Article
Chemistry, Physical
S. O. Gurbatov, Yu. M. Borodaenko, E. V. Mitsai, E. Modin, A. Yu. Zhizhchenko, A. B. Cherepakhin, A. V. Shevlyagin, S. A. Syubaev, A. P. Porfirev, S. N. Khonina, A. P. Yelisseyev, S. I. Lobanov, L. I. Isaenko, E. L. Gurevich, A. A. Kuchmizhak
Summary: This study reveals the formation of regular laser-induced periodic surface structures (LIPSSs) in GaSe crystals through laser-driven self-organization. The ability to control the local periodicity of LIPSSs enables multilevel structural color marking on the crystal surface.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Analytical
Shunping Li, Xinchang Wang, Guojie Chen, Zhongke Wang
Summary: Laser ablation of semiconductor silicon has been extensively studied. In ultrashort pulse domain, the threshold for pulse energy fluence in silicon ablation strongly depends on the pulse width. However, the energy fluence threshold dependence on pulse width in the nanosecond pulse scale is not well understood. This study elucidates the interaction energy dependency on pulse width in ns NIR laser ablation of silicon.
Article
Chemistry, Physical
Zhao-Chi Chen, Tien-Li Chang, Qi-Xuan Wu, Cheng-Che Liu, Hung-Chih Chen, Chih-Heng Huang
Summary: By controlling the laser fluence, the surface roughness and ripple characteristics of chromium-Ti nitride thin films can be effectively modified, thereby improving the mechanical and electrochemical properties and enhancing the proliferation and viability of cells. This method provides an alternative approach for cell culture on surfaces with periodic microstructures or nanostructures.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Multidisciplinary Sciences
Martin Heinrich, Bogdan Voisiat, Andres Fabian Lasagni, Ruediger Schwarze
Summary: Surface structuring using nano-second lasers can enhance properties of materials or create new ones. Direct laser interference patterning with different polarization vector orientations efficiently produces these structures. However, experimental measurement of the fabrication process is challenging due to small scales. A numerical model is developed to predict the resolidified surface structures and shows good agreement with experimental data in terms of shape and dimensions. This model provides valuable insight into velocity and temperature during structure formation and can be used for predicting surface structures based on different process parameters in the future.
Article
Optics
Bing Dong, Zongwei Xu, Changkun Shi, Kun Zhang, Yuheng Zhang, Rushuai Hua, Wei Zhao, Jianshi Wang
Summary: In this study, a method for fabricating high-quality micro-nanostructures of 4H-SiC using vector polarized light was proposed. The influences of linear polarization and vector polarization on the quality and surface morphology of processed SiC microgrooves were studied. The study showed that using vector beam, especially azimuthal polarization beam, can ensure the uniformity of the processing area, reduce micro-cracks and obtain better processing quality.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Xinpeng Du, Xiaoming Yu
Summary: A mathematical model is developed to predict the maximum speed of a focused laser beam in cutting thin materials. The model, based on only two material parameters, establishes an explicit relationship between cutting speed and laser parameters. It reveals that there is an optimal focal spot radius, leading to maximized cutting speed for a given laser power. Comparison between modeling results and experiments, after correcting laser fluence, shows good agreement. This study is significant for the practical application of lasers in processing thin materials such as sheets and panels.
Article
Optics
Taek Yong Hwang, Jongweon Cho, Yong-Dae Kim, Tae Hoon Park, Jung Eon Son, Jeongjin Kang, Byounghwak Lee
Summary: In this study, the optical authentication capabilities of structurally colorized images on metal surfaces fabricated by controlling the orientation of femtosecond LSFLs were investigated using fine-tuning of the lightweight convolutional neural network MobileNetV1. The research shows that the combination of variations in structural color due to a broad range of illumination incident angles, controlled orientations of LSFLs, and differences in features captured in the image make this system suitable for deep learning-based optical authentication.
