1
|
Costas A, Preda N, Zgura I, Kuncser A, Apostol N, Curutiu C, Enculescu I. Silver nanoparticles decorated ZnO-CuO core-shell nanowire arrays with low water adhesion and high antibacterial activity. Sci Rep 2023; 13:10698. [PMID: 37400545 PMCID: PMC10318101 DOI: 10.1038/s41598-023-37953-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Accepted: 06/30/2023] [Indexed: 07/05/2023] Open
Abstract
Nanostructured surfaces based on silver nanoparticles decorated ZnO-CuO core-shell nanowire arrays, which can assure protection against various environmental factors such as water and bacteria were developed by combining dry preparation techniques namely thermal oxidation in air, radio frequency (RF) magnetron sputtering and thermal vacuum evaporation. Thus, high-aspect-ratio ZnO nanowire arrays were grown directly on zinc foils by thermal oxidation in air. Further ZnO nanowires were coated with a CuO layer by RF magnetron sputtering, the obtained ZnO-CuO core-shell nanowires being decorated with Ag nanoparticles by thermal vacuum evaporation. The prepared samples were comprehensively assessed from morphological, compositional, structural, optical, surface chemistry, wetting and antibacterial activity point of view. The wettability studies show that native Zn foil and ZnO nanowire arrays grown on it are featured by a high water droplet adhesion while ZnO-CuO core-shell nanowire arrays (before and after decoration with Ag nanoparticles) reveal a low water droplet adhesion. The antibacterial tests carried on Escherichia coli (a Gram-negative bacterium) and Staphylococcus aureus (a Gram-positive bacterium) emphasize that the nanostructured surfaces based on nanowire arrays present excellent antibacterial activity against both type of bacteria. This study proves that functional surfaces obtained by relatively simple and highly reproducible preparation techniques that can be easily scaled to large area are very attractive in the field of water repellent coatings with enhanced antibacterial function.
Collapse
Affiliation(s)
- Andreea Costas
- National Institute of Materials Physics, Atomistilor 405A, 077125, Magurele, Romania
| | - Nicoleta Preda
- National Institute of Materials Physics, Atomistilor 405A, 077125, Magurele, Romania.
| | - Irina Zgura
- National Institute of Materials Physics, Atomistilor 405A, 077125, Magurele, Romania
| | - Andrei Kuncser
- National Institute of Materials Physics, Atomistilor 405A, 077125, Magurele, Romania
| | - Nicoleta Apostol
- National Institute of Materials Physics, Atomistilor 405A, 077125, Magurele, Romania
| | - Carmen Curutiu
- Microbiology Immunology Department, Faculty of Biology, University of Bucharest, Aleea Portocalelor 1-3, 060101, Bucharest, Romania
| | - Ionut Enculescu
- National Institute of Materials Physics, Atomistilor 405A, 077125, Magurele, Romania
| |
Collapse
|
2
|
Preda N, Costas A, Beregoi M, Apostol N, Kuncser A, Curutiu C, Iordache F, Enculescu I. Functionalization of eggshell membranes with CuO-ZnO based p-n junctions for visible light induced antibacterial activity against Escherichia coli. Sci Rep 2020; 10:20960. [PMID: 33262424 PMCID: PMC7708484 DOI: 10.1038/s41598-020-78005-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 11/17/2020] [Indexed: 11/30/2022] Open
Abstract
Biopolymers provide versatile platforms for designing naturally-derived wound care dressings through eco-friendly pathways. Eggshell membrane (ESM), a widely available, biocompatible biopolymer based structure features a unique 3D porous interwoven fibrous protein network. The ESM was functionalized with inorganic compounds (Ag, ZnO, CuO used either separately or combined) using a straightforward deposition technique namely radio frequency magnetron sputtering. The functionalized ESMs were characterized from morphological, structural, compositional, surface chemistry, optical, cytotoxicity and antibacterial point of view. It was emphasized that functionalization with a combination of metal oxides and exposure to visible light results in a highly efficient antibacterial activity against Escherichia coli when compared to the activity of individual metal oxide components. It is assumed that this is possible due to the fact that an axial p-n junction is created by joining the two metal oxides. This structure separates into components the charge carrier pairs promoted by visible light irradiation that further can influence the generation of reactive oxygen species which ultimately are responsible for the bactericide effect. This study proves that, by employing inexpensive and environmentally friendly materials (ESM and metal oxides) and fabrication techniques (radio frequency magnetron sputtering), affordable antibacterial materials can be developed for potential applications in chronic wound healing device area.
