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Sari H, Putri HH, Paksi PW, Hidayat G, Amelia SR, Sundari CDD, Rachmawati H, Ivansyah AL, Muttaqien F, Iskandar F. Theoretical Investigation of the Green-Synthesized Carbon-Based Nanomaterial Potential as Inhibitors of ACE2 for Blocking SARS-CoV-2 Binding. ACS OMEGA 2024; 9:16701-16715. [PMID: 38617634 PMCID: PMC11007854 DOI: 10.1021/acsomega.4c00759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/01/2024] [Accepted: 03/12/2024] [Indexed: 04/16/2024]
Abstract
Since the emergence of SARS-CoV-2 in 2020, the world has faced a global pandemic, emphasizing the urgent need for effective treatments to combat COVID-19. This study explores the use of green-synthesized carbon-based nanomaterials as potential inhibitors of ACE2, a critical receptor for SARS-CoV-2 entry into host cells. Specifically, the study examines four carbon-based nanomaterials, namely, CD1, CD2, CD3, and CD4 in amino, graphitic, pyridinic, and pyrrolic forms, respectively, synthesized from curcumin, to investigate their binding affinity with ACE2. Molecular docking studies revealed that CD3 (pyridinic form) exhibited the highest binding affinity with ACE2, surpassing that of the control compound, curcumin. Notably, CD3 formed hydrophobic interactions and hydrogen bonds with key ACE2 residues, suggesting its potential to block the binding of SARS-CoV-2 to human cells. Moreover, molecular dynamics simulations demonstrated the stability of these ligand-ACE2 complexes, further supporting the promise of CD3 as an inhibitor. Quantum chemical analyses, including frontier molecular orbitals, natural bond orbital analysis, and the quantum theory of atoms in molecules, unveiled valuable insights into the reactivity and interaction strengths of these ligands. CD3 exhibited desirable chemical properties, signifying its suitability for therapeutic development. The study's findings suggest that green-synthesized carbon-based nanomaterials, particularly CD3, have the potential to serve as effective inhibitors of ACE2, offering a promising avenue for the development of treatments against COVID-19. Further experimental validation is warranted to advance these findings and establish new therapies for the ongoing global pandemic.
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Affiliation(s)
- Harsiwi
Candra Sari
- Master
Program in Computational Science, Faculty of Mathematics and Natural
Sciences, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, West Java 40132, Indonesia
| | - Haliza Hasnia Putri
- Master
Program in Computational Science, Faculty of Mathematics and Natural
Sciences, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, West Java 40132, Indonesia
| | - Pinantun Wiguna
Kusuma Paksi
- Master
Program in Computational Science, Faculty of Mathematics and Natural
Sciences, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, West Java 40132, Indonesia
| | - Gabriel Hidayat
- Master
Program in Computational Science, Faculty of Mathematics and Natural
Sciences, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, West Java 40132, Indonesia
| | - Silmi Rahma Amelia
- Master
Program in Computational Science, Faculty of Mathematics and Natural
Sciences, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, West Java 40132, Indonesia
| | - Citra Deliana Dewi Sundari
- Department
of Chemistry, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, West Java 40132, Indonesia
- Chemistry
Education, Universitas Islam Negeri Sunan
Gunung Djati Bandung, Jl. A. H. Nasution No. 105, Bandung, West Java 40614, Indonesia
| | - Heni Rachmawati
- School
of Pharmacy, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, West Java 40132, Indonesia
- Research
Center for Nanosciences and Nanotechnology, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, West Java 40132, Indonesia
| | - Atthar Luqman Ivansyah
- Master
Program in Computational Science, Faculty of Mathematics and Natural
Sciences, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, West Java 40132, Indonesia
- Department
of Physics, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, West Java 40132, Indonesia
| | - Fahdzi Muttaqien
- Master
Program in Computational Science, Faculty of Mathematics and Natural
Sciences, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, West Java 40132, Indonesia
- Department
of Physics, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, West Java 40132, Indonesia
| | - Ferry Iskandar
- Research
Center for Nanosciences and Nanotechnology, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, West Java 40132, Indonesia
- Department
of Physics, Institut Teknologi Bandung, Jalan Ganesha 10, Bandung, West Java 40132, Indonesia
