Article
Multidisciplinary Sciences
Woo Young Kim, Bo Wook Seo, Sang Hoon Lee, Tae Gyung Lee, Sin Kwon, Won Seok Chang, Sang-Hoon Nam, Nicholas X. Fang, Seok Kim, Young Tae Cho
Summary: A challenge in making a flexible mold stamp using roll-to-roll nanoimprint lithography is to increase area while minimizing perceptible seams. A method that enables the fabrication of scalable, quasi-seamless functional surfaces without the use of alignment marks is proposed. This method is capable of fabricating scalable functional surfaces and imprint molds with quasi-seamless and alignment mark-free patterning.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Jisun Lee, Seong Jun Park, Seung Chul Han, Prem Prabhakaran, Cheol Woo Ha
Summary: In this study, a double-step laser scanning method is proposed as a reliable high-yield TPS process to reduce the delamination effect in two-photon lithography (TPL). The method involves polymerizing the initial interfacial layer between structures and substrate twice, inducing strong crosslinking in the polymer to prevent swelling and delamination. The effectiveness of the method is demonstrated with large-scale microlens arrays, showing a significant improvement in process yield.
MATERIALS & DESIGN
(2023)
Article
Engineering, Multidisciplinary
Hao Huang, Minghui Guo, Congyi Wu, Youmin Rong, Yu Huang, Guojun Zhang
Summary: By establishing a lattice Boltzmann method (LBM) model, we investigate the effects of nanostructure geometry on wettability and optimize the geometry to achieve a superhydrophobic surface. The LBM model accurately reproduces contact angles and provides insights into the wettability mechanism.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2023)
Article
Engineering, Manufacturing
Hansong Chen, Zongbao Shen, Pin Li, Lei Zhang
Summary: A new type of two-step overlapping laser shock path is introduced to achieve uniform multiscale microtexture. It is found that the proposed overlapping laser shock scanning path can improve the uniformity of the microtextures and refine the grain size on the treated sample surfaces. The mechanical properties are improved, and the surfaces with multiscale microtextures exhibit better corrosion resistance.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Chemistry, Multidisciplinary
Omar Tricinci, Francesca Pignatelli, Virgilio Mattoli
Summary: Bioinspired functional surfaces, such as the Salvinia-effect, show remarkable properties in wettability and drag force reduction. By combining 3D laser lithography and microfabrication techniques, surfaces inspired by the morphology and chemical coating of Salvinia Molesta leaves are created. These surfaces exhibit super-hydrophobicity, tunable adhesion, and remarkable underwater air retention capability. In hydrodynamic conditions, they also demonstrate significant drag force reduction and energy savings of up to 40%.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Wenhao Zhang, Xiqi Wu, Liang Li, Chongwen Zou, Yuhang Chen
Summary: This study demonstrates a precise etching strategy for VO2 by direct writing on a VO2 film and subsequent sonication removal. The results show that VO2 can be etched layer by layer via alternately repeating tip modulation and sonication, and arbitrary patterns can be written. Based on this method, a metasurface with spectrally selective tunable reflectivity in near-and mid-infrared was designed. The electric-field scanning probe lithography method offers high resolution, quasi-3D patterning, and resist-free maskless direct writing, which can be applied for prototyping other micro/nanodevices.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Jeong-Sik Jo, Jihoon Choi, Seung-Hoon Lee, Changhoon Song, Heeso Noh, Jae-Won Jang
Summary: The mass fabrication of 3D silicon microstructures with a 100 nm resolution is achieved using scanning probe lithography combined with metal-assisted chemical etching. Various protruding and recessed silicon structures are obtained via different lithography methods, demonstrating applications in nanoimprinting and PDMS stamps. Mass production of arbitrarily shaped silicon microparticles at submicrometer resolution is developed using silicon-on-insulator substrates, with applications in optical microresonators, surface-enhanced Raman scattering templates, and smart microparticles for fluorescence signal coding.
