Surface engineering for anti-fingerprint applications

Gopal, Lakshmi; Sudarshan, T. S.

doi:10.1080/02670844.2022.2131043

Cited by 12 publications

(6 citation statements)

References 14 publications

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“…Selecting any point (expressed as O 2 ) on function (6) for force analysis, it shows that the component force of the F C on the x-axis and the F PU jointly determine the boundary size of the spoon, while the components of F C and F FP on the z-axis jointly determine the depth of the spoon. Based on the interface intelligent control mechanism of "vacancy capture", the freely switching of the coating surface structure between the micro/nano-pore to spoon with different sizes and numbers is realized.…”

Section: Resultsmentioning

confidence: 99%

“…The pursuit of aesthetic and clean appearance has been arousing enormous requirements toward anti-fingerprint surfaces in various fields such as interactive systems, optical lenses, automotive interiors and packaging. [1][2][3][4][5][6] To avoid the formation of fingerprint smudges (epidermis, grease) on the glass surface, two major anti-fingerprint strategies have been developed. [7][8][9][10][11][12][13] The first method is the glass-nanostructure strategy by etching smooth glass surface into nanostructure has been used to reduce depositing area or adhesive force for fingerprint smudging.…”

Section: Introductionmentioning

confidence: 99%

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Micro/Nano‐Pores and Anti‐Fingerprint Coating by Vacancy‐Capture and Interface Intelligent Control

Luo

Hao

et al. 2023

Adv Materials Inter

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Cu dewetting-masking seems limited for large-scale fabrication.The second method is the amphiphobic coating strategy since fingerprint smudging are mainly composed of water and skin oil (sebum). [15] Although the crystal structure of inorganic coatings is conducive to transparency, the chemical stability for current inorganic coatings limited their application. Thus, anti-fingerprint researches mainly focus on organic amphiphobic coatings. A thin film of polyaniline (PANI) nanofibers on the stainless steels with fluoro-thiol modification was prepared through an optimal polymerization time of aniline using HClO 4 as a dopant, showing transparent and anti-fingerprint properties. [16] Sun et al deposited silicon dioxide (SiO 2 ) onto polycarbonate (PC) substrates via the pulse laser deposition, followed by grafted trichloro(1H,1H,2H,2H-perfluorooctyl) silane (PFTS) on the silica surface. [17] Wang et al adopted vapor phase deposition technology to graft 1H,1H,2H,2H-perfluorodecyltrichlorosilane (PFDTS) onto glass surfaces modified with chitin nanofibers (ChNFs), achieving water contact angles at 156°and oil contact angles at 97°, respectively. [18] The above research shows that using fluoropolymer to reduce surface energy and controlling surface roughness could simultaneously achieve the hydrophobicity and transparency of organic coatings, which are with potential conflict recognized as one of the most challenging issues for anti-fingerprint coating's designing. [19][20][21][22][23][24] Furthermore, fabricating micro/nano-structure is typically one of the strategies for regulating surface roughness. Cao et al fabricated porous Si films by a convenient gold-assisted electroless etching process, which possess a hierarchical porous structure consisting of micrometer-sized asperities superimposed onto a network of nanometer-sized pores. [25] Bellanger et al synthesized an original series of fluorinated EDOP derivatives as monomers for the elaboration of superoleophobic surfaces by electrochemical polymerization. The authors proposed that the introduction of methylene unit between the EDOP heterocycle and the fluorinated chain turn on/off micro-to nanostructuration. [26] Caruso et al prepared porous silica films with thicknesses of 60≈130 µm and with meso-and macro-scale pores by using both porous membrane templates and amphiphilic supramolecular aggregates as pore-forming agents. [27] Kusakabe et al fabricated porous silica membranes by a sol-gel technique on a γ-aluminacoated α-alumina tube using sols from tetraethoxysilane (TEOS) and octyl-, dodecyl-or octadecyltriethoxysilane. [28] In addition,this work, a simple anti-fingerprint strategy (reduced ≈40-60%) to rearrange fingerprint droplets by patterned micro/nano-pore/spoons texture, air cushion and low surface energy is reported. Superior to previous precise and complex preparation methods, the micro/nano-texture are fabricated through conventional process of spray and dip. The pore and spoon can be freely switched by changing the process. The number (N) and size (r...

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Micro/Nano‐Pores and Anti‐Fingerprint Coating by Vacancy‐Capture and Interface Intelligent Control

Luo

Hao

et al. 2023

Adv Materials Inter

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“…It is imperative to highlight that, due to the continual advancements in anti-fingerprint technology research, anti-fingerprint coatings have been adopted across a myriad of modern applications. Such applications include control panels in automobiles, 6,7 high-gloss automotive plastics, 8,9 optical lenses, [10][11][12][13] architectural glazing, 14,15 elevator interface panels, 16 and several other domains, [17][18][19][20] as illustrated in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

Transparent anti-fingerprint glass surfaces: comprehensive insights into theory, design, and prospects

Wang,

Deng,

et al. 2024

Nanoscale

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“…Fingerprints are a common problem when it comes to the appearance and functionality of various surfaces, including glass, metals, and electronics. To solve this problem, many studies [1][2][3][4][5][6] have been conducted to form a surface with a self-clearing function. In general, this technology facilitates foreign substance removal from surfaces via superhydrophobic and superhydrophobic actions, and it has been commercialized for use in anti-fogging mirrors, glasses, and external walls of buildings [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Decomposition of Fingerprints on Porous TiO2 Thin Films

Lee

Kim

et al. 2023

Coatings

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This study investigated the effect of the mixing ratio of TiO2 nanoparticles (P25) and titanium alkoxide (T-sol) on various properties of TiO2 films. The specific surface area of the TiO2 film was determined using BET analysis, while the microstructure and thickness were analyzed by field emission scanning electron microscopy (FE-SEM) and atomic force microscopy (AFM), respectively. Transmittance and pencil hardness tests were conducted to evaluate the transparency and durability of the coating layer, respectively. The results showed that, as the P25 content increased, the specific surface area of the TiO2 film also increased, but this effect decreased as the ratio of T-sol to P25 increased. Additionally, the thickness and surface roughness (Ra) of the coating layer increased as the P25 content increased, with the thickness increasing from 210 to 950 nm and Ra increasing from 51 to 88 nm. However, the transmittance of the coating layer decreased as the P25 content increased, indicating that the films became less transparent. Furthermore, the pencil hardness of the coating layer decreased as the P25 content increased, indicating that the films became less durable. Finally, the oil contact angle decreased as the P25 content increased, indicating that the films became more hydrophilic.

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Surface engineering for anti-fingerprint applications

Cited by 12 publications

References 14 publications

Micro/Nano‐Pores and Anti‐Fingerprint Coating by Vacancy‐Capture and Interface Intelligent Control

Micro/Nano‐Pores and Anti‐Fingerprint Coating by Vacancy‐Capture and Interface Intelligent Control

Transparent anti-fingerprint glass surfaces: comprehensive insights into theory, design, and prospects

Decomposition of Fingerprints on Porous TiO2 Thin Films

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