- Collaboration
Research Center for Advanced Energy Materials, National Research and Innovation Agency - Institut Teknologi Bandung, Jl. Ganesha 10∇, Bandung 40132, Indonesia
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Aguiar C, Dattani N, Camps I. Electronic and structural properties of Möbius boron-nitride and carbon nanobelts. DISCOVER NANO 2024; 19:63. [PMID: 38589649 PMCID: PMC11001837 DOI: 10.1186/s11671-024-03967-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2023] [Accepted: 01/24/2024] [Indexed: 04/10/2024]
Abstract
For the development of nanofilters and nanosensors, we wish to know the impact of size on their geometric, electronic, and thermal stabilities. Using the semiempirical tight binding method as implemented in the xTB program, we characterized Möbius boron-nitride and carbon-based nanobelts with different sizes and compared them to each other and to normal nanobelts. The calculated properties include the infrared spectra, the highest occupied molecular orbital (HOMO), the lowest unoccupied molecular orbital (LUMO), the energy gap, the chemical potential, and the molecular hardness. The agreement between the peak positions from theoretical infrared spectra compared with experimental ones for all systems validates the methodology that we used. Our findings show that for the boron-nitride-based nanobelts, the calculated properties have an opposite monotonic relationship with the size of the systems, whereas for the carbon-based nanobelts, the properties show the same monotonic relationship for both types of nanobelts. Also, the torsion presented on the Möbius nanobelts, in the case of boron-nitride, induced an inhomogeneous surface distribution for the HOMO orbitals. High-temperature molecular dynamics also allowed us to contrast carbon-based systems with boron-nitride systems at various temperatures. In all cases, the properties vary with the increase in size of the nanobelts, indicating that it is possible to choose the desired values by changing the size and type of the systems. This work has many implications for future studies, for example our results show that carbon-based nanobelts did not break as we increased the temperature, whereas boron-nitride nanobelts had a rupture temperature that varied with their size; this is a meaningful result that can be tested when the use of more accurate simulation methods become practical for such systems in the future.
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Affiliation(s)
- C Aguiar
- Laboratório de Modelagem Computacional - LaModel, Instituto de Ciências Exatas - ICEx, Universidade Federal de Alfenas - UNIFAL-MG, Alfenas, Minas Gerais, Brazil
| | - N Dattani
- HPQC College, Waterloo, Canada.
- HPQC Labs, Waterloo, Canada.
| | - I Camps
- Laboratório de Modelagem Computacional - LaModel, Instituto de Ciências Exatas - ICEx, Universidade Federal de Alfenas - UNIFAL-MG, Alfenas, Minas Gerais, Brazil.
- HPQC Labs, Waterloo, Canada.
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Slepičková Kasálková N, Rimpelová S, Vacek C, Fajstavr D, Švorčík V, Sajdl P, Slepička P. Surface activation of Hastalex by vacuum argon plasma for cytocompatibility enhancement. Heliyon 2024; 10:e27816. [PMID: 38510028 PMCID: PMC10951612 DOI: 10.1016/j.heliyon.2024.e27816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 03/06/2024] [Accepted: 03/07/2024] [Indexed: 03/22/2024] Open
Abstract
Here, we present surface analysis and biocompatibility evaluation of novel composite material based on graphene oxide traded as Hastalex. First, the surface morphology and elemental analysis of the pristine material were examined by atomic force and scanning electron microscopies, and by energy-dispersive and X-ray photoelectron spectroscopies, respectively. The Hastalex surface was then modified by plasma (3 and 8 W with exposure times up to 240 s), the impact of which on the material surface wettability and morphology was further evaluated. In addition, the material aging was studied at room and elevated temperatures. Significant changes in surface roughness, morphology, and area were detected at the nanometer scale after plasma exposure. An increase in oxygen content due to the plasma exposure was observed both for 3 and 8 W. The plasma treatment had an outstanding effect on the cytocompatibility of Hastalex foil treated at both input powers of 3 and 8 W. The cell number of human MRC-5 fibroblasts on Hastalex foils exposed to plasma increased significantly compared to pristine Hastalex and even to tissue culture polystyrene. The plasma exposure also affected the fibroblasts' cell growth and shape.