Article
Optics
Taek Yong Hwang, Jongweon Cho, Yong-Dae Kim, Tae Hoon Park, Jung Eon Son, Jeongjin Kang, Byounghwak Lee
Summary: In this study, we use deep learning algorithms to investigate the optical authentication capabilities of structurally colorized images on metal surfaces fabricated by controlling the orientation of LSFLs. The results show that the structural color variations and differences in features captured in the image, combined with a broad range of illumination incident angles, make this system suitable for deep learning-based optical authentication.
Article
Chemistry, Physical
Matej Senegacnik, Peter Gregorcic
Summary: We propose a method for fabricating curved, meandering grooves with submicrometer spacing by laser irradiation in liquid, using cavitation bubbles as diffraction objects to spatially modulate the intensity distribution of the beam. The bubbles are manipulated with thermooptical tweezers by thermocapillary forces, allowing the generation of regular arc-shaped concentric microgroove channels. This study demonstrates the potential of using cavitation bubbles as a useful tool in laser ablation in liquids.
APPLIED SURFACE SCIENCE
(2023)
Article
Instruments & Instrumentation
Keisuke Takenaka, Masaki Hashida, Hitoshi Sakagami, Shin-ichiro Masuno, Mitsuhiro Kusaba, Shigeru Yamaguchi, Satoru Iwamori, Yuji Sato, Masahiro Tsukamoto
Summary: The Perpendicular Period and Phase Scanning ((PS)-S-3) method is used to evaluate the uniformity of laser-induced periodic surface structures (LIPSS). The study shows that two-color double-pulse irradiation reduces the period dispersion and average phase difference of LIPSS, resulting in a more uniform structure. A 3D electromagnetic particle-in-cell simulation confirms the effectiveness of the (PS)-S-3 method in assessing the uniformity of LIPSS.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Biochemistry & Molecular Biology
Stella Maragkaki, Panagiotis C. Lingos, George D. Tsibidis, George Deligeorgis, Emmanuel Stratakis
Summary: The study explores the impact of laser polarization on pre-patterned surfaces and the formation of periodic structures in different directions, revealing that laser-induced periodic surface structures exhibit different periodic characteristics depending on the polarization direction.
Article
Multidisciplinary Sciences
Marius Navickas, Robertas Grigutis, Vytautas Jukna, Gintaras Tamosauskas, Audrius Dubietis
Summary: This study experimentally investigates the formation and evolution of laser-induced periodic surface structures in fused silica under irradiation of femtosecond pulses. The results show that the structures transform from periodic structures aligned parallel to laser polarization to polarization-independent annular structures with increasing number of pulses.
SCIENTIFIC REPORTS
(2022)
Article
Optics
Haruyuki Sakurai, Kuniaki Konishi
Summary: In this study, the characteristics and potential benefits of wavelength conversion of burst-pulses emitted at the near-infrared to the ultraviolet region via direct third-harmonic generation were explored. The results showed that burst-mode processing significantly reduced surface roughness and debris, resulting in high-quality laser processing with potential for accurate microfabrication.
Article
Chemistry, Multidisciplinary
Kirill Bronnikov, Semyon Gladkikh, Konstantin Okotrub, Andrey Simanchuk, Alexey Zhizhchenko, Aleksandr Kuchmizhak, Alexander Dostovalov
Summary: Research attention has recently focused on highly uniform thermochemical laser-induced periodic surface structures (TLIPSS) due to their practical applicability in fabricating periodic surface morphologies important for surface functionalization, diffraction optics, and sensors. By using different laser processing wavelengths and ambient environments, control of TLIPSS period and nanoscale morphology of the formed protrusions can be achieved.
Article
Optics
Marie -Pier Lord, Michel Olivier, Martin Bernier, Real Vallee
Summary: Femtosecond fiber lasers have been a game changer in laser technology industry, providing high brightness ultrashort pulses in compact, affordable, and reliable setups. This study presents the first femtosecond fiber laser operating in the visible spectrum, expanding the range of applications for such sources. The all-normal dispersion regime passively mode-locked ring cavity is based on nonlinear polarization evolution in a single-mode Pr3+-doped fluoride fiber. The compressed pulses at 635 nm have a duration of 168 fs, a peak power of 0.73 kW, and a repetition rate of 137 MHz.
