Article
Engineering, Environmental
Zhongnan Huang, Zhenglian Li, Zhimin Weng, Paramasivam Balasubramanian, Mingchun Lai, Wei Chen, Juewen Liu, Huaping Peng
Summary: In this study, a model system was developed to evaluate the effect of electrocatalysis (EC) on electrochemiluminescence (ECL) through kinetic analysis of electrocatalytic reactions. The results demonstrated a dual EC-mediated ECL enhancement and identified the catalytically active sites. With a better understanding of the EC mechanism, the researchers successfully used EC to regulate ECL and developed a biosensor with a record low limit of detection.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Yinan Zhang, Zhi-Bei Qu, Chu Jiang, Yingying Liu, Raghu Pradeep Narayanan, Dewight Williams, Xiaolei Zuo, Lihua Wang, Hao Yan, Huajie Liu, Chunhai Fan
Summary: In this research, a new method was developed to fabricate silver nanostructures with three-dimensional chirality using DNA origami-enabled aqueous solution metallization strategy. The study found that the chirality of silver nanostructures can be controlled through synergetic interactions, resulting in the synthesis of helical silver patterns with well-defined chirality and pitches. This method opens up new pathways for synthesizing programmable inorganic materials with arbitrary morphology and chirality.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Julia McKay, Michael J. Cowan, Cristian A. Morales-Rivera, Giannis Mpourmpakis
Summary: Thiolate-protected metal nanoclusters (TPNCs) have garnered significant interest for their stability, precise structure, and physicochemical properties. Through computational studies, strong correlation between metal-sulfur and sulfur-ligand bond dissociation energies has been identified, providing a pathway for predicting TPNC ligand removal energetics. Computational results also shed light on the kinetic favorability of breaking S-R over M-S bonds in certain complexes, aiding in the targeted design of TPNC catalysts.
Review
Chemistry, Multidisciplinary
Junjie Li, Francis Leonard Deepak
Summary: This review summarizes the in situ studies on crystal nucleation and growth, with a particular focus on the latest research progress since 2016. The nonclassical mechanisms and various material properties have significant effects on the formation and growth of crystals.
Article
Chemistry, Multidisciplinary
Qinzhen Li, Sha Yang, Jinsong Chai, Hui Zhang, Manzhou Zhu
Summary: This study investigates the factors influencing the size modulation of nanoclusters by diphosphines and demonstrates the role of diphosphines in controlling the size, configuration, and optical properties of nanoclusters. By controlling the length of the diphosphines and introducing a rigid group, the size and structure of nanoclusters can be finely tuned, enabling precise control of the physicochemical properties of nanoclusters for practical applications.
Article
Multidisciplinary Sciences
Walid Dachraoui, Trond R. Henninen, Debora Keller, Rolf Erni
Summary: Understanding the interaction between particles is crucial for the growth of nanomaterials. Direct imaging at the atomic level in liquid phase can help establish new theoretical models for nanoparticle growth. This study investigates the growth mechanisms of platinum nanocrystals and reveals distinct atomic pathways for growth.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Multidisciplinary
Hoduk Cho, Ivan A. Moreno-Hernandez, Vida Jamali, Myoung Hwan Oh, A. Paul Alivisatos
Summary: The study uses liquid-phase transmission electron microscopy and electron beam lithography to investigate interactions between nanorods in a predefined potential energy landscape. By changing starting spatial arrangements, the self-assembly behavior of nanorods following lift-off can be tuned.
Article
Chemistry, Analytical
Jesus Navarro, Gemma Cepria, Javier Camacho-Aguayo, Santiago Martin, Alejandro Gonzalez Orive, Susana de Marcos, Javier Galban
Summary: In this manuscript, a method for the fluorometric determination of tyramine is described. The method utilizes the direct reaction between Au(III) and tyramine to produce fluorescent gold nanoclusters, allowing for fast and stable detection of tyramine. The method shows high accuracy and sensitivity, making it suitable for the determination of tyramine in food samples.
