Erasable and rewritable laser-induced gratings on silver phosphate glass

Konidakis, Ioannis; Skoulas, Evangelos; Papadopoulos, Antonis; Serpetzoglou, Efthymis; Margariti, Elena; Stratakis, Emmanuel

doi:10.1007/s00339-018-2267-0

Cited by 8 publications

(6 citation statements)

References 42 publications

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“…Since the electrical properties of both phases are very different, the structures can be used to introduce anisotropy in the electrical conductivity. Finally, the fabrication of high regular, erasable and rewritable periodic surface patterns on silver metaphosphate glass by means of ultrashort pulsed laser processing, has been reported [341] which could potentially lead to ultrafast laser data storage on soft glass surfaces.…”

Section: Biology/medicine A) Cell Growth Migration Patterningmentioning

confidence: 99%

Laser engineering of biomimetic surfaces

Stratakis

Bonse

Heitz

et al. 2020

Materials Science and Engineering: R: Reports

216

143

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The exciting properties of micro-and nano-patterned surfaces found in natural species hide a virtually endless potential of technological ideas, opening new opportunities for innovation and exploitation in materials science and engineering. Due to the diversity of biomimetic surface functionalities, inspirations from natural surfaces are interesting for a broad range of applications in engineering, including phenomena of adhesion, friction, wear, lubrication, wetting phenomena, self-cleaning, antifouling, antibacterial phenomena, thermoregulation and optics. Lasers are increasingly proving to be promising tools for the precise and controlled structuring of materials at micro-and nano-scales. When ultrashort-pulsed lasers are used, the optimal interplay between laser and material parameters enables structuring down to the nanometer scale. Besides this, a unique aspect of laser processing technology is the possibility for material modifications at multiple (hierarchical) length scales, leading to the complex biomimetic micro-and nano-scale patterns, while adding a new dimension to structure optimization. This article reviews the current state of the art of laser processing methodologies, which are being used for the fabrication of bioinspired artificial surfaces to realize extraordinary wetting, optical, mechanical, and biological-active properties for numerous applications. The innovative aspect of laser functionalized biomimetic surfaces for a wide variety of current and future applications is particularly demonstrated and discussed. The article concludes with illustrating the wealth of arising possibilities and the number of new laser micro/nano fabrication approaches for obtaining complex high-resolution features, which prescribe a future where control of structures and subsequent functionalities are beyond our current imagination.

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Section: Biology/medicine A) Cell Growth Migration Patterningmentioning

confidence: 99%

Laser engineering of biomimetic surfaces

Stratakis

Bonse

Heitz

et al. 2020

Materials Science and Engineering: R: Reports

216

143

View full text Add to dashboard Cite

show abstract

“…Transient absorption spectroscopy (TAS) is a powerful technique and a figure-of-merit method to explore ultrafast phenomena and relaxation processes that take place within a wide range of materials. For instance, it is widely used for studying components of photovoltaic devices [31][32][33], 2D materials [34,35], inorganic glasses [36], and single-walled carbon nanotubes wrapped with polymers [37][38][39][40]. For energy conversion materials, in particular, TAS provides important insights on the excitation dynamics and free charge carrier lifetimes, which are crucial for the efficiency of energy conversion processes.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-Doped Carbon Nanotube/Polypropylene Composites with Negative Seebeck Coefficient

et al. 2020

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This study describes the application of multi-walled carbon nanotubes that were nitrogen-doped during their synthesis (N-MWCNTs) in melt-mixed polypropylene (PP) composites. Different types of N-MWCNTs, synthesized using different methods, were used and compared. Four of the five MWCNT grades showed negative Seebeck coefficients (S), indicating n-type charge carrier behavior. All prepared composites (with a concentration between 2 and 7.5 wt% N-MWCNTs) also showed negative S values, which in most cases had a higher negative value than the corresponding nanotubes. The S values achieved were between 1.0 μV/K and −13.8 μV/K for the N-MWCNT buckypapers or powders and between −4.7 μV/K and −22.8 μV/K for the corresponding composites. With a higher content of N-MWCNTs, the increase in electrical conductivity led to increasing values of the power factor (PF) despite the unstable behavior of the Seebeck coefficient. The highest power factor was achieved with 4 wt% N-MWCNT, where a suitable combination of high electrical conductivity and acceptable Seebeck coefficient led to a PF value of 6.1 × 10−3 µW/(m·K2). First experiments have shown that transient absorption spectroscopy (TAS) is a useful tool to study the carrier transfer process in CNTs in composites and to correlate it with the Seebeck coefficient.

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“…The presence of AgNPs within silver-based phosphate glasses has been demonstrated previously in some of our previous studies. , In particular, following post-melting femtosecond (fs) laser treatment of the AgPO 3 glass for the formation of periodic patterns on the surface, the formation of AgNPs was noticed due to the local heat transfer to the glass surface . Likewise, the presence of AgNPs was utilized for the formation of two-dimensional (2D) materials nano-heterojunctions upon incorporating few layers of MoS 2 within the AgPO 3 glass .…”

Section: Resultsmentioning

confidence: 99%

Phosphate Glass Microspheres with Silver Nanoparticles for Whispering Gallery Mode Resonators

Dragosli,

Konidakis,

Stratakis

2024

ACS Appl. Nano Mater.

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Glass microspheres have gained significant attention over the years in the field of photonics due to their application in whispering gallery mode (WGM) microresonator platforms. However, the synthesis of glass spheres in the micro regime remains challenging, while it relies mostly on complicated synthetic methods or sol–gel chemistry. Herein, we demonstrate the controlled formation of phosphate glass microspheres by means of a simple, fast, low-temperature, post-glass melting thermal treatment of previously quenched glass. Moreover, we report on the simultaneous formation of silver nanoparticles (AgNPs) on the surface of glass spheres upon the same treatment. The formation of metal nanoparticles onto the glass spheres induces attractive optical and plasmonic properties, believed to be suitable for WGM resonator-based applications, as well as a wide range of optoelectronic, photonic, and sensing applications.

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Erasable and rewritable laser-induced gratings on silver phosphate glass

Cited by 8 publications

References 42 publications

Laser engineering of biomimetic surfaces

Laser engineering of biomimetic surfaces

Nitrogen-Doped Carbon Nanotube/Polypropylene Composites with Negative Seebeck Coefficient

Phosphate Glass Microspheres with Silver Nanoparticles for Whispering Gallery Mode Resonators

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