Article
Nanoscience & Nanotechnology
Verda Saygin, Sean B. Andersson, Keith A. Brown
Summary: This article introduces a novel method for programmable nanopatterning of liquid features at the fg-scale using ultrafast atomic force microscopy probes, spherical tips, and inertial mass sensing. It is found that sphere-tipped ultrafast probes can reliably pattern hundreds of features. Analysis of the changes in vibrational resonance frequency during the process reveals that drift can be removed through systematic correction. The study also shows that the mass of transferred fluid can be modulated by retraction speed and dwell time, and liquid features as small as 6 fg can be patterned and resolved.
Article
Materials Science, Multidisciplinary
Ze-Qi Li, Ping Guo, Yi-Ge Zhou
Summary: Dip-pen nanolithography is a scanning probe lithography technique that can write inks directly on a surface with high resolution. It has enabled a wide range of applications in synthesizing nanomaterials and various other fields over the past two decades.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Chemistry, Multidisciplinary
Eider Berganza, Evgeniy Boltynjuk, George Mathew, Fabio Fernando Vallejo, Roland Groeger, Torsten Scherer, Sylwia Sekula-Neuner, Michael Hirtz
Summary: In this study, a fluid phase phospholipid ink is used as a building block for structuring 2D and 3D metallic structures. Two processes are presented which rely on serum albumin to anchor lipids on the substrate and create stable lipid-based scaffolds for building metallic structures.
Article
Materials Science, Multidisciplinary
Guoqiang Liu, Mingming Rong, Hong Hu, Lina Chen, Zhuang Xie, Zijian Zheng
Summary: Dip-pen nanolithography has been developed to enable microscale 3D printing capability by designing specific ink, and can generate arbitrary 3D structures. This development will arouse interest in fundamental research and practical applications in the field.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Chemistry, Multidisciplinary
Mahmoud Behzadirad, Stephan Mecholdt, John N. Randall, Joshua B. Ballard, James Owen, Ashwin K. Rishinaramangalam, Alexander Reum, Teodor Gotszalk, Daniel F. Feezell, Ivo W. Rangelow, Tito Busani
Summary: This article introduces the use of GaN nanowires as materials for scanning probe lithography and microscopy, with a low-cost fabrication process and the ability to provide sub-10 nm lithography and atomic scale resolution. GaN nanowires perform well in advanced SPL and imaging.
Article
Chemistry, Multidisciplinary
Hui-Yu Liu, Ravi Kumar, Chunting Zhong, Saleh Gorji, Liliia Paniushkina, Ramsha Masood, Uwe A. Wittel, Harald Fuchs, Irina Nazarenko, Michael Hirtz
Summary: A novel EV-capture strategy based on supported lipid membrane microarrays is proposed, enabling highly selective and efficient capture of EVs. The platform offers rapid capture, high specificity, and sensitivity, with only a small need in analyte volume. The nucleic acid cargo of captured EVs is retained on the lipid array, providing potential for downstream analysis.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Lisa Schlichter, Florian Bosse, Bonnie J. J. Tyler, Heinrich F. F. Arlinghaus, Bart Jan Ravoo
Summary: Nanoparticles with unique properties are patterned onto unmodified silicon substrates using dip pen nanolithography. Different types of nanoparticles can be used for writing nanostructures, including hydrophilic citrate and cyclodextrin functionalized gold nanoparticles and poly(acrylic) acid decorated magnetite nanoparticles. The deposition process is fast and can be done within 0.1 s. The resulting feature sizes range from 300 to 1780 nm and the heights of the deposited structures correspond to a single or double layer of nanoparticles. Dip pen nanolithography offers a versatile method for patterning nanoparticles on silicon substrates.
Article
Nanoscience & Nanotechnology
Nikolaos Farmakidis, Jacob L. Swett, Nathan Youngblood, Xuan Li, Charalambos Evangeli, Samarth Aggarwal, Jan A. Mol, Harish Bhaskaran
Summary: Nanocalligraphy scanning probe lithography (nc-SPL) overcomes the limitations of conventional scanning probe lithography by achieving real-time adjustment of structures at the micron to nanometer scales, improving throughput, tip longevity, and reliability, and can be applied in both positive and negative tone patterning modes.
