Classification and application of metal-based nanoantioxidants in medicine and healthcare

• Nguyen Nhat Nam,
• Nguyen Khoi Song Tran,
• Tan Tai Nguyen,
• Nguyen Ngoc Trai,
• Nguyen Phuong Thuy,
• Hoang Dang Khoa Do,
• Nhu Hoa Thi Tran and
• Kieu The Loan Trinh

Beilstein J. Nanotechnol. 2024, 15, 396–415, doi:10.3762/bjnano.15.36

• employ the properties of transition metals and metal oxides (e.g., cobalt, iron, cerium, and gold), which can generate a cycle of reduction and oxidation stages [20][21][22][23]. Among these metal oxides, cerium oxide-based nanomaterials have been deeply studied with regard to the mechanisms of CAT

• reported. Most of them employ transition metals such as iron [70], copper [71], cobalt [72], gold [73], manganese [74], platinum [75], or cerium [76] as main elements. Most transition metals have various oxidation states allowing them to generate cycles of redox reactions that are involved in superoxide

Influence of conductive carbon and MnCo₂O₄ on morphological and electrical properties of hydrogels for electrochemical energy conversion

• Sylwia Pawłowska,
• Karolina Cysewska,
• Yasamin Ziai,
• Jakub Karczewski,
• Piotr Jasiński and
• Sebastian Molin

Beilstein J. Nanotechnol. 2024, 15, 57–70, doi:10.3762/bjnano.15.6

• (APS, 98%, Sigma-Aldrich, Poland), N,N,N′,N′-tetramethylethylenediamine (TEMED, 99%, Sigma-Aldrich, Poland), commercially available manganese cobalt spinel MnCo2O4 powder (MCO, Marion Technologie, France), Super P Li conductive carbon black (cCB, Imerys, Belgium), 0.1 M KOH (Titripur®, Merck, Germany

Fragmentation of metal(II) bis(acetylacetonate) complexes induced by slow electrons

• Janina Kopyra and
• Hassan Abdoul-Carime

Beilstein J. Nanotechnol. 2023, 14, 980–987, doi:10.3762/bjnano.14.81

• the ligands, that is, (L-C3H3), is observed for CoL2 (Figure 2), NiL2 (Figure 3), and CuL2 (Figure 4), as [ML(L-C3H3)]− anion (Table 1). We can notice that the Mn (Figure 5) and Cu (Figure 4) complexes produce fewer fragments than those containing cobalt, nickel, and zinc. Furthermore, the

Low temperature atomic layer deposition of cobalt using dicobalt hexacarbonyl-1-heptyne as precursor

• Mathias Franz,
• Mahnaz Safian Jouzdani,
• Lysann Kaßner,
• Marcus Daniel,
• Frank Stahr and
• Stefan E. Schulz

Beilstein J. Nanotechnol. 2023, 14, 951–963, doi:10.3762/bjnano.14.78

• , Clemens-Winkler-Str. 6c, 09116 Chemnitz, Germany FAP Forschungs- und Applikationslabor Plasmatechnik GmbH, Gostritzer Str. 67B, 01217 Dresden, Germany 10.3762/bjnano.14.78 Abstract In this work, we present the development of an atomic layer deposition (ALD) process for metallic cobalt. The process

• saturation behaviour of the process was investigated. X-ray photoelectron spectroscopy measurements could show that the deposited cobalt is in the metallic state. The finally established process in ALD mode shows a homogeneous coating at the wafer level. Keywords: atomic layer deposition (ALD); cobalt; low

• -temperature ALD; PEALD; plasma-enhanced ALD; XPS; Introduction The atomic layer deposition (ALD) of cobalt films is an ongoing topic of interest [1]. Cobalt thin and ultrathin films play an important role in current generations of integrated circuits [2]. Compared to copper, the metal offers a greater

