Article
Nanoscience & Nanotechnology
Maria de Lourdes Gonzalez-Juarez, Carlos Morales, Jan Ingo Flege, Eduardo Flores, Marisol Martin-Gonzalez, Iris Nandhakumar, Darren Bradshaw
Summary: In this work, a switch from n-type to p-type conductivity in electrodeposited Cu-3(HHTP2) is observed, most likely due to oxygen molecular doping. The synthesis of electrically conductive 2D metal-organic frameworks has been achieved through the introduction of highly conjugated organic linkers. However, the porous structure and unsaturated metal sites in MOFs make them susceptible to ambient adsorbates, which can affect their charge transport properties.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Multidisciplinary Sciences
R. Nakajima, D. Hirobe, G. Kawaguchi, Y. Nabei, T. Sato, T. Narushima, H. Okamoto, H. M. Yamamoto
Summary: Chiral molecules exhibit spin-selective charge emission, which is called chirality-induced spin selectivity. Despite being made of light elements, their spin polarization can exceed that of typical ferromagnets. This has potential applications in the chiral spintronics field. Through magnetoresistance measurements, we observed the two suggested phenomena, effective enhancement of spin-orbit interactions and chirality represented by oppositely polarized spins, in an organic chiral superconductor. Our findings provide insights into the origin of spin selectivity in chiral molecules and contribute to the development of superconducting spintronics research.
Article
Physics, Multidisciplinary
Gian-Luca Schmid, Chun Tat Ngai, Maryse Ernzer, Manel Bosch Aguilera, Thomas M. Karg, Philipp Treutlein
Summary: By utilizing optical coherent feedback, nanomechanical membrane cooling was achieved remotely using atomic spins as a controller, leading to cooling the membrane to a very low temperature at room temperature. This method has the potential to cool the mechanical oscillator close to its quantum mechanical ground state and prepare nonclassical states.
Article
Chemistry, Multidisciplinary
Danna E. Freedman, Daniel W. Laorenza
Summary: One goal of the second quantum revolution is the development of a quantum Internet, which requires scalable and tunable materials. Solution-processable molecular systems show great potential in meeting these requirements and advancing the quantum Internet.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
R. M. Goldblatt, A. M. Martin, A. A. Wood
Summary: In this study, we used nitrogenvacancy centers in diamond to probe the nuclear spins within dark paramagnetic nitrogen defects in the diamond lattice. We demonstrated that the effect of greatly enhanced coupling to radio frequency control fields can be tuned by an external magnetic field. This work lays the foundations for rapid control of long-lived spin qubits at room temperature.
Article
Chemistry, Multidisciplinary
Jose J. Araujo, Carl K. Brozek, Hongbin Liu, Anna Merkulova, Xiaosong Li, Daniel R. Gamelin
Summary: The passage discusses the characteristics and control methods of degenerately doped metal-oxide nanocrystals, focusing on the influence of charge-compensating aliovalent dopants on the potentials of excess conduction-band electrons. Experimental and modeling analyses reveal significant differences between aliovalent doping and photodoping in compensating conduction-band electrons, with spectroelectrochemical techniques used to investigate these differences and enhance our understanding of these oxide nanocrystals.
Article
Engineering, Electrical & Electronic
Raphael Pfattner, Elena Laukhina, Jinghai Li, Rossella L. Zaffino, Nuria Aliaga-Alcalde, Marta Mas-Torrent, Vladimir Laukhin, Jaume Veciana
Summary: Composites with different components exhibit unique synergistic properties, and the energy bandgap in their electronic structure can be tuned to design tailor-made systems. A study found an emergent insulator-metal transition in bilayered thin-films at room temperature, and the electrical/optical bandgaps could be adjusted. This makes these materials ideal candidates for flexible and soft sensors for various applications.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jonghoon Lee, Kyeong-Yoon Baek, Jeongjae Lee, Heebeom Ahn, Yongjin Kim, Hyungbin Lim, Yeeun Kim, Jaeyong Woo, Samuel D. Stranks, Sung Keun Lee, Henning Sirringhaus, Keehoon Kang, Takhee Lee
Summary: Organic metal-halide perovskites (OHPs) are attracting attention as next-generation semiconducting materials, but current doping methods have limitations. This study successfully included a molecular dopant into 2D Ruddlesden-Popper perovskites, increasing electrical current by about 60 times while maintaining a clean film surface. The mechanism of immersion doping, where a solvent molecule facilitates bulk diffusion of the dopant molecule, is provided. This method enables bulk molecular doping in OHPs and can be used to control their electrical properties for electronic and optoelectronic devices.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Composites
Dong-Li Zhang, Qi-Kun Feng, Shao-Long Zhong, Di-Fan Liu, Yu Zhao, Zhi-Min Dang
Summary: This study successfully synthesized metal-organic frameworks with high porosity and low dielectric constant, revealing the significant influence of polar molecular confinement effect under different coordination systems on their dielectric properties. Additionally, the prepared frameworks exhibited excellent stability of dielectric properties and thermal stability over a wide temperature range.
