Introductory Chapter: Integrated Circuit Chip

Yeap, Kim Ho; Isa, M. Mohamad; Loh, Siu Hong

doi:10.5772/intechopen.92818

Cited by 2 publications

(2 citation statements)

References 13 publications

(13 reference statements)

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“…Surface patterning is the key technology for the fabrication of microchips used in semiconductor and biomedical applications. Patterned surfaces and thin films also produce structural color, affect friction and wear, and control wetting .…”

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Graphene Oxide Nanosheets as 2D Cationic Photoinitiators with Enhanced Photoluminescence for Chemical Patterning

Un-no,

Kanazawa,

Yonenaka

et al. 2023

ACS Appl. Nano Mater.

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UV irradiation on native graphene oxide (GO) surfaces in a cation-forming liquid yields surface cationic species that graft the reaction product directly on the GO surface. These surface cations also enhance the intrinsic photoluminescence of GO. The formation of pyrylium as the surface cation is proposed to be responsible for both effects. Using a micrometer-scale photomask, GO itself is used as a 2D platform to form chemical patterns by photoluminescence, cationic polymerization, and reactions with nucleophiles under UV or visible light exposure. Postpatterning by adsorption and fabricating a functionally graded surface are also described for further applications. Our finding offers a versatile light-exposure-based technique to mass-produce the GO microchips with a high integration density.

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“…Since no aromatic group exists in PTHF, this linkage must belong to the grafting site on GO. 1 H NMR of GO-PTHF (Figure 1B) indicates the presence of a tertiary oxonium ion at δ = 4.85 and 2.4 ppm. 28,29 These results imply that GO functions as a 2D cationic photoinitiator.…”

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confidence: 99%