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

• valence bands of CuO are at a more negative potential than those of ZnO to form type-II region bonds between CuO and ZnO, avoiding recombination and accelerating the separation of photogenerated electron–hole pairs [37]. To explore and confirm the effects of combining CuO and ZnO, we developed a

• 1.28, 1.03, 0.88, 0.61, and 0.42 mW·cm−2, respectively, owing to the fast charge separation at the p-type/n-type heterojunctions of CuO/ZnO. The separation of electron–hole pairs prolongs the lifetime of free electrons, leading to an enhanced photocurrent [45]. When the applied voltage is fixed at 2 V

Isolation of cubic Si₃P₄ in the form of nanocrystals

• Polina K. Nikiforova,
• Sergei S. Bubenov,
• Vadim B. Platonov,
• Andrey S. Kumskov,
• Nikolay N. Kononov,
• Tatyana A. Kuznetsova and
• Sergey G. Dorofeev

Beilstein J. Nanotechnol. 2023, 14, 971–979, doi:10.3762/bjnano.14.80

• minor separation occurring on the surface of the NPs [22][23]. The temperature (670 °C) and duration t of the preliminary experiment were chosen through the estimation of the diffusion length l from bulk silicon diffusion constants [24] using the following equation: where D is the diffusion constant

Metal-organic framework-based nanomaterials for CO₂ storage: A review

• Ha Huu Do,
• Iqra Rabani and
• Hai Bang Truong

Beilstein J. Nanotechnol. 2023, 14, 964–970, doi:10.3762/bjnano.14.79

• facile post-synthetic modifications, which allow for diverse strategies towards efficient adsorption and separation of gas molecules [15]. Among the nanosized MOFs, MOF-210 has demonstrated a remarkable ability to adsorb CO2 (54.5 mmol·g−1 at 50 bar, 298 K) owing to its large surface area of 6240 m2·g−1

• adsorption ability with OMSs ranging from 5.5 to 8.0 mmol·g−1 at 296 K and 1 bar [21]. Moreover, acid Lewis sites within these MOFs effectively interact with CO2, leading to increased adsorption. The pore size plays a vital role in the adsorption and separation of CO2 from gas mixtures because of the

• an intriguing strategy for enhancing gas storage and gas separation, encompassing species such as CH4, CO2, and N2. This approach involves the introduction of additional linkers to divide large pores into smaller compartments [33]. PSP not only offers an increased number of active sites but also

Biomimetics on the micro- and nanoscale – The 25th anniversary of the lotus effect

• Matthias Mail,
• Kerstin Koch,
• Thomas Speck,
• William M. Megill and
• Stanislav N. Gorb

Beilstein J. Nanotechnol. 2023, 14, 850–856, doi:10.3762/bjnano.14.69

• satisfactory nearly superhydrophobic material which the authors used to create an effective oil–water separation product they called nanopads. What this paper demonstrates, in addition to the not insignificant contribution it makes to the science of structured surfaces, is that with a bit of creativity and a

• repellency, but also on the capability of some surfaces to keep stable air layers under water – the so-called Salvinia Effect. Such air layers are of great importance for drag reduction (passive air lubrication), antifouling, sensor applications, or oil–water separation. Up to now, based on the

• dehumidifiers or water purifiers. The authors here present a model based on a carbon nanotube structure that might finally provide a route to the breakthrough in this field. Their archetype, the Namibian desert beetle, uses a geometric separation of hydrophilic and hydrophobic regions to harvest and drive water

Nanostructured lipid carriers containing benznidazole: physicochemical, biopharmaceutical and cellular in vitro studies

• Giuliana Muraca,
• María Esperanza Ruiz,
• Rocío C. Gambaro,
• Sebastián Scioli-Montoto,
• María Laura Sbaraglini,
• Gisel Padula,
• José Sebastián Cisneros,
• Cecilia Yamil Chain,
• Vera A. Álvarez,
• Cristián Huck-Iriart,
• Guillermo R. Castro,
• María Belén Piñero,
• Matias Ildebrando Marchetto,
• Catalina Alba Soto,
• Germán A. Islan and
• Alan Talevi

Beilstein J. Nanotechnol. 2023, 14, 804–818, doi:10.3762/bjnano.14.66

• the filtrate (i.e., the free drug concentration) in μg/mL, and Vf is the volume after ultrasonication (mL). The theoretical drug loading (DL%) was calculated as follows: HPLC analysis of benznidazole Chromatographic separation was achieved by HPLC (Gilson SAS, Villiers-Le-Bel, France) via UV detection

Nanoarchitectonics for advanced applications in energy, environment and biology: Method for everything in materials science

