A visible-light photodetector based on heterojunctions between CuO nanoparticles and ZnO nanorods

• Doan Nhat Giang,
• Nhat Minh Nguyen,
• Duc Anh Ngo,
• Thanh Trang Tran,
• Le Thai Duy,
• Cong Khanh Tran,
• Thi Thanh Van Tran,
• Phan Phuong Ha La and
• Vinh Quang Dang

Beilstein J. Nanotechnol. 2023, 14, 1018–1027, doi:10.3762/bjnano.14.84

• ), zinc nitrate hexahydrate (Zn(NO3)2·6H2O, 99%, Xilong Scientific), copper(II) nitrate pentahydrate (Cu(NO3)2·5H2O, 99%, Xilong Scientific), sodium hydroxide (NaOH, 99%, Sigma-Aldrich Chemistry), ethanol (C2H5OH, 99.5%, Chemsol), and acetone (CH3OCH3, 99.7%, Chemsol). Synthesis process The synthesis

Near-infrared photoactive Ag-Zn-Ga-S-Se quantum dots for high-performance quantum dot-sensitized solar cells

• Roopakala Kottayi,
• Ilangovan Veerappan and
• Ramadasse Sittaramane

Beilstein J. Nanotechnol. 2022, 13, 1337–1344, doi:10.3762/bjnano.13.110

• (GaCl3), sulfur powder (S), 1-dodecanethiol (DDTh), ʟ-cysteine, copper(II) chloride, polyvinylidene fluoride (PVDF), titanium isisopropoxide (TIP), glycerol, oleylamine (OAM), titanium tetrachloride (TiCl4), N-methyl-2-pyrrolidine (NMP), chloroform, acetonitrile, ethanol, and methanol were purchased from

• [2][19][20]. Hence, in this work Cu2S was chosen as the CE material. The CE was fabricated as described in [8]. At first, Cu2S NPs were prepared by a hydrothermal method using ʟ-cysteine and copper(II) chloride. Then the Cu2S paste containing 95% of Cu2S and 5% of PVdF in NMP was coated onto FTO

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

Modification of a SERS-active Ag surface to promote adsorption of charged analytes: effect of Cu²⁺ ions

• Bahdan V. Ranishenka,
• Andrei Yu. Panarin,
• Irina A. Chelnokova,
• Sergei N. Terekhov,
• Peter Mojzes and
• Vadim V. Shmanai

Beilstein J. Nanotechnol. 2021, 12, 902–912, doi:10.3762/bjnano.12.67

• charged hydrophilic thiols (sodium 2-mercaptoethyl sulfonate, mercaptopropionic acid, 2-mercaptoethanol, 2-(dimethylamino)ethanethiol hydrochloride, and thiocholine) to vary the surface charge of the SERS substrate. We used two oppositely charged porphyrins, cationic copper(II) tetrakis(4-N-methylpyridyl

• ) porphine (CuTMpyP4) and anionic copper(II) 5,10,15,20-tetrakis(4-sulfonatophenyl)porphine (CuTSPP4), with equal charge value and similar structure as model analytes to probe the SERS signal. Our results indicate that the SERS spectrum intensity strongly, up to complete signal disappearance, correlates with

ZnO and MXenes as electrode materials for supercapacitor devices

• Ameen Uddin Ammar,
• Ipek Deniz Yildirim,
• Feray Bakan and
• Emre Erdem

Beilstein J. Nanotechnol. 2021, 12, 49–57, doi:10.3762/bjnano.12.4

• less defective flakes were obtained. The volumetric capacitance of the delaminated Mo2CTx “paper” was measured as 700 F·cm−3 at 2 mV·s−1 [28]. Ramachandran et al. developed a MXene composite with non-peripheral octamethyl-substituted copper(II) phthalocyanine, MXene/N-CuMe2Pc, with different fractions

Cu₂O nanoparticles for the degradation of methyl parathion

• Juan Rizo,
• David Díaz,
• Benito Reyes-Trejo and
• M. Josefina Arellano-Jiménez