Article
Materials Science, Multidisciplinary
Cesar B. Morales-Ramos, Marco Camacho-Lopez, Miguel A. Camacho-Lopez, Alfredo R. Vilchis-Nestor, Mariela Flores-Castaneda, Santiago Camacho-Lopez
Summary: Delta-Bi2O3 nanoparticles were successfully synthesized using the laser ablation of solids in liquids (LASL) technique, with a bismuth target irradiated by a ns-pulsed Nd:YAG laser in sodium hypochlorite solution. This method proved to be suitable and simple for obtaining delta-Bi2O3.
Article
Optics
Noe Enriquez-Sanchez, Alfredo R. Vilchis-Nestor, Santiago Camacho-Lopez, Miguel A. Camacho-Lopez, Marco Camacho-Lopez
Summary: In this study, MnOx NPs/C nanosheets composite colloidal suspensions were synthesized by laser ablation in liquids technique. The composite consisted of manganese oxide nanoparticles embedded in carbon nanosheets. Photoluminescence studies revealed that the carbon nanosheets exhibited significantly enhanced PL when combined with MnOx NPs in the composite. Additionally, the MnOx NPs provided intense UV emission to the composite, suggesting potential applications in optoelectronics and biomedicine.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
R. D. Avila-Aviles, M. A. Camacho-Lopez, I. G. Becerril-Juarez, E. Castro-Longoria, A. R. Vilchis-Nestor
Summary: Silver nanoparticles (AgNPs) synthesized using plant extracts exhibit significant differences in morphology and polydispersity, with aqueous extracts producing various nanostructures and methanol/isopropanol extracts mainly yielding spheroids. Different Raman signals of amplification were obtained depending on the laser, with better results observed using nanoparticles synthesized with aqueous and isopropanol extracts.
Article
Computer Science, Interdisciplinary Applications
Mildred S. Cano-Velazquez, Jose Bon, M. Llamazares, Santiago Camacho-Lopez, Guillermo Aguilar, Juan Hernandez-Cordero, Macarena Trujillo
Summary: This study explores the photothermal effects of transparent nanocrystalline yttria-stabilized zirconia (nc-YSZ) ceramics when irradiated with laser. Both experimental and computational models show that the temperatures achieved during laser irradiation are suitable for biomedical applications. The absorption coefficient of the nc-YSZ samples is identified as the most influential parameter.
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
(2022)
Article
Chemistry, Physical
Juan Carlos Gonzalez-Parra, Vicente Robles, Luis Felipe Devia-Cruz, Rene Rodriguez-Beltran, Natanael Cuando-Espitia, Santiago Camacho-Lopez, Guillermo Aguilar
Summary: By nanotexturing a metallic surface using Laser-Induced Periodical Surface Structures (LIPSS), the eroded volume caused by laser-induced cavitation erosion can be significantly reduced. The eroded volume on the LIPSS-scribed surface is more than three times smaller than that on the untreated surface. The lower quantity of remnant bubbles attached to the LIPSS-modified surface between cavitation events is the main reason for the significant difference in eroded volume.
SURFACES AND INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
M. Camacho-Lopez, M. Ballesteros-Balbuena, A. Esparza-Garcia, M. Flores-Castaneda, S. Camacho-Lopez, M. A. Camacho-Lopez
Summary: This study focuses on the phase transition from bismuth to β-Bi2O3 by gradually heating the bismuth film. The results show that by carrying out the oxidation process at a low temperature, pristine bismuth can be transformed into β-Bi2O3. The transformation was characterized using various techniques, and the method shows feasibility and simplicity for the synthesis of β-Bi2O3.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Anatomy & Morphology
Alejandra Loyola-Leyva, Juan Pablo Loyola-Rodriguez, Simon Barquera, Francisco Javier Gonzalez, Santiago Camacho-Lopez, Yolanda Teran-Figueroa
Summary: The alterations in erythrocyte size and shape caused by dietary patterns were assessed using SEM and AFM. Unhealthy dietary patterns were found to be associated with changes in erythrocyte size and shape, while healthy dietary patterns were associated with normal erythrocyte size and shape.