COMPOSITES COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Felix Kuester, Sascha Brinker, Samir Lounis, Stuart S. P. Parkin, Paolo Sessi
Summary: Controlling the interaction between local spins through a superconducting condensate can lead to the combination of magnetism with superconducting technology, opening up new possibilities for innovative quantum technologies.
NATURE COMMUNICATIONS
(2021)
Article
Nanoscience & Nanotechnology
Jian Zhang, Yi Zhu, Mike Tebyetekerwa, Delong Li, Dan Liu, Weiwei Lei, Lifeng Wang, Yupeng Zhang, Yuerui Lu
Summary: Substitutional doping of monolayer transition metal dichalcogenides (TMDs) with vanadium has been successfully achieved, resulting in significant enhancement of photoluminescence (PL) intensity and dominance of exciton recombination over trion recombination. Controllable vanadium doping allows for tuning of optical bandgap of MoS2 and threshold voltage of field-effect transistors (FETs). This study demonstrates the potential for applications in optoelectronics by preparing Mo-based monolayer TMDs with controllable vanadium doping.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Nisha Dhariwal, Abu Shama Mohammad Miraz, W. J. Meng, Collin D. Wick
Summary: The effect of Al doping on the stability and shear strength of the Ti/TiN interface was examined using a modified embedded atom model. By parameterizing the model to various inter-facial properties, good agreement was found with Density Functional Theory and experimental data. The presence of Al atoms led to a more negative enthalpy and increased shear strength, especially at higher Al compositions.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Zheyue Li, Di Wu, Wanbing Gong, Jiayi Li, Shuaikang Sang, Hengjie Liu, Ran Long, Yujie Xiong
Summary: In this work, a facile and efficient strategy is demonstrated to prepare Ru-doped TiO2 photocatalyst for solar-driven CO2 methanation. The optimized Ru-TiO2-OV-50 exhibits remarkable CH4 production rate and selectivity under light illumination, outperforming commercial Ru/TiO2 and other reported catalysts. The superior performance is attributed to the synergistic effect of Ru doping and TiO2 with tunable oxygen vacancies. Light rather than thermal effect is confirmed as the main influencing factor. In addition, in situ spectroscopic technology is used to investigate the reaction pathway.
CHINESE JOURNAL OF STRUCTURAL CHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Yi Sun, Xuanzhe Liu, Yu Zhu, Yue Han, Junjie Shen, Bingbo Bao, Tao Gao, Junqing Lin, Tengli Huang, Jia Xu, Yimin Chai, Xianyou Zheng
Summary: The study developed a tunable Co-ion controlled release hydrogel by incorporating eIm/ZIF-67 into GelMA, achieving a sustained release of Co ions and promoting angiogenesis and osteogenic differentiation. The nanocomposite hydrogel showed therapeutic potential as a powerful proangiogenic/osteogenic agent for bone defect treatment, exhibiting enhanced bone formation and neovascularization abilities with good biocompatibility in vivo.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Chen Ji, Yung-Huang Chang, Chien-Sheng Huang, Bohr-Ran Huang, Yuan-Tsung Chen
Summary: Transition metal dichalcogenides have unique characteristics and potential applications in electronic devices. This study focuses on the doping behavior of WSxSey monolayers synthesized using the CVD process. Increasing the Se component leads to a transformation from p-type to n-type electronic state, while increasing the S component enhances the p-type characteristics. Raman spectra indicate n-doping behavior with a red shift in WS2-related peaks and p-doping behavior with a blue shift in WSe2-related peaks. The optical band gap of WSxSey monolayers can be precisely tuned through different chalcogenide heating temperatures.