Article
Engineering, Electrical & Electronic
J. von Borany, H-j Engelmann, K-h Heinig, E. Amat, G. Hlawacek, F. Kluepfel, R. Huebner, W. Moeller, M-l Pourteau, G. Rademaker, M. Rommel, L. Baier, P. Pichler, F. Perez-Murano, R. Tiron
Summary: This study presents the fabrication of vertically stacked Si/SiO2/Si nanopillars with embedded Si nanodots, which serve as key elements for a gate-all-around single-electron transistor. The process combines bottom-up and top-down technologies to satisfy the requirements of future 3D device architectures. The formation of single Si nanodots within a confined oxide volume is experimentally validated. The optimized conditions for nanopillar/nanodot formation and the influence of critical dimension variability on the transistor functionality are discussed.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Shuai Zhang, Pan He, Shuoyi Jing, Gang Chen, Guangzhao Li, Zhongzui Wang, Rui Han, Yijun Li
Summary: In this study, basalt fiber (BF) was irradiated and activated by electron beam, followed by the growth of SiO2 on the surface. The modified BF showed a rough surface which resulted in stronger shear force during melt processing and increased ordering of the molecular chains, leading to the generation of more highly ordered beta crystals in the composites. The proposed surface roughing strategy is expected to promote the application of BF reinforced thermoplastic composites.
Article
Chemistry, Physical
A. Yu Kizjak, A. A. Evtukh, O. L. Bratus, S. Antonin, V. A. Ievtukh, O. Pylypova, A. K. Fedotov
Summary: This study investigates electron transport mechanisms in SiO2(Si)&FexOy(Fe) granular composite films. The results show variable-range hopping conductivity at low electric fields. The Efros-Shklovsky model is applicable in the temperature range of 115<180 K, while the Mott model is applicable at higher temperatures. The characteristics of traps and transport processes are determined using these models. At intermediate and high electric fields, the field enhanced thermal activation of electrons is observed, leading to a temperature independent current.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Wenjie Zhang, Huimin Kong, Zhennan Wu, Qaofeng Yao, Linan Wang, Liang Quo, Yanjie He, Xiaoguang Qiao, Xinchang Pang, Jianping Xie
Summary: The controlled synthesis of ultrasmall metal nanocluster (NC) assemblies with a specific size and number of NCs can be achieved using star-like diblock copolymer unimolecular micelles as a scaffold. The length of the P4VP block in the polymers can be adjusted to control the size of the NC assemblies. Thiolate ligands play a crucial role in determining the size of individual nanoclusters and enhancing the stability of the NC assemblies, which have promising applications in catalysis, optics, and biomedicine.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Fangfang Xia, Axin He, Haitao Zhao, Yang Sun, Qiao Duan, Sk Jahir Abbas, Jianjun Liu, Zeyu Xiao, Weihong Tan
Summary: Functionally modified aptamer conjugates are promising tools for targeted imaging or treatment of various diseases. However, their broad applications are limited by in vivo instability. To overcome this challenge, a covalent modification-free strategy using gold nanoclusters to enhance the in vivo stability of aptamers has been developed, leading to improved tumor-targeted recognition and retention.
Article
Multidisciplinary Sciences
Wyatt Vine, Mykhailo Savytskyi, Arjen Vaartjes, Anders Kringhoj, Daniel Parker, James Slack-Smith, Thomas Schenkel, Klaus Molmer, Jeffrey C. McCallum, Brett C. Johnson, Andrea Morello, Jarryd J. Pla
Summary: The sensitivity of pulsed electron spin resonance (ESR) measurements has been greatly enhanced by using superconducting microresonators and quantum-limited Josephson parametric amplifiers, achieving an improvement of more than four orders of magnitude. Incompatibility between Josephson junction-based devices and magnetic fields has resulted in the design of separate microwave resonators and amplifiers, leading to complex spectrometers and technical barriers. However, by coupling an ensemble of spins directly to a weakly nonlinear and magnetic field-resilient superconducting microwave resonator, this issue is circumvented. Pulsed ESR measurements with amplification within the device are successfully performed, demonstrating a high sensitivity and potential for application under conventional ESR operating conditions.
Article
Materials Science, Multidisciplinary
Xiqi Ma, Xiaojuan Wang, Cai Liu, Baosheng Ge, Hua He, Qi Dai, Zhixiong Zhang, Jinyi Yu, Werner M. Nau, Fang Huang
Summary: HBMA is a novel heparanase degradable heparin-based microcarrier developed for specific staining, targeting, and inhibiting tumor cells with high metastatic potential. Results from various assays demonstrate that HBMA effectively suppresses the proliferation and migration of selectively targeted tumor cells, highlighting its potential as a promising cancer theranostic agent to prevent tumor metastasis.