Article
Chemistry, Physical
Cezhi Du, Huilu Yuan, Xinna Zhu, Tao Zhang, Zhihua Liu, Chengyong Wang
Summary: Zirconium-based bulk metallic glasses (Zr-BMGs) with biomimetic structures were created using femtosecond laser, and their antifouling and antibacterial properties were evaluated. The results showed that the rice leaf-like and butterfly wing-like structures had the best antifouling effect, while the shark skin-like structure exhibited the highest bactericidal performance. Crystallization was observed on the surfaces with laser energy intensities greater than 2.38 J/mm2, but the substrate remained amorphous. The Nepenthes-like structure with disordered nano bulges showed the best balance between antifouling, bactericidal, and biocompatibility. These laser fabricated biomimetic structures can enhance the antibacterial activity of Zr-BMG medical devices, thereby improving medical treatment quality.
SURFACES AND INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Seong Min Kang, Joon Hyung An
Summary: A rational design and fabrication method is proposed for fabricating polymeric directional droplet sliding surfaces inspired by butterfly wing microline arrays. The bioinspired surfaces are fabricated using a simple and well-designed process that combines the conventional micro-electromechanical system process with subsequent soft lithography. The study shows that the fabricated bioinspired surfaces with re-entrant shape line structure exhibit directional omniphobic properties while maintaining transparency. This research has implications for the development of artificial surfaces inspired by nature for various fields, including microfluidics, biotechnology, and energy-harvesting devices.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Engineering, Electrical & Electronic
Jaime Marco-Rider, Andrej Cibicik, Olav Egeland
Summary: In this paper, a novel method for extracting laser lines from images with a polarization image sensor is proposed. The method includes preprocessing, optimization, and laser line extraction steps, and its performance is experimentally validated.
IEEE SENSORS JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Tanweepriya Das, James D. Smith, Md Hemayet Uddin, Raymond R. Dagastine
Summary: The size, shape, and chemical properties of nanoparticles play an important role in modulating the properties of particle suspensions. This study introduces a novel pathway to produce monodispersed anisotropic nano- and microparticles with different shapes and materials. Compared to existing methods, this nanolithographic method is fast, easy to prototype, and mechanically simple. The combination of thermal scanning probe lithography and dry reactive ion etching allows for the fabrication of two-dimensional and three-dimensional templates, which can be used to deposit different metal/metal oxides and create a range of nanomaterials. The developed method shows great reproducibility, flexibility, and control over the shape and size of monodispersed anisotropic nanoparticles.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Optics
Angel Rodriguez, Ana J. Lopez, Javier Lamas, Alicia Moreno, Alberto Ramil
Summary: The paper presents a robot-assisted laser cleaning system that can automatically process 3D objects with any geometry. The system integrates a femtosecond pulse laser, a 6 DOF robotic arm, and a laser profilometer to capture the geometry of the workpiece. It performs an automatic procedure to generate cleaning paths and accurately targets each point on the surface. Experimental results demonstrate the improved efficiency of automatic laser cleaning with this system.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Chemistry, Applied
Jiaxin Zheng, Ri Liu, Dongdong Liu, Zhankun Weng, Guicai Song, Wenjun Li, Zuobin Wang
Summary: In this study, micro-groove structures were fabricated on SLIPS substrates using direct laser interference lithography (DLIL), and lubricant oil was coated to convert them into DLIL-SLIPS with excellent anti-icing and friction-reduction properties. The DLIL-SLIPS demonstrated improved ice adhesion property and reduced coefficient of friction, making it suitable for anti-icing and friction-reduction applications in extreme environments such as bearings and turbine blades.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Chemistry, Analytical
Noah Hurley, Steve Kamau, Jingbiao Cui, Yuankun Lin
Summary: This paper investigates the holographic fabrication of 3D moire photonic crystals using an integrated system of a single reflective optical element (ROE) and a spatial light modulator (SLM). By modifying the interfering beams, the interference patterns of 3D moire photonic crystals are systematically simulated and compared with the holographic structures. The holographic fabrication of phase and beam intensity ratio-dependent 3D moire photonic crystals and the discovery of superlattices modulated in the z-direction are reported, providing guidance for future pixel-by-pixel phase engineering in SLM for complex holographic structures.
