A review of metal-organic frameworks and polymers in mixed matrix membranes for CO₂ capture

• Charlotte Skjold Qvist Christensen,
• Nicholas Hansen,
• Mahboubeh Motadayen,
• Nina Lock,
• Martin Lahn Henriksen and
• Jonathan Quinson

Beilstein J. Nanotechnol. 2025, 16, 155–186, doi:10.3762/bjnano.16.14

TiO₂ immobilized on 2D mordenite: effect of hydrolysis conditions on structural, textural, and optical characteristics of the nanocomposites

• Marina G. Shelyapina,
• Rosario Isidro Yocupicio-Gaxiola,
• Gleb A. Valkovsky and
• Vitalii Petranovskii

Beilstein J. Nanotechnol. 2025, 16, 128–140, doi:10.3762/bjnano.16.12

• noted that very often in zeolites the peak at 74.5–74.8 eV is attributed to the presence of Al2O3 [35][36]; however, as it will be shown further, this contradicts to the 27Al NMR spectra. The Ti 2p XPS spectra of the Ti-WNh-C and Ti-ENh-C samples show peaks corresponding to Ti 2p1/2 (464.6 eV) and Ti

Mn-doped ZnO nanopowders prepared by sol–gel and microwave-assisted sol–gel methods and their photocatalytic properties

• Cristina Maria Vlăduț,
• Crina Anastasescu,
• Silviu Preda,
• Oana Catalina Mocioiu,
• Simona Petrescu,
• Jeanina Pandele-Cusu,
• Dana Culita,
• Veronica Bratan,
• Ioan Balint and
• Maria Zaharescu

Beilstein J. Nanotechnol. 2024, 15, 1283–1296, doi:10.3762/bjnano.15.104

• thermogravimetric analysis (TGA) were used to determine the thermal behavior of the synthetized powders by using a Mettler Toledo TGA/DTA 851e apparatus with Al2O3 crucibles and flowing air atmosphere at 80 mL/min. The maximum temperature was set at 1000 °C and the heating rate was 5 °C/min. The surface

Introducing third-generation periodic table descriptors for nano-qRASTR modeling of zebrafish toxicity of metal oxide nanoparticles

• Supratik Kar and
• Siyun Yang

Beilstein J. Nanotechnol. 2024, 15, 1142–1152, doi:10.3762/bjnano.15.93

• three generations are computed and employed for modeling. All descriptor values can be found in Supporting Information File 1. Also, an example calculation of all descriptors for Al2O3 is given in Supporting Information File 1. Splitting of the dataset The selection of training and test sets was based

• Al2O3 has a relatively large CVsim(LK) value (1.25), while Mn2O3 has a relatively small CVsim(LK) value of 1.06; their corresponding %EI values are 3.44 and 17.2, respectively. Quality of the nano-qRASTR model The quality of the nano-qRASTR model was also checked according to the criterion by Golbraikh

Elastic modulus of β-Ga₂O₃ nanowires measured by resonance and three-point bending techniques

• Annamarija Trausa,
• Sven Oras,
• Sergei Vlassov,
• Mikk Antsov,
• Tauno Tiirats,
• Andreas Kyritsakis,
• Boris Polyakov and
• Edgars Butanovs

Beilstein J. Nanotechnol. 2024, 15, 704–712, doi:10.3762/bjnano.15.58

• . [35] measured a lower (up to 16%) elastic modulus for Al2O3 NBs in comparison to the theoretical value and attributed this difference to oxygen vacancies within NBs. As per our previous study [36], our as-grown Ga2O3 NWs exhibit a strong photoluminescence band related to oxygen vacancies, indicating a

Aero-ZnS prepared by physical vapor transport on three-dimensional networks of sacrificial ZnO microtetrapods

• Veaceslav Ursaki,
• Tudor Braniste,
• Victor Zalamai,
• Emil Rusu,
• Vladimir Ciobanu,
• Vadim Morari,
• Daniel Podgornii,
• Pier Carlo Ricci,
• Rainer Adelung and
• Ion Tiginyanu