MICROSYSTEMS & NANOENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Xia Huang, Christopher Neil Hunter, Cvetelin Vasilev
Summary: Local oxidation lithography shows potential for patterning proteins with nanometer accuracy on conductive substrates such as silicon, allowing for copatterning of multiple types of protein complexes with retained functions. Experimental conditions are established for efficient substrate surface modification and protein immobilization. This technique could be used for fabricating bioinspired nanoscale architectures for biosensors and solar cells.
ADVANCED MATERIALS INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Lorenzo Ramo, Maria Caterina Giordano, Giulio Ferrando, Paolo Canepa, Francesca Telesio, Luca Repetto, Francesco Buatier de Mongeot, Maurizio Canepa, Francesco Bisio
Summary: Thermal scanning-probe lithography (t-SPL) is a noninvasive high-resolution nanolithography technique that can be used for nanopatterning on thermosensitive materials and optically transparent substrates without altering the optical properties of the sample. This was achieved by intercalating a transparent conductive oxide film between the substrate and the patterning layer.
ACS APPLIED NANO MATERIALS
(2023)
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
Materials Science, Ceramics
Hyun Wook Shin, Jong Yeog Son
Summary: In this study, we investigated the ferroelectric domain wall current of BaTiO3 nanodots deposited on Nb-doped SrTiO3 substrates using the dip-pen nano-lithography (DPN) method. The crystallization of deposited BTO nanodots was achieved by heat treatment at 800 degrees C. The ferroelectric domain structures and the formation of domain walls were observed through piezoresponse force microscopy studies. By using a conducting atomic force microscope, relatively large ferroelectric domain wall currents and currents corresponding to the ferroelectric polarization direction around the domain wall were observed.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Ki Hong Park, Jeong-Sik Jo, Jinho Choi, Min Jung Kim, Kwun-Bum Chung, Young Ki Hong, Dong Hyuk Park, Jae-Won Jang
Summary: With the assistance of dip-pen nanolithography (DPN), the electron donor or acceptor behavior of a concentration-adjusted AuCl3 ink on a MoS2 thin-film transistor can be altered. Low concentration AuCl3 ink increases the mobility of MoS2, while high concentration AuCl3 ink decreases the mobility.
APPLIED SURFACE SCIENCE
(2022)
Review
Chemistry, Multidisciplinary
Haonan Li, Zhao Wang, Fengwei Huo, Shutao Wang
Summary: Dip-pen nanolithography is a surface modification technique that allows direct and controllable writing of micro/nano-array patterns on diverse substrates. It has shown high sensitivity, excellent selectivity, and fast response in target analyte detection and specific cellular recognition, making it a promising technology for fabricating versatile sensing biochips.
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
(2021)
Article
Nanoscience & Nanotechnology
Bogdan R. Borodin, Fedor A. Benimetskiy, Prokhor A. Alekseev
Summary: This study investigates the process of local anodic oxidation (LAO) of MoSe2 on an Au/Si substrate and identifies two different oxidation regimes depending on humidity levels. In the regime with a relative humidity of 60%-65%, in-plane isotropic oxidation occurs, while in the regime with a relative humidity of 40%-50%, in-plane anisotropic oxidation is observed. The study analyzes the size and shape of oxidized dots to discuss the oxidation kinetics of MoSe2.
Article
Chemistry, Physical
Abigail Rendos, Wenhan Cao, Margaret Chern, Marco Lauricella, Sauro Succi, Jorg G. Werner, Allison M. Dennis, Keith A. Brown
Summary: A suspension of nanoparticles can assemble into a macroscopic cellular phase that consists of particle-rich walls and particle-free voids under the influence of AC and DC voltages. This mechanism involves electrophoretic assembly and electrohydrodynamic flow-mediated spinodal decomposition. This work not only reveals the mechanism of cellular phase formation, but also presents a method to reversibly assemble nanoscale particles into microscale continuous structures.
