Monthly Notices is one of the three largest general primary astronomical research publications. It is an international journal, published by the Royal Astronomical Society. This article 1 describes its publication policy and practice.

Monthly Notices of the Royal Astronomical Society

The impact-induced deposition of Al13 clusters with icosahedral structure on Ni(0 0 1) surface was studied by molecular dynamics (MD) simulation using Finnis–Sinclair potentials. The incident kinetic energy (Ein) ranged from 0.01 to 30 eV per atom. The structural and dynamical properties of Al clusters on Ni surfaces were found to be strongly dependent on the impact energy. At much lower energy, the Al cluster deposited on the surface as a bulk molecule. However, the original icosahedral structure was transformed to the fcc-like one due to the interaction and the structure mismatch between the Al cluster and Ni surface. With increasing the impinging energy, the cluster was deformed severely when it contacted the substrate, and then broken up due to dense collision cascade. The cluster atoms spread on the surface at last. When the impact energy was higher than 11 eV, the defects, such as Al substitutions and Ni ejections, were observed. The simulation indicated that there exists an optimum energy range, which is suitable for Al epitaxial growth in layer by layer. In addition, at higher impinging energy, the atomic exchange between Al and Ni atoms will be favourable to surface alloying.

Nuclear instruments and methods in physics research section B : beam interactions with materials and atoms

Ices In The Solar System

Reduction of amorphous carbon clusters from the highly disordered and reduced graphene oxide NPs by acoustical shock waves — Towards the formation of highly ordered graphene

The excessive or illegal use of organophosphorus pesticides (OPs) in agriculture has led to potential residue problems, making it essential to develop an effective analytical method. As reliable and rapid analytical methods, biosensors open an avenue for OP detection. However, traditional biosensors mainly depend on bio-recognition elements, consequently limiting their practical application. To address these issues, nanozymes have been widely applied because of their low cost, excellent stability, and favorable catalytic activity. This review summarizes the related research progress of nanozyme-based biosensors for OP detection in the last six years (2018–2023). The structural classification, catalytic activity, and biosensing strategy are discussed. Emphatically, this paper introduces the practical applications of nanozyme-enabled biosensors in the direction of simple operation, low cost, and on-site detection, such as optical and electrochemical biosensors. Finally, the main challenges and future trends are prospected, which could provide theoretical references for nanozyme-based biosensors in OP detection. 

Nanozyme-based biosensor for organophosphorus pesticide monitoring: Functional design, biosensing strategy, and detection application

Icy mantles of benzonitrile, an aromatic with a cyanide side chain that has recently been detected in the interstellar medium, were subjected to vacuum ultraviolet photon irradiation and found to form a residue. The residue was removed from the substrate and placed on a Quantifoil grid for electron microscopy analysis. Transmission electron microscopy showed Quantum Dot (QD) and Nitrogen-doped Graphene (N-Graphene) sheets. Diffraction and Energy Dispersive X-ray Spectroscopy revealed the crystalline nature and carbon-nitrogen composition, of the observed graphene sheet. This is the first result showing QD and N-Graphene synthesis in ice irradiation at interstellar temperatures.

M Ambresh

Papers

N-Graphene Synthesized in Astrochemical Ices

Shock Processing of Amorphous Carbon Nanodust