Upscaling the urea method synthesis of CoAl layered double hydroxides

• Camilo Jaramillo-Hernández,
• Víctor Oestreicher,
• Martín Mizrahi and
• Gonzalo Abellán

Beilstein J. Nanotechnol. 2023, 14, 927–938, doi:10.3762/bjnano.14.76

• high-left and low-right shoulders around 492 and 450 nm. The shape and the position of these d–d electronic transition bands are assigned to the 4T1g→4T1g(P) and 4T1g→4A2g(F) transitions in octahedral divalent cobalt cations (CoII(Oh)) [31][51][52]. However, the sample x25M contains an extra band with

• applications of great interest. Experimental Chemicals Cobalt chloride hexahydrate (CoCl2·6H2O), aluminium chloride hexahydrate (AlCl3·6H2O), urea, and ethanol (EtOH) were purchased from Honeywell. All chemicals were used as received. Milli‐Q water was obtained from a Millipore Milli‐Q equipment. Synthesis

• for Co 2p (2p3/2 and 2p1/2) in the range of 810–770 eV. (D) UV–vis spectra pointing out the marked differences between the octahedral CoII(Oh) and tetrahedral environments CoII(Td) of cobalt for the scale-up samples. (A) Normalized XANES spectra at the Co K edge for the obtained samples. The grey line

Ni, Co, Zn, and Cu metal-organic framework-based nanomaterials for electrochemical reduction of CO₂: A review

• Ha Huu Do and
• Hai Bang Truong

Beilstein J. Nanotechnol. 2023, 14, 904–911, doi:10.3762/bjnano.14.74

• architectures, pronounced porosity, abundant active sites, and well-distributed metallic nodes. This article commences by elucidating the mechanistic aspects of CO2 reduction, followed by a comprehensive exploration of diverse materials encompassing MOFs based on nickel, cobalt, zinc, and copper for efficient

• to the enhanced number of active sites achieved through the transition from the bulk state to the nanomaterial form. The optimal condition for the fabrication of 2D Ni(Im)2 was determined to be the utilization of 5 mL of NH4OH. Co-based MOFs nanomaterials Cobalt materials provide a diversity of

Metal-organic framework-based nanomaterials as opto-electrochemical sensors for the detection of antibiotics and hormones: A review

• Akeem Adeyemi Oladipo,
• Saba Derakhshan Oskouei and
• Mustafa Gazi

Beilstein J. Nanotechnol. 2023, 14, 631–673, doi:10.3762/bjnano.14.52

• behaviour even further. Through variation in temperature resistivity, Clough et al. [83] demonstrated band-like metallic conductivity in cobalt-based MOF. The ferroelectric characteristics of MOFs have not yet been extensively investigated experimentally. However, calculations based on density functional

Mixed oxides with corundum-type structure obtained from recycling can seals as paint pigments: color stability

• Dienifer F. L. Horsth,
• Julia de O. Primo,
• Nayara Balaba,
• Fauze J. Anaissi and
• Carla Bittencourt

Beilstein J. Nanotechnol. 2023, 14, 467–477, doi:10.3762/bjnano.14.37

• without added pigments exhibits a more significant color variation (ΔE) in an acid environment. A work under similar conditions of harsh environments with cobalt and nickel aluminates obtained by the same synthetic route used in this article yielded similar results of color stability [14], with

Conjugated photothermal materials and structure design for solar steam generation

• Chia-Yang Lin and
• Tsuyoshi Michinobu

Beilstein J. Nanotechnol. 2023, 14, 454–466, doi:10.3762/bjnano.14.36

• to a lowering of the surface temperature of the sidewalls, allowing for further energy harvesting from the environment. All these processes will contribute to the increase in the overall water evaporation amount. Shao et al. fabricated a nickel–cobalt bimetal (Ni1Co3@PDA) coated with self-polymerized

• with the average temperatures of the sidewall surfaces under solar spectral irradiance (AM1.5G). Figure 11 was adapted with permission of The Royal Society of Chemistry from [49] (“Stackable nickel–cobalt@polydopamine nanosheet based photothermal sponges for highly efficient solar steam generation” by