• Katsuhiko Ariga

Beilstein J. Nanotechnol. 2023, 14, 738–740, doi:10.3762/bjnano.14.60

• also discuss coordination-assembled myricetin nanoarchitectonics [32], nanoarchitectonics for membranes with enhanced gas separation capabilities [33], nanoarchitectonics of the cathode of Li–O2 batteries [34], nanoarchitectonics in moist-electric generation [35], nanoarchitectonics for drug delivery

Cross-sectional Kelvin probe force microscopy on III–V epitaxial multilayer stacks: challenges and perspectives

• Mattia da Lisca,
• José Alvarez,
• James P. Connolly,
• Nicolas Vaissiere,
• Karim Mekhazni,
• Jean Decobert and
• Jean-Paul Kleider

Beilstein J. Nanotechnol. 2023, 14, 725–737, doi:10.3762/bjnano.14.59

• expected trend in a p-type layer with surface defects. However, in case of pn junctions, the SPV can also include the contribution of the open-circuit voltage (VOC) of the pn junction due to the splitting of the quasi-Fermi levels of electrons and holes and the related charge separation at the junction. In

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

• , multistep separation procedure. A fluorescence polarisation immunoassay, which does not require a separation step, is one development that has been made to get around this restriction [22]. Furthermore, chromatographic techniques such as thin-layer chromatography (TLC), liquid chromatography-coupled mass

• limited resources. Additionally, the mobile phase utilized in the separation of antibiotics and hormones affects the chromatography’s ability to detect substances [23]. The advantages of SERS are its rapid detection time, affordable detection cost, and ease of use. It also has a number of drawbacks, such

• redox reaction during the electron deactivation process. For effective quenching, a complex driven by either hydrophobic, van der Waals, or π–π-stacking interactions is generated between the electron donor and the electron acceptor with a separation on a sub-nanometre length scale. The complexation of

Titania nanoparticles for photocatalytic degradation of ethanol under simulated solar light

• Evghenii Goncearenco,
• Iuliana P. Morjan,
• Claudiu Teodor Fleaca,
• Florian Dumitrache,
• Elena Dutu,
• Monica Scarisoreanu,
• Valentin Serban Teodorescu,
• Alexandra Sandulescu,
• Crina Anastasescu and
• Ioan Balint

Beilstein J. Nanotechnol. 2023, 14, 616–630, doi:10.3762/bjnano.14.51

• differences could promote the fabrication of new devices with higher efficiency in electron–hole separation [33]. There are a lot of methods to obtain TiO2 powder, from chemical reactions in solvents [34][35][36] to simple oxidation at high temperatures [37]. Every method has its particular yield and

On the use of Raman spectroscopy to characterize mass-produced graphene nanoplatelets

• Keith R. Paton,
• Konstantinos Despotelis,
• Naresh Kumar,
• Piers Turner and
• Andrew J. Pollard

Beilstein J. Nanotechnol. 2023, 14, 509–521, doi:10.3762/bjnano.14.42

• separation of unexfoliated materials. In this work we assess these metrics when applied to non-ideal samples, where unexfoliated graphite has been deliberately added to the exfoliated material. We demonstrate that previously published metrics, when applied to averaged spectra, do not allow the presence of

• ]. Again, it is not clear if the same metrics can be applied to measurements performed on bulk material, where flakes are restacked or reaggregated. As many GNP products are produced through top-down manufacturing methods, which typically have a GNP yield of less than 100%, there is often a separation step

• of GNP material is prepared through careful separation of unexfoliated material. Then, the observed changes for an averaged Raman spectrum are investigated while adding small amounts of graphite to the GNP sample. We then evaluate the ability of previously published metrics to identify the presence

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

• membranes with hydrophobic photothermal material particles. Over the past years, various types of SSG membranes have been studied [37][39][45][54][56][57]. These SSG membranes can be applied to, for example, seawater desalination and photocatalytic degradation by utilizing the photothermal and separation

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

Polymer nanoparticles from low-energy nanoemulsions for biomedical applications

• Santiago Grijalvo and
• Carlos Rodriguez-Abreu

Beilstein J. Nanotechnol. 2023, 14, 339–350, doi:10.3762/bjnano.14.29

• liquid phase. They are out-of-equilibrium nanocolloids in which phase separation is expected from thermodynamics, but is delayed by the presence of surfactants adsorbed on the droplets surface. Accordingly, nanoemulsion formation depends on the way the sample is prepared, for example, on the order of

Bismuth-based nanostructured photocatalysts for the remediation of antibiotics and organic dyes

• Akeem Adeyemi Oladipo and
• Faisal Suleiman Mustafa

Beilstein J. Nanotechnol. 2023, 14, 291–321, doi:10.3762/bjnano.14.26

• treat contaminated water and wastewater, including adsorption, bioremediation, precipitation, electrocoagulation, filtration, membrane separation, flocculation, centrifugation, advanced oxidation processes based on photocatalysis, and chemical coagulation [4][5][6][7][8][9][10][11]. Each of these