Beilstein J. Nanotechnol. 2024, 15, 490–499, doi:10.3762/bjnano.15.44

• metal oxides [1][9][10]. Metal oxides include TiO2, ZnO, Al2O3, WO3, Cu2O, CuO, SnO2, Fe2O3, Bi2O3, Ag3PO4, BiWO4, BiVO4, BiFeO3, and SeTiO3, while chalcogenides are represented by ZnS, ZnSe, CdS, PbS, CdSe, SnS2, and Bi2S3. Among porous semiconductor materials, recently developed super-lightweight ones

Exploring the relationships between physiochemical properties of nanoparticles and cell damage to combat cancer growth using simple periodic table-based descriptors

• Joyita Roy and
• Kunal Roy

Beilstein J. Nanotechnol. 2024, 15, 297–309, doi:10.3762/bjnano.15.27

• signifies the low electron affinity of the metal oxide to accept electrons. This means that the metal has a propensity of having a cationic charge, which leads to the catalytic power of metal cations. For example, in WO3, the metal alpha value is 7.2 and cell damage is −4.57. In contrast, Al2O3 with a metal

In situ optical sub-wavelength thickness control of porous anodic aluminum oxide

• Aleksandrs Dutovs,
• Raimonds Popļausks,
• Oskars Putāns,
• Vladislavs Perkanuks,
• Aušrinė Jurkevičiūtė,
• Tomas Tamulevičius,
• Uldis Malinovskis,
• Iryna Olyshevets,
• Donats Erts and
• Juris Prikulis

Beilstein J. Nanotechnol. 2024, 15, 126–133, doi:10.3762/bjnano.15.12

• achieve precise optical characterization, one could employ spectroscopic ellipsometry (SE) with more refined division into sub-layers [26] and consider additional material properties, such as the anisotropy of PAAO [27] and the optical dispersion of the refractive index (RI) of Al2O3 [28]. However, for

• anodization, however, the pores are filled with electrolyte and reaction products. Therefore the value neff = 1.65 used for in situ thickness control was higher than that of dry PAAO and lower than that of pure Al2O3. It resulted in satisfactory fits of the TMM model function to the recorded reflectance

Hierarchically patterned polyurethane microgrooves featuring nanopillars or nanoholes for neurite elongation and alignment

• Lester Uy Vinzons,
• Guo-Chung Dong and
• Shu-Ping Lin

Beilstein J. Nanotechnol. 2023, 14, 1157–1168, doi:10.3762/bjnano.14.96

• microenvironment. While several of these focused on stem cell differentiation [9][10], a couple of studies explored their effects on axonal guidance. Lee et al. [11] found that nanorough microridges composed of laser-patterned Al/Al2O3 nanowires increase cell attachment and effectively guide dorsal root ganglia

Experimental investigation of usage of POE lubricants with Al₂O₃, graphene or CNT nanoparticles in a refrigeration compressor

• Kayhan Dağıdır and
• Kemal Bilen

Beilstein J. Nanotechnol. 2023, 14, 1041–1058, doi:10.3762/bjnano.14.86

• Kayhan Dagidir Kemal Bilen Department of Mechanical Engineering, Tarsus University, Mersin, Turkey Department of Mechanical Engineering, Ankara Yıldırım Beyazıt University, Ankara, Turkey 10.3762/bjnano.14.86 Abstract In this study, the use of nanolubricants containing Al2O3, graphene, and carbon

• lubricant to determine the optimum nanoparticle mass fraction for each nanoparticle type. Thus, it was found that the compressor operated safely and efficiently with nanolubricants. Furthermore, the optimum mass fractions were determined to be 0.750% for Al2O3, 0.250% for graphene, and 0.250% for CNTs for

• operating conditions of this study. As a result, the required electrical power of the compressor decreased by 6.26, 6.82, and 5.55% with the addition of Al2O3, graphene, and CNT nanoparticles at optimum mass fractions of 0.750, 0.250, and 0.250% to the lubricant, respectively, compared to the compressor

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

• sample (alumina) (Figure 1a) shows single-phase θ-Al2O3, which is an alumina phase obtained through heat treatment above 900 °C [16]. In the diffractogram of sample 1 (Figure 1b), two phases are observed, θ-Al2O3 [96-120-0006] and eskolaite α-Cr2O3 [96-901-6564]. The crystal structure of the eskolaite