Collapse
Affiliation(s)
- Nicoleta Preda
- National Institute of Materials Physics, Atomistilor 405A, 077125, Magurele, Romania.
| | - Andreea Costas
- National Institute of Materials Physics, Atomistilor 405A, 077125, Magurele, Romania
| | - Mihaela Beregoi
- National Institute of Materials Physics, Atomistilor 405A, 077125, Magurele, Romania
| | - Nicoleta Apostol
- National Institute of Materials Physics, Atomistilor 405A, 077125, Magurele, Romania
| | - Andrei Kuncser
- National Institute of Materials Physics, Atomistilor 405A, 077125, Magurele, Romania
| | - Carmen Curutiu
- Microbiology Immunology Department, Faculty of Biology, University of Bucharest, Aleea Portocalelor 1-3, 060101, Bucharest, Romania
| | - Florin Iordache
- University of Agronomic Sciences and Veterinary Medicine of Bucharest, 011464, Bucharest, Romania
| | - Ionut Enculescu
- National Institute of Materials Physics, Atomistilor 405A, 077125, Magurele, Romania.
| |
Collapse
|
3
|
Candu N, El Fergani M, Verziu M, Cojocaru B, Jurca B, Apostol N, Teodorescu C, Parvulescu VI, Coman SM. Efficient glucose dehydration to HMF onto Nb-BEA catalysts. Catal Today 2019. [DOI: 10.1016/j.cattod.2018.08.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
4
|
Satta M, Lacovig P, Apostol N, Dalmiglio M, Orlando F, Bignardi L, Bana H, Travaglia E, Baraldi A, Lizzit S, Larciprete R. The adsorption of silicon on an iridium surface ruling out silicene growth. Nanoscale 2018; 10:7085-7094. [PMID: 29616265 DOI: 10.1039/c8nr00648b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The adsorption of Si atoms on a metal surface might proceed through complex surface processes, whose rate is determined differently by factors such as temperature, Si coverage, and metal cohesive energy. Among other transition metals, iridium is a special case since the Ir(111) surface was reported first, in addition to Ag(111), as being suitable for the epitaxy of silicene monolayers. In this study we followed the adsorption of Si on the Ir(111) surface via high resolution core level photoelectron spectroscopy, starting from the clean metal surface up to a coverage exceeding one monolayer, in a temperature range between 300 and 670 K. Density functional theory calculations were carried out in order to evaluate the stability of the different Si adsorption configurations as a function of the coverage. Results indicate that, at low coverage, the Si adatoms tend to occupy the hollow Ir sites, although a small fraction of them penetrates the first Ir layer. Si penetration of the Ir surface can take place if the energy gained upon Si adsorption is used to displace the Ir surface atoms, rather then being dissipated differently. At a Si coverage of ∼1 monolayer, the Ir 4f spectrum indicates that not only the metal surface but also the layers underneath are perturbed. Our results point out that the Si/Ir(111) interface is unstable towards Si-Ir intermixing, in agreement with the silicide phase formation reported in the literature for the reverted interface.
Collapse
Affiliation(s)
- Mauro Satta
- CNR-Istituto per lo Studio dei Materiali Nanostrutturati (ISMN), Department of Chemistry, Sapienza University, P.le Aldo Moro 5, 00185, Roma, Italy
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
5
|
Candu N, Dhakshinamoorthy A, Apostol N, Teodorescu C, Corma A, Garcia H, Parvulescu VI. Oriented Au nanoplatelets on graphene promote Suzuki-Miyaura coupling with higher efficiency and different reactivity pattern than supported palladium. J Catal 2017. [DOI: 10.1016/j.jcat.2017.04.034] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
|
6
|
Larciprete R, Colonna S, Ronci F, Flammini R, Lacovig P, Apostol N, Politano A, Feulner P, Menzel D, Lizzit S. Self-Assembly of Graphene Nanoblisters Sealed to a Bare Metal Surface. Nano Lett 2016; 16:1808-17. [PMID: 26829243 DOI: 10.1021/acs.nanolett.5b04849] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The possibility to intercalate noble gas atoms below epitaxial graphene monolayers coupled with the instability at high temperature of graphene on the surface of certain metals has been exploited to produce Ar-filled graphene nanosized blisters evenly distributed on the bare Ni(111) surface. We have followed in real time the self-assembling of the nanoblisters during the thermal annealing of the Gr/Ni(111) interface loaded with Ar and characterized their morphology and structure at the atomic scale. The nanoblisters contain Ar aggregates compressed at high pressure arranged below the graphene monolayer skin that is decoupled from the Ni substrate and sealed only at the periphery through stable C-Ni bonds. Their in-plane truncated triangular shapes are driven by the crystallographic directions of the Ni surface. The nonuniform strain revealed along the blister profile is explained by the inhomogeneous expansion of the flexible graphene lattice that adjusts to envelop the Ar atom stacks.