Beilstein J. Nanotechnol. 2020, 11, 1546–1555, doi:10.3762/bjnano.11.137

• organisms. While this may be an advantage for water disinfection, it is a great disadvantage for the removal of OPPs in natural waters. Thus, Cu2O NPs are an excellent substance for the degradation of MP. Experimental Reagents The chemical reagents used for the synthesis of Cu2O NPs were: copper(II) sulfate

Role of redox-active axial ligands of metal porphyrins adsorbed at solid–liquid interfaces in a liquid-STM setup

• Thomas Habets,
• Sylvia Speller and
• Johannes A. A. W. Elemans

Beilstein J. Nanotechnol. 2020, 11, 1264–1271, doi:10.3762/bjnano.11.110

• additional currents were never observed in experiments with analogous porphyrins with a copper(II) or cobalt(II) center [10][11]. In the following, we will investigate the redox behavior of MnTUPCl at the solid–liquid interface in more detail. It is well-established that during and after the addition of

High permittivity, breakdown strength, and energy storage density of polythiophene-encapsulated BaTiO₃ nanoparticles

• Adnanullah Khan,
• Amir Habib and
• Adeel Afzal

Beilstein J. Nanotechnol. 2020, 11, 1190–1197, doi:10.3762/bjnano.11.103

• , hydrogen peroxide (H2O2, solution 30% w/w, Scharlab, S.L.) and copper(II) sulfate pentahydrate (CuSO4·5H2O, reagent grade, ≥98.0%, Honeywell) solution are added to the BTO-Th mixture. The reaction is performed by stirring the mixture for 7 h at 50 °C. The product is washed with double-distilled water and

Mannosylated brush copolymers based on poly(ethylene glycol) and poly(ε-caprolactone) as multivalent lectin-binding nanomaterials

• Stefania Ordanini,
• Wanda Celentano,
• Anna Bernardi and
• Francesco Cellesi

Beilstein J. Nanotechnol. 2019, 10, 2192–2206, doi:10.3762/bjnano.10.212

• -mannopyranoside (3), synthesized as already reported [32] (see Supporting Information File 1, Figure S1).The reaction conditions for the CuAAC were chosen according to [33]. In particular, the catalytic copper species was produced in situ by reducing copper(II) sulfate pentahydrate with sodium ascorbate, in the

Comparing a porphyrin- and a coumarin-based dye adsorbed on NiO(001)

• Sara Freund,
• Antoine Hinaut,
• Nathalie Marinakis,
• Edwin C. Constable,
• Ernst Meyer,
• Catherine E. Housecroft and
• Thilo Glatzel

Beilstein J. Nanotechnol. 2019, 10, 874–881, doi:10.3762/bjnano.10.88

• of the semiconductor. Typically, dyes are specifically designed to be compatible with one or the other type of device. Consequently, the careful choice of the dye is crucial for the optimal function of n- or p-type DSSCs. Because of its electron-donor character, copper(II) meso-tetrakis(4

An efficient electrode material for high performance solid-state hybrid supercapacitors based on a Cu/CuO/porous carbon nanofiber/TiO₂ hybrid composite

• Mamta Sham Lal,
• Thirugnanam Lavanya and
• Sundara Ramaprabhu

Beilstein J. Nanotechnol. 2019, 10, 781–793, doi:10.3762/bjnano.10.78

• ), titanium tetraisopropoxide (Ti{OCH(CH3)2}4, 97%), N,N-dimethylformamide (DMF, 99.8%), copper(II) nitrate trihydrate ((CuNO3)2·3H2O, 98%), 2-propanol (IPA, 99.5%) and N-methyl-2-pyrrolidinone (NMP, 99.5%) were purchased from Sigma-Aldrich and used as received without any further purification. Synthesis of

• copper(II) nitrate trihydrate [(CuNO3)2·3H2O] was added to this solution and stirred for further 30 min. The blended solution was loaded into a 10 mL disposable syringe with a needle diameter of 0.5 mm, pumped at a speed of 0.3 mL h−1 using a syringe pump. Aluminium foil was used as a collector, and the