• phase is that of corundum (Al2O3), based on a hexagonal matrix of oxygen with two thirds of the octahedral sites filled with Cr3+ ions [17]. The phase mixture observed in sample 2 (Figure 1c) consists of α-Al2O3 [96-900-8082] and hematite (α-Fe2O3) [96-591-0083]. The indexing of the hematite phase

• Table 2. The relative amount of the coloring ions evaluated by XPS is approximately 12 wt % in both samples. The XPS spectra recorded in the Al 2p core level region (Figure 4a,b,d) show a peak fitted with one component centered at 73.6 eV. This component indicates the presence of Al2O3 in all samples

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

Straight roads into nowhere – obvious and not-so-obvious biological models for ferrophobic surfaces

• Wilfried Konrad,
• Christoph Neinhuis and
• Anita Roth-Nebelsick

Beilstein J. Nanotechnol. 2022, 13, 1345–1360, doi:10.3762/bjnano.13.111

• and copper amounts to θ ≈ 37°. Equation 1, however, requires clearly θ > 90°. The solution of this problem was to coat the copper surface with corundum (Al2O3), a material on which iron exhibits a contact angle of θ ≈ 130°. Equation 2 implies that the acute angle of the cone should then be in the

Enhanced electronic transport properties of Te roll-like nanostructures

• E. R. Viana,
• N. Cifuentes and
• J. C. González

Beilstein J. Nanotechnol. 2022, 13, 1284–1291, doi:10.3762/bjnano.13.106

• capping with Al2O3 [12]. Theoretical works have also demonstrated that field-effect transistors (FETs) with single n-type trigonal Te NWs outperform the ones built with three trigonal Te NWs [14]. One important group of nanostructures, different from hollow nanotubes and solid nanowires, is NBs. NBs have

Role of titanium and organic precursors in molecular layer deposition of “titanicone” hybrid materials

• Arbresha Muriqi and
• Michael Nolan

Beilstein J. Nanotechnol. 2022, 13, 1240–1255, doi:10.3762/bjnano.13.103

• initial MLD reactions in titanicone film growth using three different surface models: anatase TiO2, rutile TiO2 and Al2O3. Calculated energetics show that while TiCl4 is reactive towards the anatase and rutile TiO2 surfaces, it is not reactive towards the Al2O3 surface. Ti(DMA)4 is reactive towards all

• . In this study we investigate the molecular mechanism of formation of titanicone films on anatase TiO2, rutile TiO2 and Al2O3 surfaces using TiCl4 or Ti(DMA)4 as Ti source and EG or GL as organic components. Calculated energetics suggest a higher reactivity of Ti(DMA)4 towards the selected surfaces

• ]. Titanicone films were modelled on an anatase TiO2 (101) surface with a coverage of 1 ML OH, rutile TiO2 (110) surface with a coverage of 0.75 ML OH, and an Al2O3 (0001) surface at a coverage 0.50 ML OH [50][51]. These surface models interact with titanium tetrachloride (TiCl4) and tetrakis(dimethylamido

Design of surface nanostructures for chirality sensing based on quartz crystal microbalance

• Yinglin Ma,
• Xiangyun Xiao and
• Qingmin Ji

Beilstein J. Nanotechnol. 2022, 13, 1201–1219, doi:10.3762/bjnano.13.100

• structure. The research group also prepared chiral Al2O3 films by a similar process using SAMs of cysteine (Cys) and KAl2(AlSi3O10)(OH)2 precursors (Figure 10) [121]. The resultant Al2O3 films were efficiently deposited on the SAMs and formed a very smooth and conformal film with a thickness of (8.9 ± 0.1

• ) nm. The QCM measurements exhibited a 690 ng/cm2 difference between the adsorption amount of ᴅ- and ʟ-tartaric acid, and it proved the enantioselective adsorption on the chirality imprinted Al2O3 films. Yemini et al. reported the fabrication of Zn/Cys chiral nanostructures by molecular layer

Application of nanoarchitectonics in moist-electric generation

• Jia-Cheng Feng and
• Hong Xia

Beilstein J. Nanotechnol. 2022, 13, 1185–1200, doi:10.3762/bjnano.13.99

• can be easily grown on substrates to form nanoscale networks and perform well in MEGs due to their unique electron transport properties [2][47][48]. This includes Al2O3 [49], MoS2 [50][51], Ni–Al layered double hydroxide (LDH) [52], MoS2/SiO2 composites [53], TiO2 [54], and Ti3C2Tx MXene nanosheets

