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Volumn 23, Issue 10, 2007, Pages 5419-5422

Multilevel surface nano- And microstructuring via sequential photoswelling of dichromated gelatin

Author keywords

[No Author keywords available]

Indexed keywords

DICHROMATED GELATINS; HYDRATION STATE; SURFACE RELIEFS;

EID: 34249665454     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la062982c     Document Type: Article
Times cited : (4)

References (41)
  • 1
  • 25
    • 34249730413 scopus 로고    scopus 로고
    • Mechanism of enzyme-etching dichromated gelatin and swelling of gelatin
    • Karam, J. M, Yasaitis, J, Eds, SPIE: Bellingham, WA
    • Li, H.; Huang, X. Mechanism of enzyme-etching dichromated gelatin and swelling of gelatin. In Micromachining and microfabrication process technology VII; Karam, J. M., Yasaitis, J., Eds.; SPIE: Bellingham, WA, 2001
    • (2001) Micromachining and microfabrication process technology VII
    • Li, H.1    Huang, X.2
  • 26
    • 34249745065 scopus 로고    scopus 로고
    • Grayscale images of 1 mm-wide stripes, of 5 different linear gray levels in a stair-step pattern, were drawn using Freehand 8. They were printed on a 92-96 brightness office paper at the highest resolution (ProRes 212 lpi) of an HP LaserJet 4200n printer. Photos were taken of the printout with an SLR camera, using a 70 mm lens, on a 35 mm KodakT-Max 100 B/W film using side illumination from two 50 W halogen lamps. The 8.5 × 11″ letter images were fully fit into the frame of the 22 × 29 mm negative image resulting in a 9.6× reduction in size. The film was developed at a local photographic store (Triangle Camera) and the negatives were used as photolithographic masks directly in contact with the gels.
    • Grayscale images of 1 mm-wide stripes, of 5 different linear gray levels in a stair-step pattern, were drawn using Freehand 8. They were printed on a 92-96 brightness office paper at the highest resolution (ProRes 212 lpi) of an HP LaserJet 4200n printer. Photos were taken of the printout with an SLR camera, using a 70 mm lens, on a 35 mm KodakT-Max 100 B/W film using side illumination from two 50 W halogen lamps. The 8.5 × 11″ letter images were fully fit into the frame of the 22 × 29 mm negative image resulting in a 9.6× reduction in size. The film was developed at a local photographic store (Triangle Camera) and the negatives were used as photolithographic masks directly in contact with the gels.
  • 27
    • 34249724890 scopus 로고    scopus 로고
    • Note that the heights of the features decrease slightly with t for irradiation times longer than ∼1 min. This can be attributed to the diffusion of generated Cr(III) ions from the irradiated into the masked regions, where they crosslink the background gel and cause it to swell.
    • Note that the heights of the features decrease slightly with t for irradiation times longer than ∼1 min. This can be attributed to the diffusion of generated Cr(III) ions from the irradiated into the masked regions, where they crosslink the "background" gel and cause it to swell.
  • 31
    • 34249740895 scopus 로고    scopus 로고
    • 3+ ions to gelatin gives rise to electrostatic repulsions and causes extension of the polymer's chains. For more information on these effects, please see refs 32 and 33.
    • 3+ ions to gelatin gives rise to electrostatic repulsions and causes extension of the polymer's chains. For more information on these effects, please see refs 32 and 33.
  • 40
    • 34249737899 scopus 로고    scopus 로고
    • The pattern was replicated into h-PDMS as follows: a mixture of 3.4 g of VDT-731, 25μL of Pt-divinyltetramethylsiloxane catalyst (Gelest, SIP 6831.1), and 1 drop of modulator (2,4,6,8-tetramethyltetravinyl-cyclotetrasiloxane, Aldrich; 87927) added using a 19 gauge needle was degassed under vacuum for 1 min, and then 1g of trimethylsiloxy-terminated methylhydrosiloxanedimethylsiloxane copolymers (Gelest, HMS-301) was added. The mixture was immediately poured on the patterned surface, spincoated (40s, 1000 rpm, then 15 min 500 rpm) and covered with a 3-4 mm layer of PDMS. The polymer was dried in the dark for 48 h at room temperature and gently peeled off.
    • The pattern was replicated into h-PDMS as follows: a mixture of 3.4 g of VDT-731, 25μL of Pt-divinyltetramethylsiloxane catalyst (Gelest, SIP 6831.1), and 1 drop of modulator (2,4,6,8-tetramethyltetravinyl-cyclotetrasiloxane, Aldrich; 87927) added using a 19 gauge needle was degassed under vacuum for 1 min, and then 1g of trimethylsiloxy-terminated methylhydrosiloxanedimethylsiloxane copolymers (Gelest, HMS-301) was added. The mixture was immediately poured on the patterned surface, spincoated (40s, 1000 rpm, then 15 min 500 rpm) and covered with a 3-4 mm layer of PDMS. The polymer was dried in the dark for 48 h at room temperature and gently peeled off.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.