MATERIALS & DESIGN
(2021)
Article
Chemistry, Multidisciplinary
Filippo Giannazzo, Salvatore Ethan Panasci, Emanuela Schiliro, Patrick Fiorenza, Giuseppe Greco, Fabrizio Roccaforte, Marco Cannas, Simonpietro Agnello, Antal Koos, Bela Pecz, Marianna Spankova, Stefan Chromik
Summary: In this study, 2D/3D heterojunction diodes were fabricated using pulsed laser deposition. The doping levels of SiC surfaces were varied to investigate the transport properties of MoS2. The results showed that surface doping of SiC can significantly influence the current injection across the heterojunctions, resulting in highly rectifying behavior and enhanced current injection. The dominant mechanisms governing current flow were identified, and the effective barriers for different contacts were determined.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Biochemistry & Molecular Biology
Federica De Gaetano, Angela Scala, Consuelo Celesti, Kim Lambertsen Larsen, Fabio Genovese, Corrado Bongiorno, Loredana Leggio, Nunzio Iraci, Nunzio Iraci, Antonino Mazzaglia, Cinzia Anna Ventura
Summary: In this study, nanoparticles based on ACyD8 were developed for potential intranasal delivery of IDE to treat neurological disorders. The nanoparticles effectively loaded IDE and showed sustained release. In vitro studies demonstrated the lack of toxicity and antioxidant effect of the IDE/ACyD8-NPs on neuronal cells.
Article
Physics, Condensed Matter
Valentina Iacono, Salvatore Mirabella, Francesco Ruffino
Summary: Electrochemical water-splitting using renewable energy is aimed at producing green H-2. Efficient and sustainable electrocatalysts, such as Ni oxyhydroxides, are needed for a proper energy transition. Optimizing the intrinsic properties and synthesis procedure is still necessary.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2023)
Review
Chemistry, Analytical
Francesco La Via, Daniel Alquier, Filippo Giannazzo, Tsunenobu Kimoto, Philip Neudeck, Haiyan Ou, Alberto Roncaglia, Stephen E. E. Saddow, Salvatore Tudisco
Summary: In recent years, SiC has seen new applications proposed in various fields. This review discusses the development status, main challenges, and future prospects of several emerging SiC applications. The paper extensively reviews the use of SiC in high temperature space applications, high temperature CMOS, high radiation hard detectors, new optical devices, high frequency MEMS, devices with integrated 2D materials, and biosensors. The development of these applications, particularly in the 4H-SiC ones, has been facilitated by advancements in SiC technology and improvements in material quality and price. However, further development in these fields requires the development of new processes and improvement in material properties. In the case of 3C-SiC applications, despite the performance of the devices and their potential market, the lack of material and specific processes development, as well as the limited availability of SiC foundries, hamper further progress.
Article
Chemistry, Multidisciplinary
Antonino Scandurra, Valentina Iacono, Stefano Boscarino, Silvia Scalese, Maria Grazia Grimaldi, Francesco Ruffino
Summary: Non-enzymatic electrochemical glucose sensors play a crucial role in biomedical applications, enabling portable diabetic testing kits and continuous glucose monitoring systems. Nanostructured materials offer several advantages, such as high sensitivity and reduced dependence on analyte diffusion near the electrode-solution interface. This study focuses on modeling the chronoamperometric response of four electrodes made of nanostructured gold onto graphene paper.
Article
Green & Sustainable Science & Technology
Salvatore Valastro, Emanuele Smecca, Giovanni Mannino, Corrado Bongiorno, Giuseppe Fisicaro, Stefan Goedecker, Valentina Arena, Carlo Spampinato, Ioannis Deretzis, Sandro Dattilo, Andrea Scamporrino, Sabrina Carroccio, Enza Fazio, Fortunato Neri, Francesco Bisconti, Aurora Rizzo, Corrado Spinella, Antonino La Magna, Alessandra Alberti
Summary: With the projected rapid growth of the market uptake of perovskite solar cells (PSCs), the use of this clean energy technology will play a crucial role in reducing the global carbon footprint. However, the presence of toxic lead (Pb) poses a major barrier to its full commercialization. Researchers have demonstrated that the application of a transparent titanium dioxide (TiO2) sponge can effectively prevent Pb leakage, leading to a more sustainable solution and accelerated practical applications.