Collapse
Affiliation(s)
- Rosanna Larciprete
- CNR-ISC Istituto dei Sistemi Complessi , Via Fosso del Cavaliere 100, 00133 Roma, Italy
| | - Stefano Colonna
- CNR-ISM Istituto di Struttura della Materia , Via Fosso del Cavaliere 100, 00133 Roma, Italy
| | - Fabio Ronci
- CNR-ISM Istituto di Struttura della Materia , Via Fosso del Cavaliere 100, 00133 Roma, Italy
| | - Roberto Flammini
- CNR-ISM Istituto di Struttura della Materia , Via Fosso del Cavaliere 100, 00133 Roma, Italy
| | - Paolo Lacovig
- Elettra-Sincrotrone Trieste S.C.p.A. , AREA Science Park, S.S. 14 km 163.5, 34149 Trieste, Italy
| | - Nicoleta Apostol
- National Institute of Materials Physics , Atomistilor 105b, 077125 Magurele-Ilfov, Romania
| | - Antonio Politano
- Department of Physics, University of Calabria , via ponte Bucci 31/C, 87036 Rende (CS), Italy
| | - Peter Feulner
- Physikdepartment E20, Technische Universität München , 85748 Garching, Germany
| | - Dietrich Menzel
- Physikdepartment E20, Technische Universität München , 85748 Garching, Germany
- Department of Chemical Physics, Fritz-Haber Institut , 14195 Berlin, Germany
| | - Silvano Lizzit
- Elettra-Sincrotrone Trieste S.C.p.A. , AREA Science Park, S.S. 14 km 163.5, 34149 Trieste, Italy
| |
Collapse
|
7
|
Pintilie I, Teodorescu CM, Ghica C, Chirila C, Boni AG, Hrib L, Pasuk I, Negrea R, Apostol N, Pintilie L. Polarization-control of the potential barrier at the electrode interfaces in epitaxial ferroelectric thin films. ACS Appl Mater Interfaces 2014; 6:2929-2939. [PMID: 24446901 DOI: 10.1021/am405508k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Electrode interface is a key element in controlling the macroscopic electrical properties of the ferroelectric capacitors based on thin films. In the case of epitaxial ferroelectrics, the electrode interface is essential in controlling the leakage current and the polarization switching, two important elements in the read/write processes of nonvolatile memories. However, the relation between the polarization bound charges and the electronic properties of the electrode interfaces is not yet well understood. Here we show that polarization charges are controlling the height of the potential barriers at the electrode interfaces in the case of Pb(Zr,Ti)O3 and BaTiO3 epitaxial films. The results suggest that the height is set to a value allowing rapid compensation of the depolarization field during the polarization switching, being almost independent of the metals used for electrodes. This general behavior open a new perspective in engineering interface properties and designing new devices based on epitaxial ferroelectrics.
