Article
Chemistry, Multidisciplinary
Paolo Pellegrino, Isabella Farella, Mariafrancesca Cascione, Valeria De Matteis, Alessandro Paolo Bramanti, Antonio Della Torre, Fabio Quaranta, Rosaria Rinaldi
Summary: In recent years, Atomic Force Microscope (AFM)-based nanolithography techniques have become increasingly powerful. However, conventional methods are inefficient, have low pattern formation rates, and are complex to execute. In this study, we developed a simple and effective nanopatterning technique called Pulse-Atomic Force Lithography (P-AFL), which enabled us to pattern 2.5D nanogrooves on a thin polymer layer with sub-nanometre resolution, high accuracy, and reproducibility. We investigated the effects of P-AFL parameters on the morphology of 2.5D nanostructures and optimized the nanolithography process to achieve unconventional shape nanostructures with high accuracy and fidelity.
Article
Materials Science, Multidisciplinary
Shunyu Chang, Yongda Yan, Bo Li, Yanquan Geng
Summary: Thermomechanical nanolithography was utilized to manipulate materials at the nanoscale on a polymethyl methacrylate thin film. By controlling scratching velocity and heated temperature, various nanostructures were achieved, including polymer nanowires, nanopit arrays, and nanogrooves. The study demonstrated the feasibility of using stick-slip friction to predict the generation of nanopit structures after calibrating the machining parameters to ensure accuracy.
MATERIALS & DESIGN
(2021)
Article
Chemistry, Multidisciplinary
Paolo Pellegrino, Alessandro Paolo Bramanti, Isabella Farella, Mariafrancesca Cascione, Valeria De Matteis, Antonio Della Torre, Fabio Quaranta, Rosaria Rinaldi
Summary: The widespread use of nanotechnology has led to the development of novel nanofabrication techniques for high-resolution and reproducible nanostructures. In this study, a new method called Pulse-Atomic Force Microscopy was proposed for fabricating continuous structures with controlled depth profiles on polymer layers. This technique allows for precise spatial control and highly resolved 2.5D nanogrooves without the need for additional manufacturing steps.
Article
Chemistry, Analytical
Paolo Pellegrino, Isabella Farella, Mariafrancesca Cascione, Valeria De Matteis, Alessandro Paolo Bramanti, Lorenzo Vincenti, Antonio Della Torre, Fabio Quaranta, Rosaria Rinaldi
Summary: In recent years, mechanical tip-based nanolithography technique has been developed to meet the growing demand for nanostructures. However, the resulting pile-ups of nanostructures limit their use and integration. This study characterizes the structure of pile-ups at the edges of nanogrooves and proposes an effective strategy to remove them.
Article
Food Science & Technology
Ying Xin, Mengyang Chai, Fusheng Chen, Yucheng Hou, Shaojuan Lai, Hongshun Yang
Summary: The study compared the gel properties and nanostructures of chicken skin gelatin with commercial gelatins from porcine skin and tilapia skin. It found that chicken skin gelatin exhibited superior properties due to its higher imino acid content and ability to form intramolecular hydrogen bonds. Additionally, atomic force microscopy results showed that chicken skin gelatin had larger spherical aggregates, leading to dense rigid gel formation.
JOURNAL OF FOOD SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Ryota Fukuzawa, Daichi Kobayashi, Takuji Takahashi
Summary: Electrostatic force microscopy (EFM) is used to examine the electrostatic force between an AFM tip and sample surface, allowing evaluation of their capacitance and surface potential. The dependences of the electrostatic force on dc voltage and ac voltage frequency can be used to investigate carrier density, carrier type, and deep-level states in a semiconductor. Proper distance control is necessary in EFM to ensure accurate measurements, and the oscillation amplitude of a cantilever can be effectively used for feedback control. The 1 A-mode operation in EFM shows good robustness against the strong electrostatic force and allows proper measurements of tip-sample capacitance.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Chemistry, Physical
Jana Hennig, Valentin Feller, Pedro J. Martinez, Juan J. Mazo, Enrico Gnecco
Summary: This study investigates the influence of geometric shape on the orientation of nanoripples formed on a polystyrene surface. The results show that the geometric confinement significantly modifies the tendency of the ripples to align. The analysis of different shapes also reveals the importance of straight edges and sharp corners in the nanostructuring process.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Charlotte Ovenden, Ian Farrer, Maurice S. Skolnick, Jon Heffernan
Summary: Atomic force microscopy (AFM) assisted local anodic oxidation (LAO) is a low contamination method for semiconductor fabrication. In this study, we demonstrate the fabrication of deep and highly reproducible nanohole arrays on InP using LAO. The size and depth of the nanoholes and nano-oxide mounds can be controlled independently by altering AFM tip bias and humidity. The oxidation mechanism of semi-insulating InP during LAO is found to be similar to that of plasma oxidation.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Tianyao Zhang, Haibo Yu, Jialin Shi, Xiaoduo Wang, Hao Luo, Daojing Lin, Zhu Liu, Chanmin Su, Yuechao Wang, Lianqing Liu
Summary: This paper proposes an imaging method that combines atomic force microscopy with microlens-based scanning optical microscopy, which can achieve cross-scale rapid imaging and improve the efficiency of large-scale imaging and detection.
