Peg Surface Functionalization
Peg Surface Functionalization - Related Videos
07:50
Electrophysiology of Scorpion Peg Sensilla
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Cited by 4 •
2011
This article describes an electrophysiological method for isolating chemical stimulation to individual sensilla via extracellular, tip-recordings under mineral oil.
06:41
A Peg Plate Biofilm Assay for Screening Antibacterial Agents
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2025
This video demonstrates an assay for screening antimicrobial compounds that efficiently eliminate biofilms using a peg-plate. The methodology monitors the biofilm's metabolic state after treatment with antimicrobial compounds, facilitating the determination of the minimum biofilm eradication concentration.
09:21
Generation and Recovery of β-cell Spheroids From Step-growth PEG-peptide Hydrogels
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Cited by 5 •
2012
The following protocol provides techniques for encapsulating pancreatic β-cells in step-growth PEG-peptide hydrogels formed by thiol-ene photo-click reactions. This material platform not only offers a cytocompatible microenvironment for cell encapsulation, but also permits user-controlled rapid recovery of cell structures formed within the hydrogels.
04:54
Efficient Polyethylene Glycol (PEG) Mediated Transformation of the Moss Physcomitrella patens
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Cited by 60 •
2011
A simple and efficient method to transform Physcomitrella pantens protoplasts is described. This method is adapted from protocols for Physocmitrella protonemal protoplast and Arabidopsis mesophyll protoplast transformation1.
06:56
Particles without a Box: Brush-first Synthesis of Photodegradable PEG Star Polymers under Ambient Conditions
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Cited by 17 •
2013
Poly(ethylene glycol) (PEG) brush-arm star polymers (BASPs) with narrow mass distributions and tunable nanoscopic sizes are synthesized in via ring opening metathesis polymerization (ROMP) of a PEG-norbornene macromonomer followed by transfer of portions of the resulting living brush initiator to vials containing varied amounts of a rigid, photo-cleavable bis-norbornene crosslinker.
FAQs
The hydrated PEG layer retains water at the interface, creating a steric barrier that makes it harder for nonspecific proteins to approach and adsorb. This reduced adsorption can change subsequent cell interactions and molecular transport without requiring the material itself to be replaced. In biology, this helps explain why PEG coatings can improve biomaterial compatibility.
Chain length and grafting density determine the physical character of the interfacial PEG layer. Adjusting these variables changes the extent of steric shielding and can therefore influence protein adsorption, cell adhesion, and molecular transport. Because the desired balance differs among biomaterials, nanoparticles, biosensors, and implants, they must be selected in relation to the intended biological function.
Surface chemistry controls how PEG chains attach through reactive end groups or linker chemistry, while coating stability determines whether that modified interface remains intact in a biological environment. If attachment or stability changes, the layer may no longer provide the intended control over protein adsorption, cell interactions, or transport. These factors therefore affect the reliability of the functionalized material.
A typical workflow begins by selecting the material surface and a PEG molecule with a suitable reactive end group or linker. The attachment chemistry is then used to tether the chains to the surface, followed by adjustment of chain length or grafting density to obtain the desired interface. The resulting coating is considered in relation to stability and biological performance.
The approach is applied to biomaterials, nanoparticles, biosensors, and implanted devices when researchers need to control interactions with biological environments. Depending on the coating design, it can limit nonspecific protein adsorption, alter cell adhesion, or regulate molecular transport. These effects support efforts to improve biocompatibility while adapting a material's surface for a particular biological setting.
PEG layers can be designed not only to shield a surface but also to influence how ligands are presented to biological surroundings. Their interfacial structure can likewise affect molecular transport, making the strategy relevant to drug-release behavior. Chain length, grafting density, surface chemistry, and coating stability help determine whether shielding, ligand accessibility, or transport becomes the dominant outcome.