbing aerosols. The feasibility of our interferometric technique was demonstrated by performing photothermal spectroscopy characterizing spark-generated black carbon particles with atmospherically relevant concentrations and atmospheric aerosols in a metropolitan area. The sensitivity of this interferometric system for both laboratory-generated aerosols and atmospheric aerosols was ~ 1 (μg/m3)/μV, which is sufficient for the monitoring of black carbon aerosol in urban areas.

scholarly journals Influences of Primary Emission and Secondary Coating Formation on the Particle Diversity and Mixing State of Black Carbon Particles

2019 ◽  
Vol 53 (16) ◽  
pp. 9429-9438 ◽  
Author(s):  
Alex K.Y. Lee ◽  
Laura-Hélèna Rivellini ◽  
Chia-Li Chen ◽  
Jun Liu ◽  
Derek J. Price ◽  
...  
Keyword(s):  
Black Carbon ◽  
Mixing State ◽  
Carbon Particles ◽  
Coating Formation
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