Electrolyte tuning in dye-sensitized solar cells with N-heterocyclic carbene (NHC) iron(II) sensitizers

• Mariia Karpacheva,
• Catherine E. Housecroft and
• Edwin C. Constable

Beilstein J. Nanotechnol. 2018, 9, 3069–3078, doi:10.3762/bjnano.9.285

• . [21] have demonstrated the viability of DSCs comprising both copper(I)-based dyes and copper(I)/copper(II) redox shuttles. Photoconversion efficiencies in the range of 3–5% have been achieved for DSCs containing copper(I) dyes [22][23][24]. However, based upon the 800-fold greater natural abundance of

Cr(VI) remediation from aqueous environment through modified-TiO₂-mediated photocatalytic reduction

• Rashmi Acharya,
• Brundabana Naik and
• Kulamani Parida

Beilstein J. Nanotechnol. 2018, 9, 1448–1470, doi:10.3762/bjnano.9.137

Electron interaction with copper(II) carboxylate compounds

• Michal Lacko,
• Peter Papp,
• Iwona B. Szymańska,
• Edward Szłyk and
• Štefan Matejčík

Beilstein J. Nanotechnol. 2018, 9, 384–398, doi:10.3762/bjnano.9.38

• medical applications because copper exhibits antibacterial and antifungal properties [28]. In FEBID experiments, the deposited Cu–C lines and squares, obtained from the fluorinated copper(II) β-diketonate [Cu(hfac)2], had an atomic ratio of approximately Cu/C/O/F = 10:64:25:1. In materials obtained using

• nanocrystals dispersed in a polymeric carbonaceous matrix, which contains all the ligand elements: carbon, oxygen, fluorine and silicone [29][30]. Therefore, new copper FEBID precursors are still necessary. When designing such new precursors, it should be considered that copper(II) derivatives are more user

• -Cl-C6H4, C6F5) [33] and [Cu2(t-BuNH2)2(µ-O2CR)4] (R = CnF2n−1, n = 1–6) [34] investigated previously suggested that copper(II) easily changes its oxidation state to Cu(I) in the gas phase and the highest intensity was observed for the fragment Cu2(O2CR)+. On the other hand, copper(I) compounds

Comparative study of post-growth annealing of Cu(hfac)₂, Co₂(CO)₈ and Me₂Au(acac) metal precursors deposited by FEBID

• Marcos V. Puydinger dos Santos,
• Aleksandra Szkudlarek,
• Artur Rydosz,
• Carlos Guerra-Nuñez,
• Fanny Béron,
• Kleber R. Pirota,
• Stanislav Moshkalev,
• José Alexandre Diniz and
• Ivo Utke

Beilstein J. Nanotechnol. 2018, 9, 91–101, doi:10.3762/bjnano.9.11

• -pixel distance. Dicobalt octacarbonyl [Co2(CO)8], bis(hexafluoroacetylacetonato)copper(II) [Cu(hfac)2, Cu(HC5O2F6)2] and dimethyl(acetylacetonato)gold(III) [Me2Au(acac), (CH3)2Au(C5H7O2)] were employed as precursors, with average fluxes of 4.1 × 1018, 2.9 × 1017 and 3.6 × 1017 molecules·s−1·cm−2

Response under low-energy electron irradiation of a thin film of a potential copper precursor for focused electron beam induced deposition (FEBID)

• Leo Sala,
• Iwona B. Szymańska,
• Céline Dablemont,
• Anne Lafosse and
• Lionel Amiaud

Beilstein J. Nanotechnol. 2018, 9, 57–65, doi:10.3762/bjnano.9.8

• fragmentation of the precursor for leaving deposited material of desired composition. Here a new class of copper precursors is studied following an approach that probes some surface processes involved in the fragmentation of precursors. We use complexes of copper(II) with amines and perfluorinated carboxylate

• for ligands fragmentation allow one to envisage the use of the two precursors for FEBID studies. Keywords: amines; copper(II); electron-stimulated desorption; FEBID precursors; HREELS; low-energy electrons; perfluorinated carboxylates; Introduction The high electrical conductivity of copper makes it