Molecular nanoarchitectonics: unification of nanotechnology and molecular/materials science

• Katsuhiko Ariga

Beilstein J. Nanotechnol. 2023, 14, 434–453, doi:10.3762/bjnano.14.35

• . Sequential block oligomerization was actually demonstrated using cobalt porphyrin molecules and copper porphyrin oligomers upon annealing again at 210 °C. The block elongation was confirmed through the contrast difference of porphyrin centers (concave and convex), corresponding to Cu and Co porphyrin units

• were successfully synthesized by sequential coupling of CF3-substituted copper, cobalt, and palladium porphyrins on the surface. The assembly of different porphyrin oligomers combines multiple functional properties such as gas adsorption and magnetism in a one-dimensional structure. This approach could

Evaluation of electrosynthesized reduced graphene oxide–Ni/Fe/Co-based (oxy)hydroxide catalysts towards the oxygen evolution reaction

• Karolina Cysewska,
• Marcin Łapiński,
• Marcin Zając,
• Jakub Karczewski,
• Piotr Jasiński and
• Sebastian Molin

Beilstein J. Nanotechnol. 2023, 14, 420–433, doi:10.3762/bjnano.14.34

• Cracow, Poland 10.3762/bjnano.14.34 Abstract In this work, the specific role of the addition of graphene oxide (GO) to state-of-the-art nickel–iron (NiFe) and cobalt–nickel–iron (CoNiFe) mixed oxides/hydroxides towards the oxygen evolution reaction (OER) is investigated. Morphology, structure, and OER

• and expensive metals [5], studies on other catalyst materials are being conducted. Recently, transition-metal-based materials including nickel, iron, and/or cobalt have become promising catalysts for OER [6][7][8][9][10]. The materials are characterized by relatively low cost and environmentally

• 260 mV (Tafel slope: 72 mV·dec−1) and 320 mV (65 mV∙dec−1) determined at 10 mA·cm−2 in 1 M potassium hydroxide (KOH), respectively. In another work, nickel/nickel oxide (Ni-NiO) and cobalt/cobalt oxide (Co-CoO) were chemically synthesized with three-dimensional hierarchical porous graphene (3DHPG) on

Plasmonic nanotechnology for photothermal applications – an evaluation

• A. R. Indhu,
• L. Keerthana and
• Gnanaprakash Dharmalingam

Beilstein J. Nanotechnol. 2023, 14, 380–419, doi:10.3762/bjnano.14.33

• elements, nanospheres of gold, silver, platinum, cobalt, zinc, nickel, titanium, copper, aluminium, molybdenum, vanadium, and palladium have been analysed [98]. Although there were assumptions of homogeneity, sphericity, and no interaction between particles, the Mie theory-based scattering cross sections

The influence of structure and local structural defects on the magnetic properties of cobalt nanofilms

• Alexander Vakhrushev,
• Aleksey Fedotov,
• Olesya Severyukhina and
• Anatolie Sidorenko

Beilstein J. Nanotechnol. 2023, 14, 23–33, doi:10.3762/bjnano.14.3

• , Academiei 3/3, Chisinau 2028, Moldova 10.3762/bjnano.14.3 Abstract The present paper considers a mathematical model describing the time evolution of spin states and magnetic properties of a nanomaterial. We present the results of two variants of nanosystem simulations. In the first variant, cobalt with a

• structure close to the hexagonal close-packed crystal lattice was considered. In the second case, a cobalt nanofilm formed in the previously obtained numerical experiment of multilayer niobium–cobalt nanocomposite deposition was investigated. The sizes of the systems were the same in both cases. For both

• ideal structure. In all cases of calculations for cobalt, the ferromagnetic behavior was preserved. Defects in the structure and local arrangement of the atoms cause a deterioration in the magnetic macroscopic parameters, such as a decrease in the magnetization modulus. Keywords: LAMMPS; magnetic

