Article
Chemistry, Physical
Yuyao Zhang, Xiaoying Zhu, Bokai Zhu, Chiheng Chu, Baoliang Chen
Summary: The hydrophobicity of nanomaterials plays a crucial role in various interfacial phenomena. However, it is challenging to study the high-resolution surface hydrophobicity at the nanoscale. In this study, a chemical force microscopy technique is used to profile in situ hydrophobicity images with nanoscale resolution, providing significant improvement compared to traditional methods. The method is applied to recognize the spatial fine structure hydrophobicity of different materials and reveals new findings regarding the hydrophobicity of graphene oxides (GO) and the influence of wrinkles/edges on hydrophobicity. Furthermore, the technique enables the observation of local oxidation variation during interfacial reactions.
Article
Engineering, Electrical & Electronic
R. Rajesh Kumar, Abhay Singh Gour, Venimadhav Adyam
Summary: This article discusses a new design of a standalone, cost-effective, vibration-free activated carbon-based cryosorption pump and its integration with the scanning probe microscopy system. Thermal simulation analysis shows that a spiral wound copper mesh-based partition in the cryosorption pump improves the radial temperature distribution. Experimental analysis demonstrates that the cryosorption pump can operate with a maximum liquid nitrogen consumption of 25 L and continuous operation for 4.5 hours. It also shows an improvement in spatial resolution in both conductive atomic force microscopy and magnetic force microscopy.
IEEE SENSORS JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Xiaoli Huang, Haojie Lai, Junjie Liu, Qiulan Chen, Weiguang Xie
Summary: The contact characteristic and intrinsic conductivity of single MoO2 nanosheet grown by CVD method were investigated. It was found that the contact of Ag with MoO2 was better than that of Au. The measured intrinsic conductivity of MoO2 at low bias condition is as high as (2.5 +/- 1.3) x 104 S/cm. Non-linear behavior in IV characteristic and breakdown behavior were observed with increasing bias due to the contact effect. The supported current density is around 107 A/cm2, indicating that MoO2 is a superior conductive transition metal oxide material for low-voltage applications.
Article
Engineering, Multidisciplinary
Ryota Fukuzawa, Takuji Takahashi
Summary: This paper proposes peak-tracking scanning capacitance force microscopy (PTSCFM) for capacitance-voltage (C-V) measurements. PT-SCFM can extract the main feature of the C-V curve without the need for a DC voltage sweep. It allows for simultaneous imaging of the distribution of C-V values and topography, and enables analysis based on frequency dependence.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2022)
Article
Biochemical Research Methods
He Zhao, Kailash Shrestha, Dale K. Hensley, B. Jill Venton
Summary: Carbon nanospikes (CNSs) are a new nanomaterial that enhances the sensitivity for dopamine detection. In this study, CNS-modified electrodes (CNSMEs) were evaluated for the detection of adenosine, hydrogen peroxide ( H2O2), and histamine. The results showed that CNSMEs had higher signals compared to conventional electrodes (CFMEs), with increased sensitivity for adenosine (4.8 times), H2O2 (1.5 times), and histamine (2 times). CNSMEs also promoted the formation of secondary products for adenosine and histamine, allowing differentiation from analytes with similar oxidation potentials. CNSs selectively enhanced the sensitivity for adenosine and histamine compared to H2O2. The use of CNSMEs in brain slices and tissue measurements showed high selectivity and low fouling.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
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
Multidisciplinary Sciences
Hsueh-Ying Chen, C. Blake Wilson, Robert Tycko
Summary: The spatial resolution of MRI is limited by signal detection sensitivity, but can be improved by performing measurements at low temperature and using dynamic nuclear polarization (DNP) technique. This allows for higher resolution and shorter data acquisition times, offering a promising direction for high-resolution MRI studies.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Chemistry, Analytical
Xu-Zhao Zhang, Shu-Jing Gao, Ying-Jie Qu, Hai-Ting Wang
Summary: The influences of the atomic force microscopy (AFM) probe on the phase and electrical properties of rubrene crystal device are studied systematically via the scanasyst-air and electrostatic force microscopy (EFM) technique. The real-time dynamic current of the single-crystalline device changes with the probe engaging and withdrawing in the scanasyst-air mode. Various measurements are carried out to examine the influence of the probe on the organic device, including changing the scan width, scan frequency, and scan distance between tip and crystal. The electrical properties of rubrene device to different polarity of tip voltage are investigated via EFM technique.