• been proposed in situations where a good control of the composition is needed, for example in the case of alloy deposition [5]. A new group of copper precursors [Cu2(R′NH2)2(μ-O2CR)4] synthetized with two copper(II) cations has been designed by the co-authors at Nicolaus Copernicus University in Toruń

Strategy to discover full-length amyloid-beta peptide ligands using high-efficiency microarray technology

• Clelia Galati,
• Natalia Spinella,
• Lucio Renna,
• Danilo Milardi,
• Francesco Attanasio,
• Michele Francesco Maria Sciacca and
• Corrado Bongiorno

Beilstein J. Nanotechnol. 2017, 8, 2446–2453, doi:10.3762/bjnano.8.243

• high efficacy in the treatment of cognitive/memory disorder [32]: nootropic, neurotrophic, neuroprotective and anti-inflammatory effects, a high affinity for copper(II) ions, and a protective ability against metal-induced cell toxicity have been observed [33][34][35][36]. Hence, the role of Semax in

Fabrication of CeO₂–MO_x (M = Cu, Co, Ni) composite yolk–shell nanospheres with enhanced catalytic properties for CO oxidation

• Ling Liu,
• Jingjing Shi,
• Hongxia Cao,
• Ruiyu Wang and
• Ziwu Liu

Beilstein J. Nanotechnol. 2017, 8, 2425–2437, doi:10.3762/bjnano.8.241

• nanostructures for a broad range of technical applications. Experimental Materials Cerium(III) nitrate hexahydrate (Ce(NO3)3·6H2O), concentrated nitric acid (HNO3, 68%), diethylene glycol (DEG), acetone, copper(II) acetate monohydrate (Cu(CH3COO)2·H2O), nickel(II) acetate tetrahydrate (Ni(CH3COO)2·4H2O), cobalt

Tailoring the nanoscale morphology of HKUST-1 thin films via codeposition and seeded growth

• Landon J. Brower,
• Lauren K. Gentry,
• Amanda L. Napier and
• Mary E. Anderson

Beilstein J. Nanotechnol. 2017, 8, 2307–2314, doi:10.3762/bjnano.8.230

• controllable nanoscale dimensions can be designed and fabricated for integration of MOF systems directly into device architectures and sensor platforms. Keywords: atomic force microscopy; copper(II) 1,3,5-benzenetricarboxylate; ellipsometry; surface-anchored metal-organic frameworks; Introduction Metal

• , MO, USA). The DMSO was purged with nitrogen and passed through columns of molecular sieves. Copper(II) nitrate hemi(pentahydrate) (ACS grade) and copper(II) acetate monohydrate were received from Fisher Scientific (Fair Lawn, NJ, USA). Absolute, anhydrous ethyl alcohol (200 proof, ACS/USP grade) was

The interplay between spin densities and magnetic superexchange interactions: case studies of mono- and trinuclear bis(oxamato)-type complexes

• Azar Aliabadi,
• Bernd Büchner,
• Vladislav Kataev and
• Tobias Rüffer

Beilstein J. Nanotechnol. 2017, 8, 2245–2256, doi:10.3762/bjnano.8.224

• superexchange couplings of trinuclear bis(oxamato)-type complexes we review on efforts on such magneto-structural correlations. Keywords: bis(oxamato); bis(oxamidato); copper(II); electron nuclear double resonance; electron paramagnetic resonance; magnetic superexchange interactions; pulsed electron–electron

Micro- and nano-surface structures based on vapor-deposited polymers

• Hsien-Yeh Chen

Beilstein J. Nanotechnol. 2017, 8, 1366–1374, doi:10.3762/bjnano.8.138

• using selectively deposited parylene™ N to avoid the deposition on sub-45 nm copper nodes [79]. The copolymer poly(4-vinyl pyridine-co-divinyl benzene) was selectively deposited on a chromatography paper with screen-printed copper(II) chloride patterns [80]. A comprehensive study further examined the

