The photoresist utilized to fabricate the microrobot consisted of a 468 mg mixture of 47 vol% PEG-700 (Poly(ethylene glycol) diacrylate with a molecular weight of 700, Sigma-Aldrich), 28 vol% PEG-250 (Poly(ethylene glycol) diacrylate with a molecular weight of 250, Sigma-Aldrich), 14 vol% buffer solution (Tris-EDTA buffer solution, Sigma-Aldrich) and 11 vol% photoinitiator (2-hydrox-2-methylpropiophenone, Sigma-Aldrich). 7.4 mg of superparamagnetic microparticles (Amino paramagnetic particles 1–2 micron, CAT# 18879, Polysciences, Inc.) and 8.5 μL rhodamine solution (Rhodamin B, Sigma-Aldrich) were added to the photoresist mixture to allow for magnetic control and to enable fluorescent imaging of the microrobots. In the viscous mixing experiment, a droplet (5 μL) of glycerol (Sigma-Aldrich) fluorescent dyed with Rhodamin B (Sigma-Aldrich) is used.
Peg 700
Manufactured by Merck Group
PEG 700 is a polyethylene glycol compound with an average molecular weight of 700 g/mol. It is a clear, viscous liquid that is soluble in water and organic solvents. PEG 700 is commonly used as a solvent, plasticizer, and surfactant in various industrial and pharmaceutical applications.
Automatically generated - may contain errors
Lab products found in correlation
Darocur 1173, by Merck Group (2 mentions)
Peg 258, by Merck Group (2 mentions)
Rhodamin b, by Merck Group (1 mentions)
Tris edta buffer solution, by Merck Group (1 mentions)
Glycerol, by Merck Group (1 mentions)
Rhodamine b solution, by Merck Group (1 mentions)
Darocur 1173, by Novartis (1 mentions)
Rhodamine b, by Merck Group (1 mentions)
4 protocols using peg 700
1
Magnetically Controlled Microrobot Fabrication
2
Photosensitive Polymer Microfabrication
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The utilized photosensitive mixture is composed of a synthetic polymer (Polyethylene glycol with a molecular weight of 700, PEG 700, Sigma-Aldrich) and a photo-initiator (2-hydroxy-2-methyl-1-phenyl-propan-1-one, Darocur 1173, Sigma-Aldrich) at a ratio of 5:1. The photo-initiator will trigger the crosslink of PEG 700 when exposed to UV light. One droplet (~30 μL) of Rhodamine B solution (Sigma-Aldrich) is added to the mixture (5 mL) to align the mask, and one droplet (~30 μL) of blue food dye is added to the solution to visualize the fabricated micromachines.
3
Photocrosslinkable Microswimmer Fabrication
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The microswimmers were fabricated using a mixture of photo-crosslinkable
polyethylene glycol (PEG) and a photo-initiator. The mixture consisted of 40%
(v/v) PEG diacrylate with a molecular weight of 700 (PEG700, from
Sigma-Aldrich), 25% (v/v) PEG with a molecular weight of 258 (PEG 258, from
Sigma-Aldrich), 15% (v/v) photo-initiator
2-Hydroxy-2-methyl-1-phenyl-propan-1-one (Darocur 1173, from Ciba), 15% (v/v) TE
buffer (100 TE, from OmniPur), and 5% (w/v) fluorescein.
polyethylene glycol (PEG) and a photo-initiator. The mixture consisted of 40%
(v/v) PEG diacrylate with a molecular weight of 700 (PEG700, from
Sigma-Aldrich), 25% (v/v) PEG with a molecular weight of 258 (PEG 258, from
Sigma-Aldrich), 15% (v/v) photo-initiator
2-Hydroxy-2-methyl-1-phenyl-propan-1-one (Darocur 1173, from Ciba), 15% (v/v) TE
buffer (100 TE, from OmniPur), and 5% (w/v) fluorescein.
4
Photosensitive PEG Hydrogels for Microrobotics
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The photosensitive polymer mixture used in this project consists of photo-cross-linkable polyethylene glycols (PEGs) and a photo-initiator. The ratios of each component in the mixture were: 50% (v/v) PEG diacrylate with a molecular weight of 700 (PEG 700, Sigma-Aldrich), 30% (v/v) PEG diacrylate with a molecular weight of 258 (PEG 258, Sigma-Aldrich), 15% (v/v) TE buffer (100 TE, Sigma-Aldrich), and 5% (v/v) photo-initiator 2-hydroxy-2-methyl-1-phenyl-propan-1-one (Darocur 1173, Sigma-Aldrich) as photo-initiator. In addition, a droplet (~50 μl) each of fluorescent Rhodamine B (Sigma-Aldrich) and food dye were added to facilitate the focusing of the photomask and to achieve better contrast for the microrobots suspended in DI water.
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