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Praveen Gupta, Linda S. Schadler, Ravishankar Sundararaman
Summary: The study demonstrates the effectiveness of machine learning in extracting interphase permittivity in polymer nanocomposite materials. Machine learning models outperform analytical approaches by capturing significant geometric complexity and improving the accuracy of permittivity prediction.
MATERIALS CHARACTERIZATION
(2021)
Article
Biotechnology & Applied Microbiology
H. J. Geertsema, G. Aimola, V Fabricius, J. P. Fuerste, B. B. Kaufer, H. Ewers
Summary: Left-handed DNA probes improve super-resolution DNA-PAINT imaging in the nucleus by reducing background signal, maintaining the same specificity and multiplexing capabilities as right-handed DNA probes.
NATURE BIOTECHNOLOGY
(2021)
Editorial Material
Multidisciplinary Sciences
Telmo O. Paiva, Albertus Viljoen, Yves F. Dufrene
Summary: Advancements in atomic force microscopy (AFM) techniques and methodologies in microbiology have enhanced our understanding of microbial cell surfaces. Recent studies have shown that AFM imaging of cells and membranes at or near molecular resolution enables detailed visualization of membrane-drug interactions.
NATURE COMMUNICATIONS
(2022)
Review
Chemistry, Multidisciplinary
Yixuan Zhu, Zhibing Tan, Wenjing Hong
Summary: Simultaneous characterization of the mechanical and electrical properties of single-molecule junctions provides complementary information for analyzing single molecules and studying the correlations between their electrical and mechanical properties. Exploring the mechanical properties of single-molecule junctions is helpful for addressing the issue of inadequate structural information extraction from single-molecule junctions.
Article
Physics, Multidisciplinary
Lu-Chuan Liu, Luo-Yuan Qu, Cheng Wu, Jordan Cotler, Fei Ma, Ming-Yang Zheng, Xiu-Ping Xie, Yu-Ao Chen, Qiang Zhang, Frank Wilczek, Jian-Wei Pan
Summary: Research utilizing color erasure detectors has demonstrated improved spatial resolution in imaging tasks beyond the diffraction limit. Experimental measurements using two telescopes showed a distance measurement of sources of different colors at 1.43 km, exceeding the diffraction limit of a single telescope by about 40 times.
PHYSICAL REVIEW LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Yeseong Choi, Su-Mi Kim, Youhee Heo, Gyudo Lee, Ji Yoon Kang, Dae Sung Yoon
Summary: The study found that with increasing concentrations of Aβ(42) oligomers, the surface charge of exosomes increased, indicating that exosomes contain more Aβ(42) and may serve as transport vesicles for Aβ(42).
Article
Chemistry, Physical
Bin Shi, Xuehui Gan, Chi Zhang, Haojie Lang, Kun Zou, Tianzhao Bu, Yitian Peng
Summary: The study investigates nanoscale triboelectrification and nanofriction on insulating SiO2 surface using AFM and scanning Kelvin probe microscopy. It finds that nanofriction increases with enhanced tribocharge density and decreases with reduced tribocharges due to charge diffusion. These findings provide insights into the role of nanoscale triboelectrification on nanofriction and could help control energy dissipation in sliding nanofriction.