MICROSCOPY RESEARCH AND TECHNIQUE
(2022)
Article
Chemistry, Physical
Paulina Segovia-Olvera, Lamborghini Sotelo, Yasmin Esqueda-Barron, Marcos Plata, Noel Ramos, Santiago Camacho-Lopez
Summary: This study investigates the effect of laser beam scanning velocity and overlap on the large-area fabrication of Laser-Induced Periodic Surface Structures (LIPSS) on 400 nm thickness titanium films. The results show that the chemical composition, spatial period, and depth of the LIPSS are significantly influenced by the laser-beam scanning velocity and overlap.
APPLIED SURFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
M. Flores Castaneda, S. Camacho-Lopez, V. H. Castrejon-Sanchez, C. B. Morales-Ramos, M. Camacho-Lopez
Summary: The oxidation process of bismuth colloidal nanoparticles at room temperature was investigated, which were synthesized in deionized water by laser ablation of solids in liquids technique (LASL) and oxidized using NaClO solutions at different concentrations. The oxidized nanomaterials were characterized by various techniques. The results showed morphological changes from small nanoparticles to nanosheets and a mixture of nanosheets with hollow nanoparticles. Two kinds of nanomaterials were found depending on the NaClO solution concentration: Bi2O2CO3 single phase and a mixture of delta-Bi2O3 and Bi2O2CO3. Some samples exhibited good performance as photocatalysts for the degradation of methylene blue in solution. This is the first study to explore the oxidation process of bismuth colloidal nanoparticles at room temperature.
Article
Optics
Mariela Flores-Castaneda, Santiago Camacho-Lopez
Summary: Bi2O2CO3 nanosheets were synthesized by aging of bismuth nanoparticles obtained via laser ablation in liquids, and their decoration with silicon nanoparticles was achieved using the same synthesis technique, for the first time. The size and morphology of the nanosheets were studied using scanning electron microscopy and transmission electron microscopy. Chemical composition was determined by Raman microspectroscopy, and the optical properties were characterized by UV-vis spectroscopy.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Santiago Camacho-Lopez, Mariela Flores-Castaneda, Miguel Camacho-Segura, Luis F. Devia-Cruz, Noe Zamora-Romero, Guillermo Aguilar, Miguel A. Camacho-Lopez, Marco Camacho-Lopez
Summary: This study investigates the synthesis and characterization of molybdenum oxide nanostructures using laser ablation of solids in liquids method. Both nanoparticles and nanosheets composed of molybdenum oxide were formed. The colloid suspension optical absorbance changes with time, resulting in a blue shift within a few days of aging. Raman characterization showed that the material turns into a hydrated molybdenum oxide. Transmission electron microscopy revealed a core-shell structure for the nanoparticles and the nanosheets were found to be composed of orthorhombic alpha-MoO3. The absorption band at 830 nm that develops in the early aging stage of the colloid shows potential for photothermal therapy.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Y. Rodriguez-Lazcano, Enue Barrios-Salgado, Mariela Flores-Castaneda, Santiago Camacho-Lopez, J. Perez-Alvarez, A. Chavez-Chavez, J. G. Quinones-Galvan
Summary: Cu nanoparticles obtained by laser ablation of solids in liquids were added to chemical bath solutions to synthesize Sb2S3-Cu nanocomposite thin films. The films were annealed at 280 °C in Argon and their structural, optical, and surface properties were analyzed. The presence of Cu nanoparticles embedded within Sb2S3 was confirmed by TEM measurements. The electrical resistance of the films was studied using electrochemical impedance spectroscopy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Luis Humberto Robledo-Taboada, Javier Francisco Jimenez-Jarquin, Mariela Flores-Castaneda, Antonio Mendez-Blas, Jacob Barranco-Cisneros, Santiago Camacho-Lopez
Summary: Various micron and submicron structures were laser-induced on silicon, including LIPSS, grooves, conical spikes and deep craters. The formed structures strongly depend on laser fluence and pulse number. Characterization using electron scanning microscopy and atomic force microscopy revealed interesting features such as flipping structure orientation and coexistence of multiple structures, which influenced surface wettability.
BULLETIN OF MATERIALS SCIENCE
(2023)