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Affiliation(s)
- Nikola Slepičková Kasálková
- Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Silvie Rimpelová
- Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Cyril Vacek
- Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Dominik Fajstavr
- Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Václav Švorčík
- Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Petr Sajdl
- Department of Power Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Petr Slepička
- Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
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Abu Lila AS, Bhattacharya R, Moin A, Al Hagbani T, Abdallah MH, Danish Rizvi SM, Khafagy ES, Hussain T, Gangadharappa HV. Dual targeting multiwalled carbon nanotubes for improved neratinib delivery in breast cancer. RSC Adv 2023; 13:24309-24318. [PMID: 37583664 PMCID: PMC10424192 DOI: 10.1039/d3ra04732f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 08/08/2023] [Indexed: 08/17/2023] Open
Abstract
The aim of this study was to develop biotinylated chitosan (Bio-Chi) decorated multi-walled carbon nanotubes (MWCNTs) for breast cancer therapy with the tyrosine kinase inhibitor, neratinib (NT). For achieving such a purpose, carboxylic acid functionalized multiwalled carbon nanotubes (c-MWCNTs) were initially decorated non-covalently with biotin-chitosan (Bio-Chi) coating for achieving a dual targeting mode; pH-dependent release with chitosan and biotin-receptor mediated active targeting with biotin. Afterwards, Bio-Chi decorated c-MWCNTs were loaded with the tyrosine kinase inhibitor, neratinib (NT). The formulation was then characterized by dynamic light scattering, FTIR and EDX. The drug loading efficiency was estimated to be 95.6 ± 1.2%. In vitro drug release studies revealed a pH-dependent release of NT from Bio-Chi decorated c-MWCNTs, with a higher drug release under acidic pH conditions. Sulforhodamine B (SRB) cytotoxicity assay of different NT formulations disclosed dose-dependent cytotoxicities against SkBr3 cell line, with a superior cytotoxicity observed with NT-loaded Bio-Chi-coated c-MWCNTs, compared to either free NT or NT-loaded naked c-MWCNTs. The IC50 values for free NT, NT-loaded c-MWCNTs and NT-loaded Bio-Chi-coated c-MWCNTs were 548.43 ± 23.1 μg mL-1, 319.55 ± 17.9 μg mL-1, and 257.75 ± 24.5 μg mL-1, respectively. Interestingly, competitive cellular uptake studies revealed that surface decoration of drug-loaded c-MWCNTs with Bio-Chi permitted an enhanced uptake of c-MWCNTs by breast cancer cells, presumably, via biotin receptors-mediated endocytosis. To sum up, Bio-Chi-decorated c-MWCNTs might be a promising delivery vehicle for mediating cell-specific drug delivery to breast cancer cells.
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Affiliation(s)
- Amr Selim Abu Lila
- Department of Pharmaceutics, College of Pharmacy, University of Ha'il Ha'il 81442 Saudi Arabia
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Zagazig University Zagazig 44519 Egypt
| | - Rohini Bhattacharya
- Department of Pharmaceutics, JSS College of Pharmacy, JSS Academy of Higher Education and Research Mysuru 570015 India
| | - Afrasim Moin
- Department of Pharmaceutics, College of Pharmacy, University of Ha'il Ha'il 81442 Saudi Arabia
| | - Turki Al Hagbani
- Department of Pharmaceutics, College of Pharmacy, University of Ha'il Ha'il 81442 Saudi Arabia
| | - Marwa Helmy Abdallah
- Department of Pharmaceutics, College of Pharmacy, University of Ha'il Ha'il 81442 Saudi Arabia
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Zagazig University Zagazig 44519 Egypt
| | - Syed Mohd Danish Rizvi
- Department of Pharmaceutics, College of Pharmacy, University of Ha'il Ha'il 81442 Saudi Arabia
| | - El-Sayed Khafagy
- Department of Pharmaceutics, College of Pharmacy, Prince Sattam Bin Abdulaziz University Al-kharj 11942 Saudi Arabia
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Suez Canal University Ismailia 41522 Egypt
| | - Talib Hussain
- Department of Pharmacology and Toxicology, College of Pharmacy, University of Ha'il Ha'il 81442 Saudi Arabia
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Pabba DP, Satthiyaraju M, Ramasdoss A, Sakthivel P, Chidhambaram N, Dhanabalan S, Abarzúa CV, Morel MJ, Udayabhaskar R, Mangalaraja RV, Aepuru R, Kamaraj SK, Murugesan PK, Thirumurugan A. MXene-Based Nanocomposites for Piezoelectric and Triboelectric Energy Harvesting Applications. MICROMACHINES 2023; 14:1273. [PMID: 37374858 DOI: 10.3390/mi14061273] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 06/17/2023] [Accepted: 06/18/2023] [Indexed: 06/29/2023]
Abstract