• carrier separation, high photo-transporter mobility, appropriate physical and chemical properties, sufficient band alignment to meet the kinetic requirements of the target reaction, and anti-corrosion stability in reactive environments [18][19][20]. Figure 1 depicts the mechanism of the photocatalyst. In

• surface charge, low carrier density, small electron effective mass, long electron mean free path, and extremely low band overlap energy, bismuth can transition from a semimetal to a semiconductor by shrinking its crystallite size [25][71][72][73][74][75][76][77]. To hasten the separation of photogenerated

Biocatalytic synthesis and ordered self-assembly of silica nanoparticles via a silica-binding peptide

• Mustafa Gungormus

Beilstein J. Nanotechnol. 2023, 14, 280–290, doi:10.3762/bjnano.14.25

• methods for manufacturing ordered structures of nanoparticles is an ongoing challenge. Ordered structures of SiO2 nanoparticles have gained increased attention due to the great potential they offer in filtering, separation, drug delivery, optics, electronics, and catalysis. Biomolecules, such as peptides

• gained increased attention due to the great potential they offer in filtering, separation, drug delivery, optics, electronics, and catalysis [1][2][3][4][5]. Nanoparticles with ordered 3D structures, such as supra-particles or super lattices, can possess properties that are not observed in the bulk

A distributed active patch antenna model of a Josephson oscillator

• Vladimir M. Krasnov

Beilstein J. Nanotechnol. 2023, 14, 151–164, doi:10.3762/bjnano.14.16

• . The array factor takes into account the interference of electromagnetic fields from the two slots in the far field. It depends on the separation between the slots, a, the relative phase shift, β, and the direction (φ,Θ). Since radiation from a patch antenna is induced by magnetic current lines, it is

Formation of nanoflowers: Au and Ni silicide cores surrounded by SiO_x branches

• Feitao Li,
• Siyao Wan,
• Dong Wang and
• Peter Schaaf

Beilstein J. Nanotechnol. 2023, 14, 133–140, doi:10.3762/bjnano.14.14

• between the positions of pure Au and Ni since only one main reflex should be observed when the two elements are completely mixed [20][23][25]. The annealing temperatures are above the miscibility gap [23][50]. Thus, the partial mixing comes from the phase separation of Au and Ni during cooling [25

• interdiffusion of Au, Ni, and Si. Au/Si phase separation occurs during cooling [3][55], and Ni silicide may remain stable down to room temperature [41][42][43][44][45][46], finally forming particles with two contrasts. Besides, Ni may also diffuse into the Si substrate, leading to the formation of the Ni

Intermodal coupling spectroscopy of mechanical modes in microcantilevers

• Ioan Ignat,
• Bernhard Schuster,
• Jonas Hafner,
• MinHee Kwon,
• Daniel Platz and
• Ulrich Schmid

Beilstein J. Nanotechnol. 2023, 14, 123–132, doi:10.3762/bjnano.14.13

• –T3, which has a regime transition. Inset: Coupling rates determined from linewidth changes or eigenmode separation against half the linewidth of cavity mode T3. (b) Matrix showing the coupling rates of all mode combinations. Contoured squares represent combinations between flexural modes only. (c

Characterisation of a micrometer-scale active plasmonic element by means of complementary computational and experimental methods

• Ciarán Barron,
• Giulia Di Fazio,
• Samuel Kenny,
• Silas O’Toole,
• Robin O’Reilly and
• Dominic Zerulla

Beilstein J. Nanotechnol. 2023, 14, 110–122, doi:10.3762/bjnano.14.12

• ] investigated the effects of gap size using a fine tunable mechanical separation as a means to control the intensity of a travelling SPP on silver. In contrast, in the present work, the modulation of the device’s response is obtained through changes in the optical constants via electrical signals. It is well

Two-step single-reactor synthesis of oleic acid- or undecylenic acid-stabilized magnetic nanoparticles by thermal decomposition

• Mykhailo Nahorniak,
• Pamela Pasetto,
• Jean-Marc Greneche,
• Volodymyr Samaryk,
• Sandy Auguste,
• Anthony Rousseau,
• Nataliya Nosova and
• Serhii Varvarenko

Beilstein J. Nanotechnol. 2023, 14, 11–22, doi:10.3762/bjnano.14.2

• purchased from Merck KGaA (Darmstadt, Germany). Oleic acid (OA, 98%) was bought from Lachema (Brno, Czech Republic). For magnetic separation, a permanent cylindrical neodymium magnet (NdFeB; 45 × 15 mm), with an induction on the surface of 1.2 T, was used. To characterize the size, morphology, hydrodynamic