• [55]. A hydroelectric conversion device prepared by suction filtration of 200 nm Al2O3 nanoparticles provided an instantaneous electrical output of 4 V and 18 μA (Figure 4a). The Ni–Al layered double hydroxide material has a high specific surface area and provided a constant electrical output with a

• is the highest instantaneous current measured in nanomaterial MEG devices. Moreover, the preparation method of metal compound nanomaterials is mature, and different morphologies can be obtained, such as nanoparticles of Al2O3, nanowires of TiO2, Ni–Al layered structures, and nanosheets of MXene

A cantilever-based, ultrahigh-vacuum, low-temperature scanning probe instrument for multidimensional scanning force microscopy

• Hao Liu,
• Zuned Ahmed,
• Sasa Vranjkovic,
• Manfred Parschau,
• Andrada-Oana Mandru and
• Hans J. Hug

Beilstein J. Nanotechnol. 2022, 13, 1120–1140, doi:10.3762/bjnano.13.95

• stacks of the x-positioning unit are attached close to the top of the z-sliding unit (Figure 5a). The x- and y-sliders both use three shear piezo stacks and confine the motion along these directions by sliding an Al2O3 sphere attached to the shear stack inside a gap formed by two sapphire cylinders. The

• sphere running on a hardened steel plate. Note that initially a sapphire plate was used. However, we found the plate cracked after a few days of piezo motor operation, presumably caused from an ultrasound-actuated contact resonance of the Al2O3 sphere on the sapphire plate arising from the triangular

Optimizing PMMA solutions to suppress contamination in the transfer of CVD graphene for batch production

• Chun-Da Liao,
• Andrea Capasso,
• Tiago Queirós,
• Telma Domingues,
• Fatima Cerqueira,
• Nicoleta Nicoara,
• Jérôme Borme,
• Paulo Freitas and
• Pedro Alpuim

Beilstein J. Nanotechnol. 2022, 13, 796–806, doi:10.3762/bjnano.13.70

• : C4 PMMA; Wafer 2: B2 PMMA). Both wafers started with the patterning of Cr/Au contacts (deposited by magnetron sputtering) using direct-write laser lithography and ion milling. The fabrication of the two wafers followed slightly different steps, as described below. Wafer 1: A stopping layer (Al2O3

• /TiWN/AlSiCu/TiWN) was patterned by lift-off, followed by the CVD growth of a multi-stack layer of SiO2 and Si3N4 to passivate the current lines. After this, a thin Al2O3 layer was deposited by sputtering and patterned by wet etching to protect the gate during the graphene etch. The C4 PMMA/graphene

• films were then transferred onto the patterned wafer until all device areas were covered. After removing the PMMA, graphene was patterned using optical lithography and oxygen plasma etching. Finally, the sacrificial layer was removed by wet etching. Wafer 2: An additional layer of Al2O3 was deposited on

Comparative molecular dynamics simulations of thermal conductivities of aqueous and hydrocarbon nanofluids

• Adil Loya,
• Antash Najib,
• Fahad Aziz,
• Asif Khan,
• Guogang Ren and
• Kun Luo

Beilstein J. Nanotechnol. 2022, 13, 620–628, doi:10.3762/bjnano.13.54

• study was carried out with different shapes (i.e., cylinder, platelet, and sphere) of nanoparticles (Cu/Al2O3 with ethylene glycol as the base fluid) using the finite element method (FEM) in MAPLE 18.0. For mathematical modelling and simulation of hybrid nanofluids, Shah et al. [33] considered a two

• conductive properties of base fluids. Raja et al. [34] carried out an experiment in which a comparative study of the thermal behaviour of normal and hybrid nanofluids (Al2O3/H2O, CuO/H2O and Al2O3–CuO/H2O) was observed. Hybrid nanofluids (Al2O3–CuO/H2O) showed greater enhancement in thermal properties than

• other conventional nanofluids (CuO/H2O, Al2O3/H2O). However, the relationship between the increase in volume fraction and improved thermal properties remained linear. They also observed that experimental values were much higher than the values predicted by models presented in the literature. To further

