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5 results on '"Bondon"'

1. Chemical bonding as quantum tunneling: The Capra bondons.

Author

Putz, Mihai V.

Subjects
*QUANTUM tunneling, *CHEMICAL bonds, *BRILLOUIN zones, *CHEMICAL structure, *WAVE functions, *TUNNEL design & construction, *KNOWLEDGE gap theory
Abstract

The chemical bonding phenomenology is approached through the quantum tunneling rather than by the fashioned quantum wave function superposition/interference. It provides a complete covering character of the nano-space for topological chemical structures, which otherwise geometrically feature the space-gaps. The covering completion is actually recovered by the quasi-particle bondon as the information agent in filling the potential gaps of both asymmetrically and symmetrically extended or generally topologically reduced chemical structures. In such a context, we found that Prof. Diudea's Capra topological operation provides the bondonic quantum pentagulation, which resembles the nano-topological analogue of the Wigner-Seitz primitive in periodic lattices, while also establishing the direct connection with the reciprocal k-space of wave-vectors and with the allied Brillouin zones of electronic (bosonic) condensation. [ABSTRACT FROM AUTHOR]

Published
2022
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4. Photosensitivity of Different Nanodiamond–PMO Nanoparticles in Two-Photon-Excited Photodynamic Therapy

Author

Nicolas Bondon, Denis Durand, Kamel Hadj-Kaddour, Lamiaa M. A. Ali, Rabah Boukherroub, Nadir Bettache, Magali Gary-Bobo, Laurence Raehm, Jean-Olivier Durand, Christophe Nguyen, Clarence Charnay, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM), Université de Montpellier (UM), Institut des Biomolécules Max Mousseron [Pôle Chimie Balard] (IBMM), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), NanoBioInterfaces - IEMN (NBI - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), We acknowledge the imaging facility MRI, member of the France-BioImaging national infrastructure, supported by the French National Research Agency (ANR-10-INBS-04, 'Investments for the future') and Erwan Olivieiro from the MEA platform, Université de Montpellier, for the STEM-EDX experiments. ANR-19-CE09-0034 MSN-2hv, ANR-19-CE09-0034,MSN-2hv,Matériaux théranostiques associant les fonctionnalités d'imagerie 2 photons et de thérapie photodynamique pour le ciblage de bactéries et le contrôle des infections lors de la cicatrisation(2019), ANR-10-INBS-0004,France-BioImaging,Développment d'une infrastructure française distribuée coordonnée(2010), Unité Mixte de Recherche sur les Herbivores - UMR 1213 (UMRH), VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and We acknowledge the imaging facility MRI, member of the France-BioImaging national infrastructure, supported by the French National Research Agency (ANR-10-INBS-04, 'Investments for the future') and Erwan Olivieiro from the MEA platform, Université de Montpellier, for the STEM-EDX experiments.ANR-19-CE09-0034 MSN-2hv

Subjects
K. Ali, R. Bettache, theranostics, J.-O. Nguyen, Hadj-Kaddour, Gary-Bobo, K, J.-O, [SDV.CAN]Life Sciences [q-bio]/Cancer, L.M.A, Bondon, Raehm, General Biochemistry, Genetics and Molecular Biology, M, [SPI]Engineering Sciences [physics], C, et al nanodiamond, Boukherroub, N. Durand, nanodiamond, two-photon excitation, mesoporous organosilica, cancer cells, Durand, L. Durand, Bettache, Ecology, Evolution, Behavior and Systematics, R, D. Hadj-Kaddour, Paleontology, L.M.A. Boukherroub, [CHIM.MATE]Chemical Sciences/Material chemistry, N, L, N. Gary-Bobo, Ali, M. Raehm, Space and Planetary Science, C. et al nanodiamond two-photon excitation mesoporous organosilica theranostics cancer cells, D, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, Nguyen
Abstract

Background: In addition to their great optical properties, nanodiamonds (NDs) have recently proved useful for two-photon-excited photodynamic therapy (TPE-PDT) applications. Indeed, they are able to produce reactive oxygen species (ROS) directly upon two-photon excitation but not with one-photon excitation; Methods: Fluorescent NDs (FNDs) with a 100 nm diameter and detonation NDs (DNDs) of 30 nm were compared. In order to use the gems for cancer-cell theranostics, they were encapsulated in a bis(triethoxysilyl)ethylene-based (ENE) periodic mesoporous organosilica (PMO) shell, and the surface of the formed nanoparticles (NPs) was modified by the direct grafting of polyethylene glycol (PEG) and amino groups using PEG-hexyltriethoxysilane and aminoundecyltriethoxysilane during the sol–gel process. The NPs’ phototoxicity and interaction with MDA-MB-231 breast cancer cells were evaluated afterwards; Results: Transmission electronic microscopy images showed the formation of core–shell NPs. Infrared spectra and zeta-potential measurements confirmed the grafting of PEG and NH2 groups. The encapsulation of the NDs allowed for the imaging of cancer cells with NDs and for the performance of TPE-PDT of MDA-MB-231 cancer cells with significant mortality. Conclusions: Multifunctional ND@PMO core–shell nanosystems were successfully prepared. The NPs demonstrated high biocompatibility and TPE-PDT efficiency in vitro in the cancer cell model. Such systems hold good potential for two-photon-excited PDT applications.

Published
2022

5. Cooperative topological accumulation of vacancies in honeycomb lattices.

Author

Ori, Ottorino, Cataldo, Franco, Putz, Mihai V., Kaatz, Forrest, and Bultheel, Adhemar

Subjects
*TOPOLOGY, *VACANCIES in crystals, *HONEYCOMB structures, *CRYSTAL lattices, *GRAPHENE, *SELF-healing materials
Abstract

Present topological study focuses on the formation mechanism of clusters of vacancies in graphenic layers. An original effect that explains bothaccumulationandself-healingof vacancies represents the original outcome of our investigation whose results, based on the long-range topological properties of the honeycomb lattices, are applicable to defective graphene sheets and general honeycomb lattices when other elements other than carbon are present. Some speculations about the role of long-range bondonic states in such a kind of lattices contribute to the understanding of electronic and transport properties in graphenic nanomaterials. [ABSTRACT FROM AUTHOR]

Published
2016
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