Structural studies and selected physical investigations of LiCoO₂ obtained by combustion synthesis

• Monika Michalska,
• Paweł Ławniczak,
• Tomasz Strachowski,
• Adam Ostrowski and
• Waldemar Bednarski

Beilstein J. Nanotechnol. 2022, 13, 1473–1482, doi:10.3762/bjnano.13.121

• the annealing temperature causes a steady decrease in the DC conductivity. Keywords: lithium cobalt oxide; lithium-ion battery; nanocrystalline powder; solution combustion synthesis; Introduction Lithium cobalt oxide (LiCoO2, LCO) of hexagonal structure () was first used as cathode material in

• capable of reversibly intercalating lithium ions [2]. The commercialization of lithium-ion cells was achieved in the early 1990s by Sony Corporation and in 1992 by a joint venture company (Asahi Kasai and Toshiba) [2][3][4]. Almost 90% of commercial Li-ion batteries consist of a lithium cobalt oxide

• ]. One of the main advantages of the cobalt-based battery is its high theoretical capacity of 274 mAh·g−1, the high working potential of 4.0 V vs Li/Li+, and the high energy density of approximately 500 Wh·kg−1 [5][6][7][8][9]. The complete removal of lithium ions from the LiCoO2 structure is prevented

Recent advances in green carbon dots (2015–2022): synthesis, metal ion sensing, and biological applications

• Aisha Kanwal,
• Naheed Bibi,
• Sajjad Hyder,
• Arif Muhammad,
• Hao Ren,
• Jiangtao Liu and
• Zhongli Lei

Beilstein J. Nanotechnol. 2022, 13, 1068–1107, doi:10.3762/bjnano.13.93

Electrocatalytic oxygen reduction activity of AgCoCu oxides on reduced graphene oxide in alkaline media

• Iyyappan Madakannu,
• Indrajit Patil,
• Bhalchandra Kakade and
• Kasibhatta Kumara Ramanatha Datta

Beilstein J. Nanotechnol. 2022, 13, 1020–1029, doi:10.3762/bjnano.13.89

• the oxygen reduction reaction (ORR) in alkaline medium. Varying the Ag fraction in copper cobalt oxide has a significant influence on the ORR activity. At a ratio of 2:1:1, AgCuCo oxide NPs on rGO displayed the best values for onset potential, half-wave potential, and limiting current density (Jk) of

• 0.94 V vs RHE, 0.78 V, and 3.6 mA·cm−2, respectively, with an electrochemical active surface area of 66.92 m2·g−1 and a mass activity of 40.55 mA·mg−1. The optimum electrocatalyst shows considerable electrochemical stability over 10,000 cycles in 0.1 M KOH solution. Keywords: copper cobalt oxide NPs

• electrocatalysts [14][18][19]. Oxophilicity, agglomeration, and poor chemical stability of Ag require the amalgamation of Ag with other metals for a better optical and catalytic activity [20]. Chen et al. synthesised Ag nanoscale alloys containing metals such as copper, cobalt, iron, and indium via pulse film

Nanoarchitectonics of the cathode to improve the reversibility of Li–O₂ batteries

• Hien Thi Thu Pham,
• Jonghyeok Yun,
• So Yeun Kim,
• Sang A Han,
• Jung Ho Kim,
• Jong-Won Lee and
• Min-Sik Park

Beilstein J. Nanotechnol. 2022, 13, 689–698, doi:10.3762/bjnano.13.61

• metal ions are zinc and cobalt, respectively) have been extensively studied for various energy storage applications [35][36]. From a structural viewpoint, ZIF-8-derived carbon materials have a large specific surface area with a well-defined microporous structure and a high N content [37]. Meanwhile, ZIF