Due to its superior advantages in terms of electronegativity, metallic conductivity, mechanical flexibility, customizable surface chemistry, etc., 2D MXenes for nanogenerators have demonstrated significant progress. In order to push scientific design strategies for the practical application of nanogenerators from the viewpoints of the basic aspect and recent advancements, this systematic review covers the most recent developments of MXenes for nanogenerators in its first section. In the second section, the importance of renewable energy and an introduction to nanogenerators, major classifications, and their working principles are discussed. At the end of this section, various materials used for energy harvesting and frequent combos of MXene with other active materials are described in detail together with the essential framework of nanogenerators. In the third, fourth, and fifth sections, the materials used for nanogenerators, MXene synthesis along with its properties, and MXene nanocomposites with polymeric materials are discussed in detail with the recent progress and challenges for their use in nanogenerator applications. In the sixth section, a thorough discussion of the design strategies and internal improvement mechanisms of MXenes and the composite materials for nanogenerators with 3D printing technologies are presented. Finally, we summarize the key points discussed throughout this review and discuss some thoughts on potential approaches for nanocomposite materials based on MXenes that could be used in nanogenerators for better performance.
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Affiliation(s)
- Durga Prasad Pabba
- Departamento de Mecánica, Facultad de Ingeniería, Universidad Tecnologica Metropolitana, Santiago 8330378, Chile
| | - Mani Satthiyaraju
- Department of Mechanical Engineering, Kathir College of Engineering, Coimbatore 641062, India
| | - Ananthakumar Ramasdoss
- School for Advanced Research in Polymers (SARP), Central Institute of Petrochemicals Engineering & Technology (CIPET), T.V.K. Industrial Estate, Guindy, Chennai 600032, India
| | - Pandurengan Sakthivel
- Centre for Materials Science, Department of Physics, Faculty of Engineering, Karpagam Academy of Higher Education, Coimbatore 641021, India
| | - Natarajan Chidhambaram
- Department of Physics, Rajah Serfoji Government College (Autonomous), Thanjavur 613005, India
| | - Shanmugasundar Dhanabalan
- Functional Materials and Microsystems Research Group, RMIT University, Melbourne, VIC 3000, Australia
| | | | - Mauricio J Morel
- Departamento de Química y Biología, Facultad de Ciencias Naturales, Universidad de Atacama, Copiapó 1531772, Chile
| | - Rednam Udayabhaskar
- Departamento de Mecánica, Facultad de Ingeniería, Universidad Tecnologica Metropolitana, Santiago 8330378, Chile
| | | | - Radhamanohar Aepuru
- Departamento de Mecánica, Facultad de Ingeniería, Universidad Tecnologica Metropolitana, Santiago 8330378, Chile
| | - Sathish-Kumar Kamaraj
- Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada, Unidad Altamira (CICATA Altamira), Altamira 89600, Mexico
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Anjalikrishna PK, Gadre SR, Suresh CH. Electrostatic Potential for Exploring Electron Delocalization in Infinitenes, Circulenes, and Nanobelts. J Org Chem 2023; 88:4123-4133. [PMID: 36952587 DOI: 10.1021/acs.joc.2c02507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/25/2023]
Abstract
The π-conjugation, aromaticity, and stability of the newly synthesized 12-infinitene and of other infinitenes comprising 8-, 10-, 14-, and 16-arene rings are investigated using density functional theory. The π-electron delocalization and aromatic character rooted in infinitenes are quantified in terms of molecular electrostatic potential (MESP) topology. Structurally, the infinitene bears a close resemblance of its helically twisted structure to the infinity symbol. The MESP topology shows that infinitene possesses an infinity-shaped delocalization of the electron density that streams over the fused benzenoid rings. The parameter ∑i=13Δλi, derived from the eigenvalues (λi) corresponding to the MESP minima, is used for quantifying the aromatic character of arene rings of infinitene. The structure, stability, and MESP topology features of 8-, 10-, 12-, 14-, and 16-infinitenes are also compared with the corresponding isomeric circulenes and carbon nanobelts. Further, the strain in all such systems is evaluated by considering the respective isomeric planar benzenoid hydrocarbons as reference systems. The 12-infinitene turns out to be the most aromatic and the least strained among all the systems examined.