Article
Nanoscience & Nanotechnology
Nan Liu, Yi Cao, Yin-Lian Zhu, Yu-Jia Wang, Yun-Long Tang, Bo Wu, Min-Jie Zou, Yan-Peng Feng, Xiu-Liang Ma
Summary: The study presents a self-assembled uniform biphasic system as a potential stable and enduring RRAM medium, demonstrating advantages in stability, uniformity, and durability for further application in RRAM devices.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
A. Rodriguez, M. S. Jaman, O. Acikgoz, B. Wang, J. Yu, P. G. Grutzmacher, A. Rosenkranz, M. Z. Baykara
Summary: Ti3C2Tx nano-sheets exhibit solid lubrication properties on the nanoscale, reducing friction on silicon dioxide substrates, although not as effectively as few-layer graphene. This paves the way for further investigations into nanoscale solid lubrication achieved by Ti3C2Tx (MXene) nano-sheets.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Valentina Rohnacher, Florian Ullrich, Helge Eggers, Fabian Schackmar, Sebastian Hell, Adriana Salazar, Christian Huck, Gerardo Hernandez-Sosa, Ulrich W. Paetzold, Wolfram Jaegermann, Annemarie Pucci
Summary: Solution-processed tin oxide (SnOx) electron transport layers demonstrate excellent performance in various optoelectronic devices and offer the ease of deposition by various printing techniques. The properties of SnOx thin films have been investigated using various spectroscopies and microscopy techniques, showing improvements in structural and chemical properties with increasing annealing temperature. High performance perovskite solar cells with stabilized power conversion efficiency over 15% demonstrate the great potential of printed SnOx layers in solar energy applications.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Construction & Building Technology
Mohammad Aljarrah, Ayman Karaki, Eyad Masad
Summary: This study used generative adversarial networks (GANs) to reconstruct asphalt binder nanostructures and analyzed their influence on mechanical responses. The GANs generated distribution-free nanostructures by detecting hidden patterns in a given dataset. The mechanical responses of these nanostructures were analyzed using finite-element analysis. The results demonstrated the capability of GANs in generating probable arrangements of nanostructures and expanding the knowledge of probabilistic analysis of asphalt mechanical behavior.
JOURNAL OF MATERIALS IN CIVIL ENGINEERING
(2023)
Article
Materials Science, Composites
Ayse Cagil Kandemir, Fatma Donmez, Hatice Kaplan Can
Summary: This study focuses on achieving mechanical enhancements in biocompatible organic coatings by using solvent-based method to produce biocompatible nanocomposites. The addition of bentonite nanoclays as constituents leads to significant improvements in mechanical properties. The increase in volume fraction of bentonite nanoclays is primarily responsible for the considerable enhancements in hardness and modulus values.
POLYMER COMPOSITES
(2023)
Article
Chemistry, Multidisciplinary
Yijie Liu, Xuexuan Li, Yuliang Zhang, Lin Ge, Yingchun Guan, Zhen Zhang
Summary: This study presents a novel approach, the ultra-large scale stitchless atomic force microscopy (ULSS-AFM), which combines a compliant nano-manipulator (CNM) to enable high-throughput characterization of an area of up to 1 x 1 mm(2). Experimental results demonstrate the effectiveness of the ULSS-AFM in different scanning ranges, modes, resolutions, and frequencies. Compared to conventional AFMs, this approach allows for the characterization of ultra-large scale samples without stitching or bow errors, expanding the scanning area of traditional AFMs by two orders of magnitude and opening up important avenues for cross-scale scientific research and industrial applications in nano- and microscale.