Article
Instruments & Instrumentation
Srinivasa Reddy Tamalampudi, Sergio Santos, Chia-Yun Lai, Tuza A. Olukan, Jin-You Lu, Nitul Rajput, Matteo Chiesa
REVIEW OF SCIENTIFIC INSTRUMENTS
(2020)
Article
Materials Science, Coatings & Films
A. Mustafa, M. Bououdina, B. Al-Najar, T. Souier, F. Bensouici, B. Belache
Summary: Transparent co-doped TiO(2)thin films were fabricated by sol-gel dip-coating using low concentrations of neodymium (Nd), silver (Ag), and copper (Cu). The doping significantly affected the morphology, crystallinity, and optical properties of the films, leading to larger crystallite size compared to pure TiO(2). Photocatalytic degradation of MB was significantly reduced upon doping, with a proposed mechanism based on the combined effects of doping, annealing, and substrate nature.
SURFACE ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Basim Al Farsi, Faisal Al Marzouqi, Mohammed Al-Maashani, Mohammed T. Souier, Myo Tay Zar Myint, Mohammed Z. Al-Abri
Summary: A rapid microwave-assisted process was used to synthesize quasi-aligned Al-doped ZnO nanorods on a glass substrate. The crystal structure, morphology, and optical properties were investigated, with significant changes in morphology and optical properties observed with Al doping, especially at 1% concentration. The photocatalytic degradation of phenol was enhanced by Al-doping due to bandgap narrowing and enhancement of visible light absorption, particularly at 1% Al concentration.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
B. Al Farsi, T. M. Souier, F. Al Marzouqi, M. Al Maashani, M. Bououdina, H. M. Widatallah, M. Al Abri
Summary: Transparent pure and Al-doped zinc oxide thin films were successfully deposited on glass substrates using the sol-gel dip-coating technique. The study found that Al doping and annealing temperature have significant effects on the structural, morphological, optical properties, and photocatalytic activity of the films. Al doping was found to improve the photocatalytic activity of the films.
Article
Electrochemistry
B. Malki, G. Berthome, T. Souier, C. Boissy, I Guillotte, B. Baroux
Summary: This study investigates crevice corrosion of ferritic stainless steels in chloride-containing media using a dual experimental and computational technique. The specially designed set-up monitors current and potential, while a 3D finite element model provides mechanistic interpretation of the results. The asymptotic current and potential at the end of the experiments are found to be more realistic indicators of crevice corrosion kinetics.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Ahmed E. Salih, Mohamed Elsherif, Fahad Alam, Matteo Chiesa, Haider Butt
Summary: In this study, gold nanoparticles (GNPs) were functionalized with 3-mercaptopropionic acid (GNPs-MPA) and doped into hydrogel materials using the breathing-in/breathing-out (BI-BO) method. The pH-responsive optical and colorimetric properties of the GNPs-MPA solutions and gels were investigated through UV-Vis spectroscopy and microscopy. The results showed that the color of the solutions and gels changed from red to indigo with a decrease in pH, indicating their potential as pH-triggered sensors.
Article
Physics, Applied
Tuza Olukan, Jekaterina Sydorenko, Atanas Katerski, Mariam Al Mahri, Chia-Yun Lai, Abdulrahman Al-Hagri, Sergio Santos, Matteo Chiesa
Summary: The synthesis of TiO2 thin films using chemical spray pyrolysis method with different ratios of titanium isopropoxide (TTIP) to acetylacetone (AcacH) has demonstrated the highest photodegradation at a ratio of 1:8. These films show promise in indoor pollution treatment. The incorporation of carbon into the surface and TiO2 lattice may contribute to the observed performance, but the mechanism is still unclear. Here, the correlation between contact potential difference (CPD) contrast maps and functionality dependence on the TTIP to AcacH ratio is reported, suggesting a faster transfer of charge carriers to the surface.
APPLIED PHYSICS LETTERS
(2022)
Article
Energy & Fuels
Mohammed Bin Afif, Abdulla Bin Afif, Harry Apostoleris, Krishiv Gandhi, Anup Dadlani, Amal Al Ghaferi, Jan Torgersen, Matteo Chiesa
Summary: The rapidly declining costs of renewable energy technologies have made solar and wind the cheapest sources of energy in many parts of the world. This not only enables the rapid decarbonization of the electricity sector but also reduces the costs of energy-intensive decarbonization efforts in other areas.
