Quantitative Determination of the Hydrophobicity of Nanoparticles ...
Jan 14, 2022 · The hydrophobicity of nanoparticles (NPs) is one of the most important physicochemical properties that determines their agglomeration state under various environmental conditions. When studying nano–bio interactions, it is found that the hydrophobicity of NPs plays a predominant role in mediating the biological response and toxicity of the NPs.
Hydrophobic Interactions Modulate Self-Assembly of Nanoparticles
Nov 28, 2012 · We describe here a general methodology for solvent-induced, reversible self-assembly of gold nanoparticles into 3D clusters with well-controlled sizes. A theoretical description of the process confirmed that hydrophobic interactions are the main driving force behind nanoparticle aggregation.
Preparation and Properties of Hydrophobically Modified Nano …
Mar 31, 2021 · This work focuses on satisfactorily toughening and reinforcing poly(lactic acid)/thermoplastic polyurethane (PLA/TPU) blend with low TPU content (10 wt%) using appropriate amts. of hydrophobic silica nanoparticles (SiO2) via simple melt mixing.
Shaping Nanoparticles with Hydrophilic Compositions and Hydrophobic …
Hydrophobic moieties such as alkanethiols and alkyl chains have been modified onto the surfaces of various nanoparticles including gold and silica to enhance the loading of hydrophobic drugs/protein and improve cellular delivery performance.
Nanoparticle Hydrophobicity Dictates Immune Response
Feb 17, 2012 · We present here the use of engineered gold nanoparticles to determine the sole effect of hydrophobicity on the immune response of splenocytes. The gene expression profile of a range of cytokines (immunological reporters) was analyzed against the calculated log P of the nanoparticle headgroups, with an essentially linear increase in immune ...
Relative Dye Adsorption Method for Determining the …
The hydrophobicity of nanoparticles (NPs) is a crucial physicochemical property that determines the agglomeration state of NPs under various environmental and biological conditions. It plays a predominant role in determining the toxicity and environmental, health, and safety impact of NPs.
Transparent, Superhydrophobic Surfaces from One-Step Spin …
Jan 31, 2012 · We study the nonwettability and transparency from the assembly of fluorosilane modified silica nanoparticles (F-SiO 2 NPs) via one-step spin-coating and dip-coating without any surface postpassivation steps. When spin-coating the hydrophobic NPs (100 nm in diameter) at a concentration ≥0.8 wt % in a fluorinated solvent, the surface exhibited ...
Facile Surface Functionalization of Hydrophobic Magnetic Nanoparticles
Aug 20, 2014 · To address this limitation, we have developed a facile, high efficiency, single-phase and low-cost method to convert hydrophobic magnetic nanoparticles (MNPs) to an aqueous phase using tetrahydrofuran, NaOH and 3,4-dihydroxyhydrocinnamic acid without any complicated organic synthesis.
Direct Assembly of Hydrophobic Nanoparticles to …
Jul 6, 2011 · Hydrophobic nanoparticles of various compositions and combinations can be directly assembled onto the host surface through the strong coordination interactions between metal cations and thiol groups. The resulting structures can be further conveniently overcoated with a layer of normal silica to stabilize the assemblies and render them highly ...
Evaluating Nanoparticle Hydrophobicity Using Analytical …
Jun 8, 2022 · Nanoparticle hydrophobicity is a key factor controlling the stability, adhesion, and transport of nanoparticle suspensions. Although a number of approaches have been presented for evaluating nanoparticle hydrophobicity, these methods are difficult to apply to larger nanoparticles and viruses (>100 nm in size) that are of increasing importance ...