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Affiliation(s)
- Puthannur K Anjalikrishna
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019, Kerala, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Shridhar R Gadre
- Department of Scientific Computing, Modelling and Simulation, Savitribai Phule Pune University, Pune 411007, India
| | - Cherumuttathu H Suresh
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695019, Kerala, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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Hurtuková K, Slepičková Kasálková N, Fajstavr D, Lapčák L, Švorčík V, Slepička P. High-Energy Excimer Annealing of Nanodiamond Layers. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:557. [PMID: 36770517 PMCID: PMC9921808 DOI: 10.3390/nano13030557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 01/27/2023] [Accepted: 01/28/2023] [Indexed: 06/18/2023]
Abstract
Here, we aimed to achieve exposure of a nanodiamond layer to a high-energy excimer laser. The treatment was realized in high-vacuum conditions. The carbon, in the form of nanodiamonds (NDs), underwent high-temperature changes. The induced changes in carbon form were studied with Raman spectroscopy, X-ray photoelectron spectroscopy, and X-ray diffraction (XRD) and we searched for the Q-carbon phase in the prepared structure. Surface morphology changes were detected by atomic force microscopy (AFM) and scanning electron microscopy (SEM). NDs were exposed to different laser energy values, from 1600 to 3000 mJ cm-2. Using the AFM and SEM methods, we found that the NDs layer was disrupted with increasing beam energy, to create a fibrous structure resembling Q-carbon fibers. Layered micro-/nano-spheres, representing the role of diamonds, were created at the junction of the fibers. A Q-carbon structure (fibers) consisting of 80% sp3 hybridization was prepared by melting and quenching the nanodiamond film. Higher energy values of the laser beam (2000 and 3000 mJ cm-2), in addition to oxygen bonds, also induced carbide bonds characteristic of Q-carbon. Raman spectroscopy confirmed the presence of a diamond (sp3) phase and a low-intensity graphitic (G) peak occurring in the Q-carbon form samples.
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Affiliation(s)
- Klaudia Hurtuková
- Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Nikola Slepičková Kasálková
- Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Dominik Fajstavr
- Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Ladislav Lapčák
- Central Laboratories, University of Chemistry and Technology, 166 28 Prague, Czech Republic
| | - Václav Švorčík
- Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
| | - Petr Slepička
- Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic
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Nair RV, Puthiyaparambath MF, Chatanathodi R, Nair LV, Jayasree RS. A nanoarchitecture of a gold cluster conjugated gold nanorod hybrid system and its application in fluorescence imaging and plasmonic photothermal therapy. NANOSCALE 2022; 14:13561-13569. [PMID: 36073600 DOI: 10.1039/d2nr03163a] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Engineering different nanomaterials into a single functional material can impart unique properties of the parental nanoparticles, especially in the field of bio imaging and therapy. Gold nanomaterials having different sizes, shapes and dimensionalities exhibit exceptional properties apart from their non-toxicity and hence are strong candidates in the biomedical field. Designing a hybrid nanomaterial of two gold nanostructures retaining the individual properties of the parental nanomaterials is challenging. Here, we demonstrate the synthesis of a hybrid nanomaterial (GQC@GNR), comprising an extremely small gold nanocluster and a representative of the asymmetric gold nanostructure, i.e., a gold nanorod, both having their own different exclusive optical properties like tuneable emission and NIR absorption characteristics, respectively. The hybrid system is designed to retain its emission and absorption in the NIR region to use it as an agent for simultaneous imaging and therapy. The formation of GQC@GNR and its architectonics heavily depend on the synthesis route and the parameters adopted which in turn have a direct influence on its properties. The architecture and its connection to the optical properties are explained using UV-Vis absorption and photoluminescence spectroscopy, zeta potential, transmission electron microscopy, etc. DFT-based computational modelling supports architectonics as explained by the experimental findings. The formation of the gold-gold hybrid system witnessed interesting science with a strong indication that materials with desired properties can be designed by appropriately modulating the architectonics of hybrid formation. Finally, folate conjugated GQC@GNR demonstrated its efficacy for targeted imaging and photothermal therapy in HeLa cells and tumor-bearing animal models. The detailed therapeutic efficacy of GQC@GNR is also explained based on Raman spectroscopy.