Article
Physics, Applied
Xiangxian Wang, Tianxu Jia, Jiankai Zhu, Yingwen Su, Liping Zhang, Hua Yang, Zao Yi, Yunping Qi
Summary: This study systematically investigated the influence of polarization angle on the fabrication of micro-structures using multi-beam laser interference lithography. Different polarization combinations were studied and found to affect the interference patterns, contrasts, and periods of the micro-structures. The discussed methods are simple, low cost, and provide excellent control over structural parameters, making them useful for the micro-structure manufacturing industry.
MODERN PHYSICS LETTERS B
(2021)
Review
Engineering, Biomedical
Shantanu Pradhan, Omar A. Banda, Cindy J. Farino, John L. Sperduto, Keely A. Keller, Ryan Taitano, John H. Slater
ADVANCED HEALTHCARE MATERIALS
(2020)
Review
Biochemical Research Methods
Asli Z. Unal, Jennifer L. West
BIOCONJUGATE CHEMISTRY
(2020)
Article
Biochemical Research Methods
Joshua A. Hammer, Jennifer L. West
BIOCONJUGATE CHEMISTRY
(2020)
Article
Engineering, Biomedical
Cindy J. Farino Reyes, Shantanu Pradhan, John H. Slater
Summary: The study investigates the role of hydrogel properties in regulating the phenotype of triple negative metastatic breast cancer using different cell lines and hydrogel formulations. The results show that hydrogels with varying adhesivity and degradability have different effects on cell growth, dormancy, and other metrics. These findings demonstrate that ECM properties and organ-tropism synergistically regulate cancer cell phenotype and dormancy.
ADVANCED HEALTHCARE MATERIALS
(2021)
Article
Biochemical Research Methods
Ian S. Kinstlinger, Gisele A. Calderon, Madison K. Royse, A. Kristen Means, Bagrat Grigoryan, Jordan S. Miller
Summary: The research describes how to fabricate and assemble customizable open-source tissue perfusion chambers, and successfully catheterize tissue constructs; endothelial cells are seeded along the luminal surfaces of the tissue constructs and connected to fluid pumping equipment; enabling various experimental designs, the protocol is expected to promote the adoption and standardization of perfusion tissue culture methods.
Article
Chemistry, Multidisciplinary
Lisa R. Volpatti, Rachel P. Wallace, Shijie Cao, Michal M. Raczy, Ruyi Wang, Laura T. Gray, Aaron T. Alpar, Priscilla S. Briquez, Nikolaos Mitrousis, Tiffany M. Marchell, Maria Stella Sasso, Mindy Nguyen, Aslan Mansurov, Erica Budina, Ani Solanki, Elyse A. Watkins, Mathew R. Schnorenberg, Andrew C. Tremain, Joseph W. Reda, Vlad Nicolaescu, Kevin Furlong, Steve Dvorkin, Shann S. Yu, Balaji Manicassamy, James L. LaBelle, Matthew Tirrell, Glenn Randall, Marcin Kwissa, Melody A. Swartz, Jeffrey A. Hubbell
Summary: The study found that decorating multiple copies of the SARS-CoV-2 spike protein receptor-binding domain (RBD) on the surface of polymersomes can promote a potent neutralizing antibody response. Both RBDsurf and RBDencap induce robust T cell immune responses, producing multiple Th1-type cytokines.