• -octadecene. The stirring was continued for 30 min. The resulting reaction mass was transferred into a 250 mL reactor equipped with a mechanical stirrer and washed five times with propanone (150 mL each time) followed by nanoparticle deposition by magnetic separation on a NdFeB magnet under argon. The

Observation of collective excitation of surface plasmon resonances in large Josephson junction arrays

• Roger Cattaneo,
• Mikhail A. Galin and
• Vladimir M. Krasnov

Beilstein J. Nanotechnol. 2022, 13, 1578–1588, doi:10.3762/bjnano.13.132

• found in [9][34][36][37]. The meander array (Figure 1a) has seven identical (vertical) sections with N = 1000 JJs in each and with an overall size in the vertical direction of 6.25 mm. Each section consists of 125 horizontal segments with a length of 230 μm, a width of 10 μm, and a separation of 40 μm

• (Figure 1c) contains five straight sections (lines) with N = 332 JJs in each. The spacing between the lines is 6 μm. Sizes and separation of the JJs is the same as for the meander array. The two outermost lines in the linear array and all seven sections of the meander array can be measured independently

• steps with small separation in voltage. The linear array, Figure 1d, exhibits several evenly spaced steps. The I–V characteristics are hysteretic, with the retrapping current being significantly smaller than the switching current. The hysteresis leads to a metastability, which allows for the observation

Single-step extraction of small-diameter single-walled carbon nanotubes in the presence of riboflavin

• Polina M. Kalachikova,
• Anastasia E. Goldt,
• Eldar M. Khabushev,
• Timofei V. Eremin,
• Timofei S. Zatsepin,
• Elena D. Obraztsova,
• Konstantin V. Larionov,
• Liubov Yu. Antipina,
• Pavel B. Sorokin and
• Albert G. Nasibulin

Beilstein J. Nanotechnol. 2022, 13, 1564–1571, doi:10.3762/bjnano.13.130

• facilitate chirality separation. Conventional surfactants such as sodium dodecyl sulfate (SDS) and sodium deoxycholate (DOC), as well as polyethylene glycol-based compositions, are used to obtain high-quality dispersions of individual SWCNTs [3][4][5][10]. Although given surfactants show exemplary

• performance in both individualization and chirality separation of carbon nanotubes, excessive surfactant concentrations are usually required for their complete individualization [2][8][11]. Such excess subsequently introduces an additional step of surfactant removal to recover the SWCNTs in a pristine state

• solubilize SWCNTs, no data on chirality separation of SWCNTs using pure aqueous riboflavin is available to date. Here, we report the dispersion of single-walled carbon nanotubes by aqueous riboflavin solution to extract a small-diameter fraction of SWCNTs from polydisperse samples by highly-efficient single

Photoelectrochemical water oxidation over TiO₂ nanotubes modified with MoS₂ and g-C₃N₄

• Phuong Hoang Nguyen,
• Thi Minh Cao,
• Tho Truong Nguyen,
• Hien Duy Tong and
• Viet Van Pham

Beilstein J. Nanotechnol. 2022, 13, 1541–1550, doi:10.3762/bjnano.13.127

• light, which can be explained as follows: The photocurrent density of MoS2/TNAs promptly increased because of the efficient separation of the e−–h+ pairs at the interfaces between TNAs and MoS2 [58] and the rapid transfer of the photo-induced electrons from MoS2 to the TNAs electrode [59]. This result

A TiO₂@MWCNTs nanocomposite photoanode for solar-driven water splitting

• Anh Quynh Huu Le,
• Ngoc Nhu Thi Nguyen,
• Hai Duy Tran,
• Van-Huy Nguyen and
• Le-Hai Tran

Beilstein J. Nanotechnol. 2022, 13, 1520–1530, doi:10.3762/bjnano.13.125

• been developed to increase the absorption of visible solar light [6][7]. Notably, carbon nanotubes (CNTs) are a promising material for visible-light absorption [8]. A combination of TiO2 with CNTs can effectively enhance the separation of e−/h+ pairs based on the high electric conductivity of CNTs

In search of cytotoxic selectivity on cancer cells with biogenically synthesized Ag/AgCl nanoparticles

• Mitzi J. Ramírez-Hernández,
• Mario Valera-Zaragoza,
• Omar Viñas-Bravo,
• Ariana A. Huerta-Heredia,
• Miguel A. Peña-Rico,
• Erick A. Juarez-Arellano,
• David Paniagua-Vega,
• Eduardo Ramírez-Vargas and
• Saúl Sánchez-Valdes

Beilstein J. Nanotechnol. 2022, 13, 1505–1519, doi:10.3762/bjnano.13.124

• crystallite size as a function of temperature is more noticeable for Ag than for AgCl, where an increasing trend in Ag crystallite size is observed up to 80 °C. It is speculated that at this temperature, the separation of salt ions and the interaction with reducing biological compounds are favorable, which