Collapse
Affiliation(s)
- Ioana Pintilie
- National Institute of Materials Physics, Atomistilor 105 bis, Magurele 077125, Romania
| | | | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Tiseanu C, Parvulescu V, Avram D, Cojocaru B, Apostol N, Vela-Gonzalez AV, Sanchez-Dominguez M. Structural, down- and phase selective up-conversion emission properties of mixed valent Pr doped into oxides with tetravalent cations. Phys Chem Chem Phys 2014; 16:5793-802. [DOI: 10.1039/c3cp54899f] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
9
|
Ataman T, Dumitrescu V, Apostol N, Solomon S, Călăraşu R, Dimitriu T. [Long-term evolution of chronic suppurative otomastoiditis]. Rev Chir Oncol Radiol O R L Oftalmol Stomatol Otorinolaringol 1988; 33:193-6. [PMID: 2975020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
|
10
|
Hociotă D, Solomon S, Ataman T, Apostol N, Dumitrescu V, Dimitriu T. [Incidents, accidents and complications of transtympanic continuous drainage]. Rev Chir Oncol Radiol O R L Oftalmol Stomatol Otorinolaringol 1976; 21:253-8. [PMID: 139648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
11
|
Hociotă D, Ataman T, Apostol N. [Bandaging in otological functional surgery]. Rev Chir Oncol Radiol O R L Oftalmol Stomatol Otorinolaringol 1976; 21:23-8. [PMID: 134413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
12
|
Hociotă D, Ataman T, Apostol N. [Rupture of the tympanic membrane as an accident in ear surgery]. Rev Chir Oncol Radiol O R L Oftalmol Stomatol Otorinolaringol 1975; 20:259-62. [PMID: 129820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
13
|
Hociotă D, Ataman T, Apostol N. [Cerebrospinal otorrhea as an intraoperative accident in stapedectomy]. Rev Chir Oncol Radiol O R L Oftalmol Stomatol Otorinolaringol 1975; 20:171-5. [PMID: 127304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
14
|
Hociotă D, Ataman T, Apostol N, Solomon S. [Ossicular accidental injuries]. Rev Chir Oncol Radiol O R L Oftalmol Stomatol Otorinolaringol 1975; 20:29-36. [PMID: 127285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
15
|
Hociotă D, Apostol N. [Problems arising in the social rehabilitation of patients with hearing deficiencies]. Otorinolaringologie 1973; 18:327-38. [PMID: 4754509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
16
|
Apostol N, Hociotă D. [Psychological and psychopathological aspects in otorhinolaryngologic consultations]. Otorinolaringologie 1973; 18:283-92. [PMID: 4718554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
17
|
Hociotă D, Apostol N. [Methods of functional rehabilitation in ear diseases]. Otorinolaringologie 1973; 18:175-8. [PMID: 4714212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
18
|
Apostol N. [Psychological conditions in audiometric examinations]. Otorinolaringologie 1970; 15:337-41. [PMID: 5486059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
|
19
|
Apostol N, Popescu P, Teţu-Sbenghe L. [Some aspects of hearing aids]. Otorinolaringologie 1969; 14:193-208. [PMID: 5356064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
|
20
|
Apostol N, Teţu-Sbenghe L. [Evaluation of working capacity in patients with hypacusia]. Otorinolaringologie 1969; 14:65-8. [PMID: 5768679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
|
21
|
Lăzeanu M, Apostol N, Teţu-Sbenghe L. [Therapeutic management of Menièr's syndrome]. Otorinolaringologie 1968; 13:97-104. [PMID: 5686766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
|
22
|
Păunescu C, Lacriţeanu V, Apostol N, Trifan C, Teţu-Sbenghe L, Ciobanu M, Popovici C, Mincu D, Burulană M, Bgdan C, Dumitraşcu A, Georgescu V, Rădulescu B, Popa E, Tănăseanu M, Dumitrescu V, Rădulescu C, Tănăsie M, Cristea N. [The study of hypacusis in school children]. Otorinolaringologie 1968; 13:53-60. [PMID: 5662790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
|
23
|
Burghele T, Apostol N, Ioanid PC. [Hormone study of patients with adenoma and adenocarcinoma of the prostate]. Acta Urol Belg 1967; 35:389-400. [PMID: 4182042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
24
|
Tzetzu I, Apostol N. [Some data on the problem of bone conduction]. Ann Otolaryngol Chir Cervicofac 1967; 84:429-34. [PMID: 6062842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
|
25
|
Burghele T, Apostol N, Albescu I. [Hormonal variations in urogenital tuberculosis]. Urol Int 1966; 21:289-306. [PMID: 4289533 DOI: 10.1159/000279425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
26
|
Păunescu C, Apostol N, Lacriţianu V, Dumitraşcu A, Ciobanu M. [Current status of the methods of prevention and treatment of deafness in children]. Otorinolaringologie 1965; 10:97-108. [PMID: 5324522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
|