• 20%, 50%, and 80% of zinc ions in the metal precursors). Firstly, metal solutions were prepared by dissolving stoichiometric amounts of cobalt acetate tetrahydrate (Co(CH3COO)2⋅4H2O, Sigma-Aldrich, 98%) and zinc acetate dihydrate (Zn(CH3COO)2·2H2O, Sigma-Aldrich, 99%) in methanol (60 mL). Meanwhile

Interfacial nanoarchitectonics for ZIF-8 membranes with enhanced gas separation

• Season S. Chen,
• Zhen-Jie Yang,
• Chia-Hao Chang,
• Hoong-Uei Koh,
• Sameerah I. Al-Saeedi,
• Kuo-Lun Tung and
• Kevin C.-W. Wu

Beilstein J. Nanotechnol. 2022, 13, 313–324, doi:10.3762/bjnano.13.26

• imidazoles (organic linkers) and zinc or cobalt ions (metal ions). They are considered as promising nanostructured materials in technologies related to energy and environmental science [2][28][29][30]. ZIFs are of particular interest for gas separation due to their additional framework flexibility imposed by

Measurement of polarization effects in dual-phase ceria-based oxygen permeation membranes using Kelvin probe force microscopy

• Kerstin Neuhaus,
• Christina Schmidt,
• Liudmila Fischer,
• Wilhelm Albert Meulenberg,
• Ke Ran,
• Joachim Mayer and
• Stefan Baumann

Beilstein J. Nanotechnol. 2021, 12, 1380–1391, doi:10.3762/bjnano.12.102

• that the spinel also participates in the reaction in this case. Speculatively, it would be possible that the spinel, whose iron and cobalt moieties are also redox active, could lead to further charge redistribution and additional reaction. In this case, however, the additional gradient would be

Biocompatibility and cytotoxicity in vitro of surface-functionalized drug-loaded spinel ferrite nanoparticles

• Sadaf Mushtaq,
• Khuram Shahzad,
• Tariq Saeed,
• Anwar Ul-Hamid,
• Bilal Haider Abbasi,
• Nafees Ahmad,
• Waqas Khalid,
• Muhammad Atif,
• Zulqurnain Ali and
• Rashda Abbasi

Beilstein J. Nanotechnol. 2021, 12, 1339–1364, doi:10.3762/bjnano.12.99

• vitro compared to free drug controls. The IC50 values ranged from 0.81 to 3.97 μg/mL for HepG2 and HT144 cells, whereas IC50 values for normal lymphocytes were 10 to 35 times higher (18.35–43.04 µg/mL). Cobalt ferrite (CFO) and zinc ferrite (ZFO) NPs were highly genotoxic (p < 0.05) in cancer cell lines

• adverse interactions with hemoglobin [13]. Magnetic spinel ferrites nanoparticles (MSFNPs) with a general formula of MFe2O4 (where M = divalent cation of Co, Ni, Zn, Mn, or Mg) are soft magnetic materials with a face-centered cubic structure [14]. Among those, cobalt ferrite NPs have a large

• magnetocrystalline anisotropy, high saturation magnetization, and coercivity even at room temperature as compared to others [15]. The substitution of metal cations M+ for cobalt, nickel, and zinc contributes to diverse magnetic properties, morphology, and size of iron oxide NPs [13][16] along with varied tissue

Enhancement of the piezoelectric coefficient in PVDF-TrFe/CoFe₂O₄ nanocomposites through DC magnetic poling

• Marco Fortunato,
• Alessio Tamburrano,
• Maria Paola Bracciale,
• Maria Laura Santarelli and
• Maria Sabrina Sarto

Beilstein J. Nanotechnol. 2021, 12, 1262–1270, doi:10.3762/bjnano.12.93

• /CoFe2O4 with 5 wt % of CoFe2O4. FESEM images of PVDF-TrFe/CoFe2O4 nanocomposites with 5 wt % of CoFe2O4 magnetically poled at 111 mT for 1 h at 65 °C. (a) SEM image and (b–d) EDX maps of (b) oxygen, (c) cobalt, and (d) iron of the PVDF-TrFe/CoFe2O4 nanocomposite with 5 wt % of CoFe2O4 magnetically poled

