Direct laser writing of barriers with controllable permeability in porous glass

Veiko, Vadim P.; Zakoldaev, R. A.; Sergeev, M. M.; Данилов, П. А.; Kudryashov, S. I.; Костюк, Г К; Sivers, Aleksandr N; Ионин, А. А.; Антропова, Т. В.; Medvedev, Oleg

doi:10.1364/oe.26.028150

Cited by 17 publications

(12 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For high repetition rate multi-pulse laser irradiation, the obtained results depend not only on laser pulse energy, E p , but also on the number of laser pulses per laser spot, N. In this case, it is convenient to use the total incident laser energy, which is defined as follows E L = E p N. Thus, in the present study a series of ultra-short laser PG scanning were performed for two different focusing conditions by varying E L . When E L is small, porous glass densification is proven to take place [15,16,34] (Fig. 2(a).…”

Section: Results Of Multi-pulse Femtosecond Laser Scanningmentioning

confidence: 99%

“…For this, as discussed above, the regime with NA = 0.25 and pulse energy smaller 1µJ are preferable. Even with these parameters, however, to cover 500µm thickness, our recording procedure included two steps: (i) femtosecond laser recording of 4 tracks forming a barrier through the entire depth of the glass plate; and (ii) 2 tracks on the surface of PG written with CO 2 laser radiation for a complete sealing of the barrier [34]. Schematic view and micro-photo are shown in Fig.…”

Section: Toward Efficient Laser Writing Of Barriers In Pgmentioning

confidence: 99%

“…Among various effects of ultra-short laser pulses, their capacity to considerably reduce pore size and induce glass structural modifications are particularly promising since locally densified regions can be used as barriers. Such barriers with controlled permeability were efficiently produced in PG through its local bulk density modification by direct femtosecond laser writing [34]. To further promote ultra-short laser applications such as barrier and integrated device inscription in volume of PGs, it is crucial to better control over both the required shape and morphology of the laser-modified region.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ultra-short laser-induced high aspect ratio densification in porous glass

Itina¹,

Zakoldaev²,

Sergeev³

et al. 2019

Opt. Mater. Express

Self Cite

View full text Add to dashboard Cite

Multiple ultra-short laser irradiation enabling direct writing of high aspect ratio barriers is used for structuring of nanoporous glass. Shape and morphology of laser-modified regions are examined, and high aspect ratio laser-induced material densification is founded. Experimental results are analyzed by modeling describing laser propagation, non-linear ionization and thermal effects. The role of laser focusing, laser energy and pulse number are examined. Several regimes are distinguished. Particularly, high-aspect ratio densified zones are obtained for the numerical aperture of 0.25, whereas either more symmetric densified regions or spherical cavities are shown to be formed for numerical aperture of 0.4. The resulting laser irradiation conditions required for deep and prolonged densification are explained by a lower ionization rate, leading to the under-critical free electron plasma density, longer filamentation and pulse-to-pulse elongation effects. Furthermore, filling of the porous glass with water is demonstrated to particularly extend the length of the densified region in depth. The presented study provides insights facilitating laser-based fabrication of barriers, membrane and patterns suitable for the environmental gas-phase analysis.

show abstract

Section: Results Of Multi-pulse Femtosecond Laser Scanningmentioning

confidence: 99%

Section: Toward Efficient Laser Writing Of Barriers In Pgmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ultra-short laser-induced high aspect ratio densification in porous glass

Itina¹,

Zakoldaev²,

Sergeev³

et al. 2019

Opt. Mater. Express

Self Cite

View full text Add to dashboard Cite

show abstract

“…PGs can be filled in with different substances, including metal nanoparticles or nanostructures, and/or exposed to laser radiation to ensure their application in optics, microelectronics, microfluidics, sensorics, solar engineering, ecology, etc. (see [26][27][28][29][30][31][32] and the reviews in them).One of the main advantages of PG materials is their transparency in the visible range of the optical spectrum [33]. This property can be successfully used in various applications related to laser methods, for example, the method of laser-induced chemical liquid-phase deposition of metals from solution on the surface of different dielectrics (LCLD) [34].…”

mentioning

confidence: 99%

mentioning

confidence: 99%

Glass/Au Composite Membranes with Gold Nanoparticles Synthesized inside Pores for Selective Ion Transport

Лебедев¹,

Novomlinsky²,

Kochemirovsky³

et al. 2020

Materials

View full text Add to dashboard Cite

4Grebenshchikov Institute of Silicate Chemistry (ISCh) RAS, 2 Adm. Makarova emb., St Petersburg 199155, Russia; anfimova-i@mail.ru (I.A.); antr2@yandex.ru (T.A.) Abstract: Nanocomposite membranes have been actively developed in the last decade. The involvement of nanostructures can improve the permeability, selectivity, and anti-fouling properties of a membrane for improved filtration processes. In this work, we propose a novel type of ion-selective Glass/Au composite membrane based on porous glass (PG), which combines the advantages of porous media and promising selective properties. The latter are achieved by depositing gold nanoparticles into the membrane pores by the laser-induced liquid phase chemical deposition technique. Inside the pores, gold nanoparticles with an average diameter 25 nm were formed, which was confirmed by optical and microscopic studies. To study the transport and selective properties of the PG/Au composite membrane, the potentiometric method was applied. The uniform potential model was used to determine the surface charge from the experimental data. It was found that the formation of gold nanoparticles inside membrane pores leads to an increase in the surface charge from −2.75 mC/m 2 to −5.42 mC/m 2 . The methods proposed in this work allow the creation of a whole family of composite materials based on porous glasses. In this case, conceptually, the synthesis of these materials will differ only in the selection of initial precursors.Nanocomposite membranes have been actively developed in the last decade [17]. The involvement of nanostructures can improve the permeability, selectivity, and anti-fouling properties of a membrane for improved filtration processes. One of the most promising approaches to producing such composite materials is the formation of nanoparticles inside the porous structure of a membrane. As with nanotechnology in general [18], there are two main methods [17] for the formation of nanoparticles inside the membranous pores: "top down"-bulk modification through blending (called mixed-matrix membranes) and "bottom up"-surface modification. In the fabrication of bulk-modified nanocomposite membranes, the nanoparticles are dispersed in a homogeneous polymeric precursor solution before the final formation process [19]. However, this method is difficult to use, for example, in the synthesis of inorganic solid membranes. The surface modification technique is the most convenient method in this case [11]. The surface modification technique deals with deposition of nanoparticles onto a membrane.Silicate (high silica) porous glasses (PGs) are channel-type nanostructures [20] with thermal, chemical and microbiological stability, in combination with controlled surface structural characteristics [21][22][23]. Special attention is worth paying to the PG application for the separation of liquid mixtures by reverse osmosis. This method has found application in water desalination, sanitary household water cleaning, water regeneration from vital function products in space, radioactive ...

show abstract