Article
Instruments & Instrumentation
Abigail Rendos, Daryl W. Yee, Robert J. Macfarlane, Keith A. Brown
Summary: Magnetorheological fluids (MRFs) are suspensions of magnetic particles that solidify in the presence of a magnetic field. In this study, we investigate how reversible chemical links between particles influence MRF behavior, and find that functionalized particles exhibit higher yield stress and stiffness compared to unfunctionalized particles. We also explore the possibility of dynamically tuning MRF performance using magnetic fields and chemical modifications.
SMART MATERIALS AND STRUCTURES
(2022)
Editorial Material
Chemistry, Physical
Keith A. Brown
Summary: Research and games both involve making a series of choices, and active learning is an algorithmic process used in materials research. Examining active learning through games provides an accessible way to understand the process and its benefits, as well as the research questions that arise when applying active learning in materials research.
NPJ COMPUTATIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Joseph M. Palomba, Verda Saygin, Keith A. Brown
Summary: We developed a system that combines a MOF crystallite with an atomic force microscope cantilever to study the interaction between single-crystal MOFs and polymer films. By using this method, we discovered evidence of polymer intercalation into MOF pores. This approach can expedite the design of composites.
CHEMICAL COMMUNICATIONS
(2023)
Article
Biochemical Research Methods
Yihong Xu, Keith A. Brown
Summary: Efficiently pumping fluids without moving parts in miniaturized formats is challenging. In this study, a new type of fluid pump based on traveling-wave dielectrophoresis (twDEP) is proposed and explored numerically. The pump utilizes a series of electrodes driven at different phases to directly exert force on fluid molecules, enabling efficient fluid motion. The performance of twDEP pumps is predicted by a general equation that factors in voltage squared divided by the electrode period, complex permittivity of the fluid, and viscosity. The study suggests that the use of high power microwave technology and metasurfaces could make twDEP pumps practical.
Article
Chemistry, Physical
Wenlu Wang, Zhaoyi Zheng, Anton B. Resing, Keith A. Brown, Joerg G. Werner
Summary: This report presents an approach for obtaining conformal polymeric thin films on 3D structures using custom-designed dual-functional monomers. The authors demonstrated the full coating of a 3D mesoscaled battery electrode with an ultrathin lithium-ion permeable film using a specific monomer. The study provides insights into the control of thickness, permeability, and electronic properties of the films.
MOLECULAR SYSTEMS DESIGN & ENGINEERING
(2023)
Correction
Nanoscience & Nanotechnology
Verda Saygin, Bowen Xu, Sean B. Andersson, Keith A. Brown
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Milad Abolhasani, Keith A. Brown
Summary: In the past five years, artificial intelligence (AI) has made significant advancements in various aspects of daily life, such as health, transportation, and the digital world, by utilizing data. Inspired by these success stories, materials researchers have started to incorporate AI into experimental materials science to accelerate materials discovery and development. This article reviews the role of AI in experimental materials science and summarizes the key aspects and challenges of autonomous experimentation discussed in each contributed article.
Article
Materials Science, Multidisciplinary
Xiting Peng, Xiaonan Wang, Keith A. Brown, Milad Abolhasani
Summary: The contradiction between the importance of materials to modern society and their slow development process has led to the emergence of intelligent laboratories, which integrate high-throughput experimentation, automation, theoretical computing, and artificial intelligence. These laboratories can autonomously carry out designed experiments and make scientific discoveries. This article presents the basic concepts and foundations of this new research paradigm, showcases typical application scenarios through case studies, and envisions a collaborative human-machine meta laboratory in the future.
Article
Materials Science, Multidisciplinary
Verda Saygin, Kelsey Snapp, Aldair E. Gongora, Rashid Kolaghassi, Keith A. Brown
Summary: Vat polymerization is widely used for additive manufacturing of micro-architected structures. This study investigates the influence of oxygen inhibition on the mechanical properties of structures made using this technique. The surface of the structures was found to be incompletely cured, leading to softer properties. Post-print curing in nitrogen improved stiffness compared to air, but oxygen during printing resulted in softer samples than nitrogen photocured samples. These results highlight the significant impact of oxygen inhibition on micro-architected structures realized using vat polymerization.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