Tubular glassy carbon microneedles with fullerene-like tips for biomedical applications

• Sharali Malik and
• George E. Kostakis

Beilstein J. Nanotechnol. 2022, 13, 455–461, doi:10.3762/bjnano.13.38

• prepared by flowing methane (CH4) at a rate of 40 sccm for 12 h at p = 200 mbar and a gas temperature of 1020 °C through a 20 mm diameter alumina (Al2O3) tube (15 mm internal diameter), which was then cooled under argon (Ar). Characterization The prepared glassy carbon microneedles were characterized by

Selected properties of Al_xZn_yO thin films prepared by reactive pulsed magnetron sputtering using a two-element Zn/Al target

• Witold Posadowski,
• Artur Wiatrowski,
• Jarosław Domaradzki and
• Michał Mazur

Beilstein J. Nanotechnol. 2022, 13, 344–354, doi:10.3762/bjnano.13.29

• many preliminary experiments to find optimum conditions for the deposition of thin films with desired properties. For the deposition of AZO thin films by magnetron sputtering, the most commonly used targets are made of sintered zinc oxide powders and aluminum oxide (ZnO/Al2O3). The optimal percentage

• the performed measurements, it was favorable to analyze the Al/Zn ratio because both elements are not light elements. However, it should be taken into account that AZO thin films are composed of at least 50 atom % O (ZnO/Al2O3 compound). In the case of the results here, the Al content should be at

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

• methods of MOF membrane preparation require multiple steps and high-pressure conditions. In this study, a reliable one-step interfacial synthesis method under atmospheric pressure has been developed to prepare zeolitic imidazolate framework-8 (ZIF-8) membranes supported on porous α-Al2O3 disks. To obtain

• order to understand (a) the relationship between synthesis method and intercrystalline structure, (b) the relationship between ZIF-8 crystal structural in the film and the associated gas separation performance, and (c) the effect of α-Al2O3 support on membrane separation performance, free-standing ZIF-8

• films were synthesized via an interfacial method, while an interfacial method and a counter-diffusion method were adopted to synthesize α-Al2O3-supported ZIF-8 membranes for CO2/N2 gas separation. Materials and Methods Chemicals Zinc nitrate hexahydrate, 2-methylimidazole (2-MIM), sodium formate of

Impact of device design on the electronic and optoelectronic properties of integrated Ru-terpyridine complexes

• Max Mennicken,
• Sophia Katharina Peter,
• Corinna Kaulen,
• Ulrich Simon and
• Silvia Karthäuser

Beilstein J. Nanotechnol. 2022, 13, 219–229, doi:10.3762/bjnano.13.16

• nanoelectrodes separated by gaps of 8 to 20 nm. They are fabricated by electron beam lithography (EBL) in a lift-off process while using a self-aligned Al2O3 hard mask to define the nanogap size [20][21]. The resulting nanoelectrode pairs are used for the on-chip preparation of Ru(TP)2-complex wires according to

Plasmon-enhanced photoluminescence from TiO₂ and TeO₂ thin films doped by Eu³⁺ for optoelectronic applications

• Marcin Łapiński,
• Jakub Czubek,
• Katarzyna Drozdowska,
• Anna Synak,
• Wojciech Sadowski and
• Barbara Kościelska

Beilstein J. Nanotechnol. 2021, 12, 1271–1278, doi:10.3762/bjnano.12.94

• were annealed at 550 °C for 15 min in air atmosphere. The formation of metallic nanostructures has been described in detail in our previous works [24][25][26]. On the prepared plasmonic platforms a dielectric buffer layer was deposited. We chose two kinds of layers. The first one, Al2O3, with different

• strongly redshifted in comparison to plasmon platform characteristics (Figure 3). This phenomenon is directly related to Mie’s theory and can be caused by changes of the electric permittivity over the gold nanostructures [7][8][33]. A shift is also observed in structures with an additional ultrathin Al2O3

• film. However, a blueshift occurs here due to the electrical properties of aluminum oxide. Additionally, it can be seen, that the position of the minimum of transmission as function of the Al2O3 film thickness. This may be explained by the different permittivity of the layers [34][35][36]. Emission and