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Affiliation(s)
- Resmi V Nair
- Division of Biophotonics and Imaging, Sree Chitra Tirunal Institute of Medical Sciences and Technology, Trivandrum, 695012, India.
- School of Materials Science and Engineering, National Institute of Technology Calicut, 673601, Kerala, India.
| | | | - Raghu Chatanathodi
- Department of Physics, National Institute of Technology Calicut, Kerala, India
| | - Lakshmi V Nair
- School of Materials Science and Engineering, National Institute of Technology Calicut, 673601, Kerala, India.
| | - Ramapurath S Jayasree
- Division of Biophotonics and Imaging, Sree Chitra Tirunal Institute of Medical Sciences and Technology, Trivandrum, 695012, India.
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9
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Bobenko N, Egorushkin V, Ponomarev A. Hysteresis in Heat Capacity of MWCNTs Caused by Interface Behavior. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3139. [PMID: 36144926 PMCID: PMC9503709 DOI: 10.3390/nano12183139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 08/31/2022] [Accepted: 09/08/2022] [Indexed: 06/16/2023]
Abstract
The paper is concerned with the study of structural disorder as well as the emergence and causes of heat capacity hysteresis in multiwall carbon nanotubes. The investigation methods are X-ray diffraction analysis, Raman spectroscopy, transmission electron microscopy, and calorimetric tests: thermogravimetric analysis, differential scanning calorimetry, and the thermal relaxation method for heat capacity hysteresis. Multiwall carbon nanotubes are shown to be composed of one or several types of zigzag-armchair domains. The domain structure of nanotube samples is responsible for the generation of uniaxial elastic microstrains and viscoelastic bending strains at domain interfaces. The thermomechanical behavior of interfaces is the chief cause of temperature hysteresis of heat capacity. The number of hystereses corresponds to the number of domain types in the structure, and values of hysteresis are determined by the crystallite size, thermal conductivity, and normal temperature distribution of strain. The found mechanism of heat capacity hysteresis can be helpful in preventing jumps in thermal properties and managing thermal memory in multiwall carbon nanotubes.
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Hurtuková K, Vašinová T, Kasálková NS, Fajstavr D, Rimpelová S, Pavlíčková VS, Švorčík V, Slepička P. Antibacterial Properties of Silver Nanoclusters with Carbon Support on Flexible Polymer. NANOMATERIALS 2022; 12:nano12152658. [PMID: 35957089 PMCID: PMC9370165 DOI: 10.3390/nano12152658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 07/30/2022] [Accepted: 07/31/2022] [Indexed: 12/10/2022]
Abstract
Here, we aimed at the preparation of an antibacterial surface on a flexible polydimethylsiloxane substrate. The polydimethylsiloxane surface was sputtered with silver, deposited with carbon, heat treated and exposed to excimer laser, and the combinations of these steps were studied. Our main aim was to find the combination of techniques applicable both against Gram-positive and Gram-negative bacteria. The surface morphology of the structures was determined by atomic force microscopy and scanning electron microscopy. Changes in surface chemistry were conducted by application of X-ray photoelectron spectroscopy and energy dispersive spectroscopy. The changes in surface wettability were characterized by surface free energy determination. The heat treatment was also applied to selected samples to study the influence of the process on layer stability and formation of PDMS-Ag or PDMS-C-Ag composite layer. Plasmon resonance effect was determined for as-sputtered and heat-treated Ag on polydimethylsiloxane. The heating of such structures may induce formation of a pattern with a surface plasmon resonance effect, which may also significantly affect the antibacterial activity. We have implemented sputtering of the carbon base layer in combination with excimer laser exposure of PDMS/C/Ag to modify its properties. We have confirmed that deposition of primary carbon layer on PDMS, followed by sputtering of silver combined with subsequent heat treatment and activation of such surface with excimer laser, led to the formation of a surface with strong antibacterial properties against two bacterial strains of S. epidermidis and E. coli.