Preparation of thick silica coatings on carbon fibers with fine-structured silica nanotubes induced by a self-assembly process

• Benjamin Baumgärtner,
• Hendrik Möller,
• Thomas Neumann and
• Dirk Volkmer

Beilstein J. Nanotechnol. 2017, 8, 1145–1155, doi:10.3762/bjnano.8.116

• particles prepared by addition of copper(II) ions exhibit for this ratio a pronounced two-dimensional and disk-like morphology with a diameter of a single silica fiber of about 30 nm (Figure 7). Usage of calcium(II) ions alters the morphology to spherical structures (Figure 8). Calcination of the metal

• sorption measurements. The overall morphology is more or less preserved for the immobilization of these modified aggregates on the carbon fiber surface. Addition of copper(II) ions leads to two-dimensional, fan like structures located on the fiber surface, whereas calcium(II) ions redirect the morphology

• towards a pronounced three-dimensional structure (Figure 9). The diameter of the composite fiber reaches 12 µm in the case of copper(II) ions and up to 100 µm for the incorporation of calcium(II) ions accompanied with a less smooth coating. Thus metal ions can be incorporated in the silica shell

Tailoring bifunctional hybrid organic–inorganic nanoadsorbents by the choice of functional layer composition probed by adsorption of Cu²⁺ ions

• Veronika V. Tomina,
• Inna V. Melnyk,
• Yuriy L. Zub,
• Aivaras Kareiva,
• Miroslava Vaclavikova,
• Gulaim A. Seisenbaeva and
• Vadim G. Kessler

Beilstein J. Nanotechnol. 2017, 8, 334–347, doi:10.3762/bjnano.8.36

• molecular structure of the surfaces. It was demonstrated that the introduction of short hydrophobic (methyl) groups improves the kinetic characteristics of the samples during the sorption of copper(II) ions and promotes fixation of aminopropyl groups on the surface of silica microspheres. The introduction

• was optimized controlling the synthesis conditions, such as concentrations of reactants, basicity of the medium, and the process temperature. Keywords: copper(II) ions; methyl groups; N- and F-containing functional groups; silica nanospheres; sol–gel processes; sorption; surface chemistry

• of stabilization and the relation to the activity in adsorption of copper(II) cations has been more recently discussed in the works of Soler-Illia and co-workers [36][37]. Using DFT calculations it was demonstrated that the protonated amino groups are irreversibly transmitting a proton to the Si–O

Layered composites of PEDOT/PSS/nanoparticles and PEDOT/PSS/phthalocyanines as electron mediators for sensors and biosensors

• Celia García-Hernández,
• Cristina García-Cabezón,
• Fernando Martín-Pedrosa,
• José Antonio De Saja and
• María Luz Rodríguez-Méndez

Beilstein J. Nanotechnol. 2016, 7, 1948–1959, doi:10.3762/bjnano.7.186

• ) and copper(II) phthalocyanine tetrasulfonic acid tetrasodium salt (CuPc, 0.05 g/L) were purchased from Sigma-Aldrich. Gold nanoparticle (AuNPs, 30–40 nm) colloids were synthesized according to a modification of the procedure proposed by Slot and Geuze [12][40]. Using this procedure, a red colloid with

Scanning probe microscopy studies on the adsorption of selected molecular dyes on titania

• Jakub S. Prauzner-Bechcicki,
• Lukasz Zajac,
• Piotr Olszowski,
• Res Jöhr,
• Antoine Hinaut,
• Thilo Glatzel,
• Bartosz Such,
• Ernst Meyer and
• Marek Szymonski

Beilstein J. Nanotechnol. 2016, 7, 1642–1653, doi:10.3762/bjnano.7.156

• ). Jöhr et al. used non-contact atomic force microscopy and KPMF to study the adsorption and interaction of copper(II) meso-tetra(4-carboxyphenyl)porphyrin (Cu-TCPP) on a TiO2(110) surface in a submonolayer coverage regime at room temperature [60]. First, the authors identified two dominant adsorption