ACS CENTRAL SCIENCE
(2021)
Editorial Material
Engineering, Biomedical
Tim B. F. Woodfield, Lorenzo Moroni, Jordan S. Miller
APL BIOENGINEERING
(2021)
Article
Engineering, Biomedical
Laura T. Gray, Michal M. Raczy, Priscilla S. Briquez, Tiffany M. Marchell, Aaron T. Alpar, Rachel P. Wallace, Lisa R. Volpatti, Maria Stella Sasso, Shijie Cao, Mindy Nguyen, Aslan Mansurov, Erica Budina, Elyse A. Watkins, Ani Solanki, Nikolaos Mitrousis, Joseph W. Reda, Shann S. Yu, Andrew C. Tremain, Ruyi Wang, Vlad Nicolaescu, Kevin Furlong, Steve Dvorkin, Balaji Manicassamy, Glenn Randall, D. Scott Wilson, Marcin Kwissa, Melody A. Swartz, Jeffrey A. Hubbell
Summary: Spike-p(Man-TLR7) vaccination induces robust antigen-specific cellular and humoral responses in mice, generating high and long-lasting titers of antibodies with neutralizing abilities surpassing convalescent human serum. The vaccine also enhances germinal center B cells, antigen-specific antibody secreting cells, activated T follicular helper cells, and polyfunctional Th1-cytokine producing CD4(+) and CD8(+) T cells.
Article
Materials Science, Biomaterials
Rachel Chapla, Joshua A. Hammer, Jennifer L. West
Summary: This study developed a genetically encoded method for reversible biochemical signaling to accurately model tissue regeneration. By connecting specific proteins and peptides, reversible adhesion between cells and matrices can be achieved to mimic tissue processes. This system is significant for studying tissue behavior and improving therapeutic outcomes.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2022)
Article
Instruments & Instrumentation
Shann S. Yu, Jeffrey A. Hubbell, Melody A. Swartz
Summary: Immunotherapies aim to treat diseases by modulating immune cell activity, but transport barriers may hinder delivery and retention at diseased sites. Overcoming these barriers by exploiting immunobiology to engineer molecular and cellular approaches is crucial. Integrating expertise from pathologists, clinicians, immunologists, biophysicists, immunoengineers and more is essential for impactful and practical solutions across various diseases.
DRUG DELIVERY AND TRANSLATIONAL RESEARCH
(2021)
Article
Oncology
Rachel R. Katz, Jennifer L. West
Summary: The tumor microenvironment (TME) plays a crucial role in tumor progression and drug resistance. In vitro models that can replicate the cell-cell and cell-matrix interactions in situ are essential for studying tumor behavior and selecting effective drugs. While naturally derived polymers can maintain the dimensionality of the native TME, they lack tunability and batch-to-batch consistency. Therefore, synthetic polymer systems have been widely used to create physiologically relevant TME cultures. In this review, we discuss the current state and future directions of tumor microenvironment models in synthetic hydrogels.
Article
Materials Science, Biomaterials
Cindy J. Farino Reyes, John H. Slater
Summary: In this study, the authors investigate how the matrix properties of premetastatic niches affect the behavior of breast cancer cells. They find that different levels of adhesivity and degradability can induce growth, dormancy, and reactivation of cancer cells. Complete removal of adhesivity causes cells to enter dormancy, while increasing adhesivity can reactivate dormant cells. This research provides important insights into the role of the microenvironment in tumor cell fate before metastasis.
Article
Materials Science, Biomaterials
Rachel R. Katz, Jennifer L. West
Summary: Increased extracellular matrix (ECM) density in the tumor microenvironment influences tumor progression, and the effect varies between different tumor cell lines of epithelial and mesenchymal origin. Epithelial origin cell line proliferates more and forms more mature focal complexes in response to an increase in matrix adhesion sites, while mesenchymal origin cell line proliferates more in 2D culture but less in 3D culture, invades less, and forms more mature focal complexes in response to an increase in matrix stiffness.
Article
Nanoscience & Nanotechnology
Z. Fereshteh, M. N. Dang, C. Wenck, E. S. Day, J. H. Slater
Summary: This study investigated the efficacy of inhibiting cancer cell binding to human lung microvascular endothelial cells (HMVEC-Ls) via antibody blocking of E-selectin using antibody-functionalized gold nanoshells (NS). The results demonstrated that E-selectin-targeted NS reduced the binding of MDA-MB-231 cancer cells to HMVEC-Ls by up to 41%, suggesting the potential of these conjugates in inhibiting cancer cell extravasation during metastasis.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Cindy J. Farino, Shantanu Pradhan, John H. Slater
ACS APPLIED BIO MATERIALS
(2020)