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Affiliation(s)
- Klaudia Hurtuková
- Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic; (K.H.); (T.V.); (N.S.K.); (D.F.); (V.Š.)
| | - Tereza Vašinová
- Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic; (K.H.); (T.V.); (N.S.K.); (D.F.); (V.Š.)
| | - Nikola Slepičková Kasálková
- Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic; (K.H.); (T.V.); (N.S.K.); (D.F.); (V.Š.)
| | - Dominik Fajstavr
- Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic; (K.H.); (T.V.); (N.S.K.); (D.F.); (V.Š.)
| | - Silvie Rimpelová
- Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic; (S.R.); (V.S.P.)
| | - Vladimíra Svobodová Pavlíčková
- Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic; (S.R.); (V.S.P.)
| | - Václav Švorčík
- Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic; (K.H.); (T.V.); (N.S.K.); (D.F.); (V.Š.)
| | - Petr Slepička
- Department of Solid State Engineering, University of Chemistry and Technology Prague, 166 28 Prague, Czech Republic; (K.H.); (T.V.); (N.S.K.); (D.F.); (V.Š.)
- Correspondence:
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11
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Carbon Transformation Induced by High Energy Excimer Treatment. MATERIALS 2022; 15:ma15134614. [PMID: 35806736 PMCID: PMC9267606 DOI: 10.3390/ma15134614] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 06/27/2022] [Accepted: 06/28/2022] [Indexed: 01/09/2023]
Abstract
The main aim of this study was to describe the treatment of carbon sheet with a high-energy excimer laser. The excimer modification changed the surface chemistry and morphology of carbon. The appearance of specific carbon forms and modifications have been detected due to exposure to laser beam fluencies up to 8 J cm−2. High fluence optics was used for dramatic changes in the carbon layer with the possibility of Q-carbon formation; a specific amorphous carbon phase was detected with Raman spectroscopy. The changes in morphology were determined with atomic force microscopy and confirmed with scanning electron microscopy, where the partial formation of the Q-carbon phase was detected. Energy dispersive spectroscopy (EDS) was applied for a detailed study of surface chemistry. The particular shift of functional groups induced on laser-treated areas was determined by X-ray photoelectron spectroscopy. For the first time, high-dose laser exposure successfully induced a specific amorphous carbon phase.
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12
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Recent Advances of Nanomaterials-Based Molecularly Imprinted Electrochemical Sensors. NANOMATERIALS 2022; 12:nano12111913. [PMID: 35683768 PMCID: PMC9182195 DOI: 10.3390/nano12111913] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 05/27/2022] [Accepted: 05/30/2022] [Indexed: 02/06/2023]
Abstract
Molecularly imprinted polymer (MIP) is illustrated as an analogue of a natural biological antibody-antigen system. MIP is an appropriate substrate for electrochemical sensors owing to its binding sites, which match the functional groups and spatial structure of the target analytes. However, the irregular shapes and slow electron transfer rate of MIP limit the sensitivity and conductivity of electrochemical sensors. Nanomaterials, famous for their prominent electron transfer capacity and specific surface area, are increasingly employed in modifications of MIP sensors. Staying ahead of traditional electrochemical sensors, nanomaterials-based MIP sensors represent excellent sensing and recognition capability. This review intends to illustrate their advances over the past five years. Current limitations and development prospects are also discussed.
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Carbon Structures and Tribological Properties of Fe-C-SiC Self-Lubricating Metal Matrix Composites Prepared with α/β-SiC Polytypes. LUBRICANTS 2022. [DOI: 10.3390/lubricants10060112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Sintered iron-based self-lubricant composites in which graphite reservoirs are generated by the dissociation of silicon carbide (SiC) particles feature low friction coefficients and scuffing resistance combined with high mechanical stress. This work evaluated the influence of the sintering temperature and the SiC polytype on the graphite reservoirs morphology, structure, and friction behaviour. The reservoirs were studied by field emission gun-scanning electron microscopy (FEG-SEM), micro-Raman spectroscopy, and transmission electron microscopy (TEM). The friction behaviour was evaluated by cylinder on plane tests (friction coefficient and scuffing resistance). The results showed that the SiC polytype and the sintering temperature modified the graphite structures. The SiC dissociation promoted the formation of different nano graphites, presenting different turbostratic 2D and 3D arrays. The results showed that the presence of the turbostratic graphite was beneficial to the friction behaviour of these composites, which offered better tribological performance than the composite with 3D graphite.