NATURE SUSTAINABILITY
(2023)
Article
Physics, Applied
M. Vivona, P. Fiorenza, V. Scuderi, F. La Via, F. Giannazzo, F. Roccaforte
Summary: The impact of stacking faults (SFs) on the characteristics of 4H-SiC Schottky diodes was investigated under both forward and reverse bias. Under forward bias, SFs had no significant effect on the ideality factor and barrier height, but under reverse bias, an anomalous increase in leakage current was observed. The leakage current behavior can be explained by a space-charge limited current model, indicating the presence of trapping states in 4H-SiC. The results provide insights into unexpected failures in 4H-SiC Schottky diodes.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Salvatore Ethan Panasci, Ioannis Deretzis, Emanuela Schiliro, Antonino La Magna, Fabrizio Roccaforte, Antal Koos, Bela Pecz, Simonpietro Agnello, Marco Cannas, Filippo Giannazzo
Summary: The interface structure and electronic properties of monolayer MoS2 domains grown by chemical vapor deposition on 4H-SiC(0001) are investigated. The domains exhibit high crystalline quality and are epitaxially oriented on the basal plane. The presence of a van der Waals gap between MoS2 and SiC is observed. The calculations show different levels of refinement in the MoS2/4H-SiC(0001) system which result in different bonding and doping behaviors.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2023)
Article
Chemistry, Physical
Emanuela Schiliro, Patrick Fiorenza, Raffaella Lo Nigro, Bruno Galizia, Giuseppe Greco, Salvatore Di Franco, Corrado Bongiorno, Francesco La Via, Filippo Giannazzo, Fabrizio Roccaforte
Summary: Metal-oxide-semiconductor (MOS) capacitors with Al2O3 as a gate insulator were fabricated on cubic silicon carbide (3C-SiC) using both thermal and plasma-enhanced Atomic Layer Deposition (ALD). The deposited Al2O3/SiO2 stacks showed lower negative shifts of the flat band voltage VFB compared with the conventional single SiO2 layer. The plasma-enhanced ALD approach produced Al2O3 layers with better insulating behavior in terms of leakage current breakdown distribution.
Article
Crystallography
Giovanni Giorgino, Giuseppe Greco, Maurizio Moschetti, Cristina Miccoli, Maria Eloisa Castagna, Cristina Tringali, Patrick Fiorenza, Fabrizio Roccaforte, Ferdinando Iucolano
Summary: The role of magnesium (Mg) doping and its electrical activation on the off-state of p-GaN/AlGaN/GaN HEMTs has been investigated. TCAD simulations were used to study the effect of different Mg doping profiles on the band diagrams of the structure. Experimental Capacitance-Voltage measurements were utilized to obtain information on the net acceptor concentration in the p-GaN. The results showed that the Mg activation process plays a key role in improving the overall performance of normally-off GaN HEMTs.
Article
Chemistry, Multidisciplinary
Gianfranco Sfuncia, Giuseppe Nicotra, Filippo Giannazzo, Bela Pecz, Gueorgui Kostov Gueorguiev, Anelia Kakanakova-Georgieva
Summary: Beyond the predictions and calculations, a buckled GaN monolayer was obtained at the graphene/SiC interface through confinement conditions. The atomic resolution imaging revealed the atomic order and formation mechanism of the intercalated structure.
Article
Chemistry, Multidisciplinary
Gianfranco Sfuncia, Giuseppe Nicotra, Filippo Giannazzo, Bela Pecz, Gueorgui Kostov Gueorguiev, Anelia Kakanakova-Georgieva
Summary: In this study, a buckled GaN monolayer was obtained at the graphene/SiC interface under confinement using metal-organic chemical vapor deposition (MOCVD). Conductive atomic force microscopy (C-AFM) and scanning transmission electron microscopy (S/TEM) were used for characterization. The experiment confirmed the buckling parameter and revealed the atomic order of the GaN monolayer, providing new insights for predictive studies based on first-principles calculations.