The effect of cobalt on morphology, structure, and ORR activity of electrospun carbon fibre mats in aqueous alkaline environments

• Markus Gehring,
• Tobias Kutsch,
• Osmane Camara,
• Alexandre Merlen,
• Hermann Tempel,
• Hans Kungl and
• Rüdiger-A. Eichel

Beilstein J. Nanotechnol. 2021, 12, 1173–1186, doi:10.3762/bjnano.12.87

• fibres. In this study, cobalt-decorated fibres are prepared, and the influence of carbonisation temperature on the resulting particle decoration, as well as on fibre structure and morphology is discussed. Scanning electron microscopy, Raman spectroscopy, X-ray diffraction, X-ray photoelectron

• spectroscopy, elemental analysis, and inductively coupled plasma optical emission spectrometry are used for characterisation. The modified fibre system is compared to a benchmark system without cobalt additives. Cobalt is known to catalyse the formation of graphite in carbonaceous materials at elevated

• temperatures. As a result of cobalt migration in the material the resulting overall morphology is that of turbostratic carbon. Nitrogen removal and nitrogen-type distribution are enhanced by the cobalt additives. At lower carbonisation temperatures cobalt is distributed over the surface of the fibres, whereas

Revealing the formation mechanism and band gap tuning of Sb₂S₃ nanoparticles

• Maximilian Joschko,
• Franck Yvan Fotue Wafo,
• Christina Malsi,
• Danilo Kisić,
• Ivana Validžić and
• Christina Graf

Beilstein J. Nanotechnol. 2021, 12, 1021–1033, doi:10.3762/bjnano.12.76

• found in high-temperature seeding processes from other metalloorganic syntheses [36]. A changing chemical composition could also be a reason for the nanoparticles to undergo a second hierarchical assembly. A similar behavior was found by Liu et al., who synthesized cobalt particles with a cobalt

Progress and innovation of nanostructured sulfur cathodes and metal-free anodes for room-temperature Na–S batteries

• Marina Tabuyo-Martínez,
• Bernd Wicklein and
• Pilar Aranda

Beilstein J. Nanotechnol. 2021, 12, 995–1020, doi:10.3762/bjnano.12.75

• . Consequently, the electrocatalysts accelerate the reaction kinetics, improving the electrochemical performance of Na–S batteries. Different compounds were shown to have this property such as cobalt nanoparticles [34][45][46], iron nanoclusters [47] and iron disulfide [48], gold nanodots [49], nickel sulfide

• nanocrystals [50], molybdenum trioxide [21], manganese dioxide [51], and vanadium carbide nanoparticles [12]. For instance, the electrocatalytic performance of cobalt nanoparticles (CoNPs) was reported by Zhang et al. [45] who studied a cathode comprising hollow carbon nanospheres. The cathode displayed a

• on Earth, widely available and with a relatively small ecological footprint. They also do not require the same amount of rare and socially contested metals as LiBs. The substitution of cobalt-based electrocatalytic NPs in RT Na–S with less critical transition metal and noble metal NPs would further

A Au/CuNiCoS₄/p-Si photodiode: electrical and morphological characterization

• Adem Koçyiğit,
• Adem Sarılmaz,
• Teoman Öztürk,
• Faruk Ozel and
• Murat Yıldırım

Beilstein J. Nanotechnol. 2021, 12, 984–994, doi:10.3762/bjnano.12.74

• nanocrystals. Also, I–V and C–V measurements were performed to determine the photodiode and capacitance characteristics of the Au/CuNiCoS4/p-Si devices. Experimental Materials Copper(II) acetate (CuAc2), nickel(II) acetate (NiAc2), cobalt acetate (CoAc2), trioctylphosphine oxide (TOPO), 1-dodecanethiol (DDT