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14
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Kałużny J, Świetlicka A, Wojciechowski Ł, Boncel S, Kinal G, Runka T, Nowicki M, Stepanenko O, Gapiński B, Leśniewicz J, Błaszkiewicz P, Kempa K. Machine Learning Approach for Application-Tailored Nanolubricants’ Design. NANOMATERIALS 2022; 12:nano12101765. [PMID: 35630989 PMCID: PMC9146785 DOI: 10.3390/nano12101765] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 05/11/2022] [Accepted: 05/16/2022] [Indexed: 01/27/2023]
Abstract
The fascinating tribological phenomenon of carbon nanotubes (CNTs) observed at the nanoscale was confirmed in our numerous macroscale experiments. We designed and employed CNT-containing nanolubricants strictly for polymer lubrication. In this paper, we present the experiment characterising how the CNT structure determines its lubricity on various types of polymers. There is a complex correlation between the microscopic and spectral properties of CNTs and the tribological parameters of the resulting lubricants. This confirms indirectly that the nature of the tribological mechanisms driven by the variety of CNT–polymer interactions might be far more complex than ever described before. We propose plasmonic interactions as an extension for existing models describing the tribological roles of nanomaterials. In the absence of quantitative microscopic calculations of tribological parameters, phenomenological strategies must be employed. One of the most powerful emerging numerical methods is machine learning (ML). Here, we propose to use this technique, in combination with molecular and supramolecular recognition, to understand the morphology and macro-assembly processing strategies for the targeted design of superlubricants.
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Affiliation(s)
- Jarosław Kałużny
- Institute of Combustion Engines and Powertrains, Poznan University of Technology, 60-965 Poznań, Poland;
- Correspondence:
| | - Aleksandra Świetlicka
- Institute of Automatic Control and Robotics, Poznan University of Technology, 60-965 Poznań, Poland;
| | - Łukasz Wojciechowski
- Institute of Machines and Motor Vehicles, Poznan University of Technology, 60-965 Poznań, Poland; (Ł.W.); (G.K.)
| | - Sławomir Boncel
- Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Silesian University of Technology, 44-100 Gliwice, Poland;
| | - Grzegorz Kinal
- Institute of Machines and Motor Vehicles, Poznan University of Technology, 60-965 Poznań, Poland; (Ł.W.); (G.K.)
| | - Tomasz Runka
- Institute of Materials Research and Quantum Engineering, Poznan University of Technology, 60-965 Poznań, Poland;
| | - Marek Nowicki
- Institute of Physics, Poznan University of Technology, 60-965 Poznań, Poland; (M.N.); (P.B.)
| | - Oleksandr Stepanenko
- Institute of Combustion Engines and Powertrains, Poznan University of Technology, 60-965 Poznań, Poland;
| | - Bartosz Gapiński
- Institute of Mechanical Technology, Poznan University of Technology, 60-965 Poznań, Poland;
| | - Joanna Leśniewicz
- Łukasiewicz Research Network—Poznan Institute of Technology, 60-654 Poznań, Poland;
| | - Paulina Błaszkiewicz
- Institute of Physics, Poznan University of Technology, 60-965 Poznań, Poland; (M.N.); (P.B.)
| | - Krzysztof Kempa
- Department of Physics Faculty, Boston College, Boston, MA 02467, USA;
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15
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KrF Laser and Plasma Exposure of PDMS-Carbon Composite and Its Antibacterial Properties. MATERIALS 2022; 15:ma15030839. [PMID: 35160785 PMCID: PMC8836707 DOI: 10.3390/ma15030839] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/18/2022] [Accepted: 01/19/2022] [Indexed: 02/01/2023]
Abstract
A polydimethylsiloxane (PDMS) composite with multi-walled carbon nanotubes was successfully prepared. Composite foils were treated with both plasma and excimer laser, and changes in their physicochemical properties were determined in detail. Mainly changes in surface chemistry, wettability, and morphology were determined. The plasma treatment of PDMS complemented with subsequent heating led to the formation of a unique wrinkle-like pattern. The impact of different laser treatment conditions on the composite surface was determined. The morphology was determined by AFM and LCM techniques, while chemical changes and chemical surface mapping were studied with the EDS/EDX method. Selected activated polymer composites were used for the evaluation of antibacterial activity using Gram-positive (Staphylococcus epidermidis) and Gram-negative (Escherichia coli) bacteria. The antibacterial effect was achieved against S. epidermidis on pristine PDMS treated with 500 mJ of laser energy and PDMS-C nanocomposite treated with a lower laser fluence of 250 mJ. Silver deposition of PDMS foil increases significantly its antibacterial properties against E. coli, which is further enhanced by the carbon predeposition or high-energy laser treatment.
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