Article
Chemistry, Multidisciplinary
Francesca Telesio, Matteo Carrega, Giulio Cappelli, Andrea Iorio, Alessandro Crippa, Elia Strambini, Francesco Giazotto, Manuel Serrano-Ruiz, Maurizio Peruzzini, Stefan Heun
Summary: We demonstrate evidence of Josephson coupling in a planar few-layer black phosphorus junction, confirming its existence and characteristics. These findings will accelerate further research on the unique properties of exfoliated black phosphorus thin flakes.
Article
Environmental Sciences
Elif Esra Altuner, Veli Cengiz Ozalp, M. Deniz Yilmaz, Muhammed Bekmezci, Fatih Sen
Summary: This study evaluated the analytical studies of Chitosan-Cobalt(II) nanoparticles and developed a selective TMB biosensor using catalytic reaction. The synthesized nanoparticles showed similar behavior to the peroxidase enzyme.
Article
Physics, Multidisciplinary
Nadia Ligato, Federico Paolucci, Elia Strambini, Francesco Giazotto
Summary: Researchers have demonstrated the phase control of heat currents by utilizing the superconducting proximity effect. They have designed a T-SQUIPT device, which consists of an aluminum nanowire embedded in a superconducting ring. By changing the magnetic flux through the ring, the phase bias can be controlled, leading to temperature modulations. The device also exhibits hysteresis in the local density of states due to phase-slip transitions, allowing it to operate as a phase-tunable thermal memory.
Article
Multidisciplinary Sciences
E. Strambini, M. Spies, N. Ligato, S. Ilic, M. Rouco, Carmen Gonzalez-Orellana, Maxim Ilyn, Celia Rogero, F. S. Bergeret, J. S. Moodera, P. Virtanen, T. T. Heikkila, F. Giazotto
Summary: Diodes are important elements in electronics and optics, and their evolution towards low dissipation electronics has led to the development of supercurrent diodes with zero resistance in one direction. In this study, researchers demonstrate a superconducting tunnel diode with zero conductance in one direction by utilizing a thin ferromagnetic insulator. This cryogenic spintronic rectifier shows promise in highly-sensitive radiation detection and future low-dissipation and fast superconducting electronics.
NATURE COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Onur Bulut, M. Deniz Yilmaz
Summary: In this study, a facile and convenient method was presented for the preparation of silver nanoparticles using quercetagetin as a reducing and stabilizing agent. The results showed that these silver nanoparticles exhibited excellent catalytic activity and could efficiently degrade a dye within a short period of time. Additionally, the silver nanoparticles demonstrated cytotoxic activity.
ACS APPLIED NANO MATERIALS
(2022)
Article
Physics, Applied
Henri Tertilt, Jesse Bakker, Marlon Becker, Bram de Wilde, Indrek Klanberg, Bernard J. Geurts, Wilfred G. van der Wiel, Andreas Heuer, Peter A. Bobbert
Summary: Based on kinetic Monte Carlo simulations, we investigate the atomic-scale mechanism of variable-range hopping of charges and propose a reconfigurable logic mechanism. The simulations show good agreement with experimental results and provide unique insights into the local electrostatic potential and current flow in the dopant network, which are crucial for the development of unconventional computing.
PHYSICAL REVIEW APPLIED
(2022)
Article
Chemistry, Multidisciplinary
Bianca Turini, Sedighe Salimian, Matteo Carrega, Andrea Iorio, Elia Strambini, Francesco Giazotto, Valentina Zannier, Lucia Sorba, Stefan Heun
Summary: We report nonreciprocal dissipation-less transport in single ballistic InSb nanoflag Josephson junctions. An inequality in supercurrent for the two opposite current propagation directions is observed by applying an in-plane magnetic field, indicating that these devices can function as Josephson diodes. The supercurrent asymmetry increases linearly with external field for small fields, saturates as the Zeeman energy becomes relevant, and then decreases to zero at higher fields. The effect is maximized when the in-plane field is perpendicular to the current vector, suggesting Rashba spin-orbit coupling as the main symmetry-breaking mechanism.