Article
Chemistry, Physical
Elhachmi Guettaf Temam, Faisal Djani, Saad Rahmane, Hachemi Ben Temam, Brahim Gasmi
Summary: In this study, Al and Ni doped TiO2 thin films were prepared by sol-gel dip-coating method, and the effect of photocatalysis process on the properties of TiO2 based films was investigated. The experimental results showed that the Ni and Ni/Al doped TiO2 films exhibited high photocatalytic activity, as well as small grain size, large film thickness, and high surface roughness.
SURFACES AND INTERFACES
(2022)
Article
Engineering, Electrical & Electronic
Srinivasa Reddy Tamalampudi, Ghada Dushaq, Nitul S. Rajput, Matteo Chiesa, Mahmoud S. Rasras
Summary: In this study, 50 nm thick amorphous indium telluride films were fabricated using RF sputtering technique on a silicon substrate. These films were then used to create back-gated field-effect photodetectors. The detectors exhibited a broad wavelength response, high photo responsivity, and good frequency response. They also showed excellent stability under ambient conditions.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Psychology, Biological
Fengyuan Liu, Petter Holme, Matteo Chiesa, Bedoor AlShebli, Talal Rahwan
Summary: Using algorithmic tools, researchers found pervasive gender inequalities among academic editors, with only 8% of editors-in-chief being women. Men editors were more likely to self-publish in the journal they edit. Career length explains the gender gap among editors, but not editors-in-chief.
NATURE HUMAN BEHAVIOUR
(2023)
Article
Physics, Applied
Sergio Santos, Karim Gadelrab, Tuza Olukan, Josep Font, Victor Barcons, Matteo Chiesa
Summary: Quantifying conservative forces in multifrequency atomic force microscopy involves solving the general equations expressed in terms of interaction energies. Power law expressions are commonly used for electrostatic, ferroelectric, magnetic, or long range forces. This study discusses long range forces modeled using power laws with exponent values ranging from 2-5, and applies multifrequency theory to explore the relevant parameter space. Numerical integration of motion equations shows a narrow range of operational parameters for valid approximations during imaging, with errors as low as 10% for all explored exponents.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Sergio Santos, Karim Gadelrab, Lamiaa Elsherbiny, Xaver Drexler, Tuza Olukan, Josep Font, Victor Barcons, Matteo Chiesa
Summary: The multifrequency formalism is generalized and exploited in bimodal and trimodal atomic force microscopy (AFM) to quantify van der Waals interactions with small forces. The use of higher modes in the multifrequency force spectroscopy formalism, including trimodal AFM, improves material property quantification compared to bimodal AFM. Bimodal AFM with the second mode is valid when the drive amplitude of the first mode is significantly larger. The present approach allows for robust quantification of weak long range forces and extends the available channels for high resolution.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Proceedings Paper
Computer Science, Artificial Intelligence
Odin Foldvik Eikeland, Filippo Maria Bianchi, Inga Setsa Holmstrand, Sigurd Bakkejord, Matteo Chiesa
Summary: In this study, we focused on a power grid in the Arctic region of Northern Norway to detect power disturbances and identify significant variables using machine learning techniques. The results showed that linear models achieved the highest performance in fault detection, with flicker amount and gust wind speed being identified as important factors in explaining the disturbances.
INTELLIGENT TECHNOLOGIES AND APPLICATIONS
(2022)
Review
Green & Sustainable Science & Technology
Hannah Schweitzer, Nerea J. Aalto, Wolfgang Busch, Dennis Tin Chat Chan, Matteo Chiesa, Edel O. Elvevoll, Robin Gerlach, Kirsten Krause, Karel Mocaer, James J. Moran, Joseph P. Noel, Shalaka Kiran Patil, Yannick Schwab, Rene H. Wijffels, Angela Wulff, Lise Ovreas, Hans C. Bernstein
Summary: The article discusses next-generation biotechnologies inspired by ecological processes to achieve carbon capture, sequestration, and utilization, focusing on identifying and utilizing control points for CO2 and CH4 to drive innovation in carbon capture technologies.
