Laser coloration of titanium films: New development for jewelry and decoration

Veiko, Vadim P.; Одинцова, Г. В.; Vlasova, E. A.; Andreeva, Yaroslava; Krivonosov, A.; Ageev, Eduard; Gorbunova, Elena V.

doi:10.1016/j.optlastec.2017.01.036

Cited by 25 publications

(8 citation statements)

References 15 publications

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“…Laser coloration of the metal surface has been reported for various metals and alloys, such as stainless steel [ 18 ] and titanium, [ 1,2 ] but the characteristics of the proposed laser process, including the microscopic features of the resultant structure, are very distinct from those of previous studies. [ 20 ] Conventional laser coloration with ultrashort pulses relies heavily on experimentally determined parameters, [ 1,2,18 ] and the resultant surface indicates severe cracks, [ 1 ] morphology changes, [ 19 ] and delamination [ 25 ] as a result of rapid heating and cooling; this limits the laser coloration as only a macroscopic coloration technique. In contrast, the proposed laser process generates predictable and reproducible coloration with seamless microscale transition characteristics, verifiable from the series of pointwise growth shown in Figure a.…”

Section: Resultsmentioning

confidence: 99%

“…A photothermal reaction by a focused laser in a precursor solution enables the site‐specific growth of an absorbing metal‐oxide film on a metallic substrate, and continuous coloration over a wide range of visible spectra has been achieved by a single parameter, that is, laser scanning speed. The controllability and scalability have been further verified through laser‐printed painting and large‐area coloration by a spatially modulated laser beam, [ 1,2,18,19 ] while modifying the thickness and crystallinity of the laser‐grown metal‐oxide film allow the rewritability of the proposed process to be a competitive route toward a customizable optical platform. The consistent and predictable reflection spectra, in addition to a highly smooth surface profile, allow a solution for ink‐free color printing and a potential element for reprogrammable optoelectronic devices, as confirmed by our proof‐of‐concept application to a rewritable bolometer.…”

Section: Introductionmentioning

confidence: 99%

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Digital Laser Micropainting for Reprogrammable Optoelectronic Applications

Lee

Kwon

Lim

et al. 2020

Adv Funct Materials

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Structural coloration is closely related to the progress of innovative optoelectronic applications, but the absence of direct, on‐demand, and rewritable coloration schemes has impeded advances in the relevant area, particularly including the development of customized, reprogrammable optoelectronic devices. To overcome these limitations, a digital laser micropainting technique, based on controlled thin‐film interference, is proposed through direct growth of the absorbing metal oxide layer on a metallic reflector in the solution environment via a laser. A continuous‐wave laser simultaneously performs two functions—a photothermal reaction for site‐selective metal oxide layer growth and in situ real‐time monitoring of its thickness—while the reflection spectrum is tuned in a broad visible spectrum according to the laser fluence. The scalability and controllability of the proposed scheme is verified by laser‐printed painting, while altering the thickness via supplementary irradiation of the identical laser in the homogeneous and heterogeneous solutions facilitates the modification of the original coloration. Finally, the proof‐of‐concept bolometer device verifies that specific wavelength‐dependent photoresponsivity can be assigned, erased, and reassigned by the successive application of the proposed digital laser micropainting technique, which substantiates its potential to offer a new route for reprogrammable optoelectronic applications.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Digital Laser Micropainting for Reprogrammable Optoelectronic Applications

Lee

Kwon

Lim

et al. 2020

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…changes in surface morphology and integrity, that affect the functional performance of processed parts. In another research, Veiko et al [23,24] demonstrated the high mechanical and chemical wear resistance of titanium dioxides' thin films. In particular, neither the morphology nor the appearance were affected after treating the film by abrasion for 5 minutes, immersing it either in 5% citric acid for 40 minutes or in ultrasonic bath for 20 minute, and soaking it for one hour in 200°C muffle furnace.…”

Section: Introductionmentioning

confidence: 99%

Erasing and rewriting of titanium oxide colour marks using laser-induced reduction/oxidation

Jwad

Walker

Dimov

2018

Applied Surface Science

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Laser-induced oxidation of metallic surfaces such as titanium is used in many application areas for colour marking due to its selectivity, cleanness and processing speed. However, as the generated colours are permanent this reduces the flexibility and applicability of this laser processing technology. Therefore, a method is reported in this paper to erase selectively the oxide-based colours using laser-induced oxygen reduction. Especially, the colour marks are reprocessed in a low oxygen environment employing a nanosecond laser. A low fluence was used in order to diffuse oxygen out into the atmosphere and yield a lower form of metal oxides or a pure metal. Any cumulative fluence exceeding 25 J/cm 2 was sufficient to erase any laser-induced colours on titanium substrates. The XPS analysis revealed that all fields were mainly comprised of TiO2 prior to erasing with only small contributions from Ti2O3 and TiO/TiN. Following the proposed laser-induced oxygen reduction, the relative concentration of TiO2 decreased substantially while the overall amount of Ti in the near surface region increased. The results clearly show that the erasing of oxide-based colour marks is only due to oxygen diffusion back into the atmosphere and there were not any signs of laser ablation.

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“…Titanium has high corrosion resistance and chemical stability, and is frequently used in implanting field [1,2] and aeronautics [3,4]. Titanium can be oxidized into titania to gain colourful appearance which finds its applications in building decoration [5][6][7][8][9][10][11] and jewellery [12][13][14]. Furthermore, Since Japanese scientists Fujishima and Honda first used semiconductor TiO 2 to decompose water into hydrogen and oxygen in 1972 [15], the photocatalytic material technology using semiconductor as photocatalyst has become one of hot research directions in the field of clean energy.…”

Section: Introductionmentioning

confidence: 99%

Study on the photoelectrical performance of anodized titanium sheets

Chen

et al. 2021

R. Soc. open sci.

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Anodization is a widely used method to obtain multicoloured oxidized titanium sheets. However, most researchers paid great attention to the colour-related properties instead of photoelectrical properties of titanium oxide film obtained by anodization. In this work, to study their photoelectrical properties, a series of multicoloured oxidized titanium sheets were prepared by anodization method, and UV–vis absorption and photocurrents were tested. The relationship between anodization voltages/anodization durations and photocurrents of titanium sheets was studied. Results show that titanium sheets have excellent photoelectrical performance. With the increase of anodization voltage, the number of UV–vis absorption peaks increased under visible light which means increasing absorption. When anodization duration increased, absorption band edge also increased in the visible light region, which means the band gap needed to produce charge transfer transition decreased. Under simulated sunlight and applied voltage of +0.4 V, photocurrent increased with the increase of either anodization voltage or anodization duration, and can be expressed by linear equations. In addition, anodization currents were recorded during anodization. Morphology, crystal structure and photoelectrical properties of anodized titanium sheets were characterized. The anodized titanium sheets can not only be used as decorative material in jewellery and architecture fields etc. but also are supposed to be used as photoelectrical catalyst in further work.

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Laser coloration of titanium films: New development for jewelry and decoration

Cited by 25 publications

References 15 publications

Digital Laser Micropainting for Reprogrammable Optoelectronic Applications

Digital Laser Micropainting for Reprogrammable Optoelectronic Applications

Erasing and rewriting of titanium oxide colour marks using laser-induced reduction/oxidation

Study on the photoelectrical performance of anodized titanium sheets

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