Article
Chemistry, Physical
Laura M. I. Schijven, Vittorio Saggiomo, Aldrik H. Velders, Johannes H. Bitter, Constantinos V. Nikiforidis
Summary: Researchers have discovered that solid or hollow microparticles can be formed using proteins with different aggregate sizes. By mixing proteins with CaCl2 and Na2CO3 solutions, and then adding Au3+ ions, solid and hollow protein microparticles with embedded gold nanoparticles can be fabricated. This method has a broader range of applications, including biomaterial preparation and multimodal imaging.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Spectroscopy
M. Deniz Yilmaz, Haluk Samet Kocak, Hatice Kubra Kara
Summary: A novel long wavelength monostyryl BODIPY derivative BDZ-1 was synthesized and successfully used for the high sensitivity and selectivity detection of oxalyl chloride, a highly reactive and harmful chemical. The color and fluorescence changes of BDZ-1 solution allow accurate detection of oxalyl chloride, and the practicability of BDZ-1 was further demonstrated by using a smartphone application for on-site detection.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Multidisciplinary
Sinem Altinisik, Hani Zeidan, M. Deniz Yilmaz, Mustafa E. Marti
Summary: Betaine from natural sources is still preferred over its synthetic analogue in secondary industries. In this study, reactive extraction of betaine from sugarbeet industry byproducts was investigated. Dinonylnaphthalenedisulfonic acid (DNNDSA) was used as the extraction agent, and various factors affecting betaine extraction were discussed. The results showed that reactive extraction has great potential for betaine recovery due to its high efficiency, simplicity, low energy demand, and cost.
Article
Nanoscience & Nanotechnology
Haluk Samet Kocak, Onur Bulut, M. Deniz Yilmaz
Summary: A new dicationic BODIPY-based fluorescent amphiphile with broad-spectrum antibacterial activity against both Gram-positive and Gram-negative bacteria has been synthesized. It exhibits stronger antimicrobial activity compared to benzalkonium chloride (BAC), a structurally similar disinfectant. The compound also shows antibiofilm activity against Staphylococcus epidermidis with a low minimum biofilm eradication concentration. Its interaction with bacterial cell and genomic DNA was further evaluated to understand its antibacterial mechanism.
ACS APPLIED BIO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
B. van de Ven, U. Alegre-Ibarra, P. J. Lemieszczuk, P. A. Bobbert, H. -c. Ruiz Euler, W. G. van der Wiel
Summary: Inspired by the brain's efficient information processing, any material system can be used for computation, but maximizing its computational potential is not always obvious. In this study, a dopant network processing unit (DNPU) is operated as a tuneable extreme learning machine (ELM) to optimize its performance on a non-linear classification task. The results show that a hybrid operation mode, called tuneable ELM mode, reduces the parameters needed for a vowel recognition benchmark task. This highlights the power of analog in-matter computing and the importance of designing specialized material systems for computation.
FRONTIERS IN NANOTECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
M. Victoria Gomez, Sander Baas, Aldrik H. Velders
Summary: Nuclear Magnetic Resonance (NMR) spectroscopy is a powerful technique for molecular characterization and quantification, but is limited by poor sensitivity and expensive hardware. In this study, a microfluidic NMR-chip with a single planar-spiral microcoil and photochemically induced hyperpolarization is used for multidimensional and heteronuclear NMR experiments on picomole quantities of material. This chip significantly improves sensitivity and reduces cost and hardware complexity compared to traditional instruments.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Herbert Jaeger, Beatriz Noheda, Wilfred G. G. van der Wiel
Summary: Approaching limitations of digital computing technologies have led to the exploration of neuromorphic and other unconventional computing methods. A formal theory beyond the classical symbolic-algorithmic Turing machine theory is needed to systematically engineer unconventional computing systems. This article proposes a general strategy for developing such a theory, particularly focusing on a bottom-up approach called fluent computing, which models physical computing systems based on what can be measured. The authors emphasize the challenges in learning from human brains to create powerful computers due to the absence of a guiding computing theory.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Zachary Heywood, Joshua Mallinson, Edoardo Galli, Susant Acharya, Saurabh Bose, Matthew Arnold, Philip Bones, Simon Brown
Summary: The potential of self-organised nanoscale networks in neuromorphic computing systems is investigated, and it is found that devices with multiple electrodes maintain criticality. A formalism for analyzing the number of dominant paths through the network is also developed.
NEUROMORPHIC COMPUTING AND ENGINEERING
(2022)
