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Search for "trapping" in Full Text gives 175 result(s) in Beilstein Journal of Nanotechnology.

Recent trends in Bi-based nanomaterials: challenges, fabrication, enhancement techniques, and environmental applications

  • Vishal Dutta,
  • Ankush Chauhan,
  • Ritesh Verma,
  • C. Gopalkrishnan and
  • Van-Huy Nguyen

Beilstein J. Nanotechnol. 2022, 13, 1316–1336, doi:10.3762/bjnano.13.109

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  • activity was found to be significantly increased. This improvement was ascribed to the efficient interfacial charge transfer obtained as a consequence of the process. According to the active species trapping study, the photocatalysis process is significantly aided by the presence of photogenerated holes
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Published 11 Nov 2022

Rapid fabrication of MgO@g-C3N4 heterojunctions for photocatalytic nitric oxide removal

  • Minh-Thuan Pham,
  • Duyen P. H. Tran,
  • Xuan-Thanh Bui and
  • Sheng-Jie You

Beilstein J. Nanotechnol. 2022, 13, 1141–1154, doi:10.3762/bjnano.13.96

Graphical Abstract
  • conversion, DeNOx index, apparent quantum efficiency, trapping tests, and electron spin resonance measurements were carried out to understand the photocatalytic mechanism of the materials. The high reusability of the MgO@g-C3N4 heterojunction was shown by a five-cycle recycling test. This study provides a
  • and urea and, subsequently, characterized. Charge transfer dynamics in the heterojunction and band structure were investigated to understand the effect of the heterojunction on the photocatalytic activity. Finally, the photocatalytic pathway of the MgO@g-C3N4 heterojunction was studied via trapping
  • (HR-XPS). The photoluminescence (PL) spectra of the materials was carried out in the form of fluorescence analysis with an excitation wavelength range of 200–900 nm. Finally, the photocatalytic mechanism was determined by trapping tests and ESR measurements. Photocatalytic performance The
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Published 18 Oct 2022

Spindle-like MIL101(Fe) decorated with Bi2O3 nanoparticles for enhanced degradation of chlortetracycline under visible-light irradiation

  • Chen-chen Hao,
  • Fang-yan Chen,
  • Kun Bian,
  • Yu-bin Tang and
  • Wei-long Shi

Beilstein J. Nanotechnol. 2022, 13, 1038–1050, doi:10.3762/bjnano.13.91

Graphical Abstract
  • investigated by radical trapping test. Ethylenediaminetetraacetic acid disodium (EDTA-2Na), isopropanol (IPA), and vitamin C (VC) were used as scavengers for holes (h+), hydroxyl radicals (•OH), and superoxide radicals (•O2−), respectively. Figure 8a shows the degradation rate of CTC in the presence of three
  • signal of h+ in the dark is stronger than that under visible-light irradiation, which indicates that h+ plays a role in photocatalytic reaction progress. This result is in accordance with that of the radical trapping test. In order to account for the formation of the active species and reveal the
  • results from radical trapping and ESR experiments. Thus, the Z-scheme charge-transfer model is expected to clarify the photocatalytic mechanism of BOM-20 for degradation of CTC. As illustrated in Figure 10, under visible-light irradiation, MIL101(Fe) and Bi2O3 can be excited to produce e− and
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Published 28 Sep 2022

Hierachical epicuticular wax coverage on leaves of Deschampsia antarctica as a possible adaptation to severe environmental conditions

  • Elena V. Gorb,
  • Iryna A. Kozeretska and
  • Stanislav N. Gorb

Beilstein J. Nanotechnol. 2022, 13, 807–816, doi:10.3762/bjnano.13.71

Graphical Abstract
  • -layered, with superimposed wax platelets connected through stalks formed as outgrowths of lower projections) was previously found in trapping organs (pitchers) of several representatives of the carnivorous plants from the genus Nepenthes (Nepenthaceae) such as N. alata Blanco, N. fusca Danser, N
  • . macrophylla Jebb and Cheek, N. mirabilis (Lour.) Druce, and N. rafflesiana Jack [16][17]. The waxy (slippery) zone located inside the pitchers is highly specialized for trapping and retaining of insect prey mainly due to contamination of attachment organs of insects [16], reduction of the real contact area
  • remain fully functional in terms of insect trapping owing to the presence of rather stable lower-layer wax projections [16][17]. Taking into account the above consideration about the Nepenthes wax, we suggest for leaves of D. antarctica that the presence of the two wax layers increases the chance of the
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Published 22 Aug 2022

Direct measurement of surface photovoltage by AC bias Kelvin probe force microscopy

  • Masato Miyazaki,
  • Yasuhiro Sugawara and
  • Yan Jun Li

Beilstein J. Nanotechnol. 2022, 13, 712–720, doi:10.3762/bjnano.13.63

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  • [55][56]. The calculated LD is consistent with the spatial extent of the local SPV observed by AC-KPFM. We could not find any correlation between the topographic and SPV images. The origin of the inhomogeneous SPV would involve the local distribution of the defect concentration, trapping sites, and an
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Published 25 Jul 2022

Tin dioxide nanomaterial-based photocatalysts for nitrogen oxide oxidation: a review

  • Viet Van Pham,
  • Hong-Huy Tran,
  • Thao Kim Truong and
  • Thi Minh Cao

Beilstein J. Nanotechnol. 2022, 13, 96–113, doi:10.3762/bjnano.13.7

Graphical Abstract
  • reports still proposed its photocatalytic behaviors partly based on •O2− species via the combination of experimental physicochemical analyses, such as electron spin resonance (ESR) spectroscopy, active species trapping experiments, valence band X-ray photoelectron spectroscopy (XPS), and diffuse
  • •O2− radicals played a primary role in the photocatalytic NO oxidation. Additionally, using photoluminescence (PL) spectroscopy, XPS, active species trapping tests, and ESR spectroscopy, the authors studied the photoinduced charge migration and trapping. They proposed the band structure of the SnO2
  • density functional theory (DFT) calculations, trapping experiments, and electron spin resonance measurements (Figure 10). Thus, the impact of intrinsic OVs within SnO2 NPs and the resulting S-scheme heterojunction on the band structure, charge transfer, and photocatalytic activity was presented. The
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Published 21 Jan 2022

Sputtering onto liquids: a critical review

  • Anastasiya Sergievskaya,
  • Adrien Chauvin and
  • Stephanos Konstantinidis

Beilstein J. Nanotechnol. 2022, 13, 10–53, doi:10.3762/bjnano.13.2

Graphical Abstract
  • electric fields, the latter being generated by the negative voltage applied to the cathode, allow for trapping the plasma electrons near the target surface to enhance gas ionization in that region. Consequently, the ion flux towards the target and the corresponding cathode current is significantly
  • discussed in [33][34] while n is an indication of the electron-trapping efficiency. Since the discharge current is dramatically increased because the ionization efficiency of the gas is augmented, the gas pressure can be substantially decreased, typically in the millitorr (roughly pascal) range, as compared
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Published 04 Jan 2022

Design aspects of Bi2Sr2CaCu2O8+δ THz sources: optimization of thermal and radiative properties

  • Mikhail M. Krasnov,
  • Natalia D. Novikova,
  • Roger Cattaneo,
  • Alexey A. Kalenyuk and
  • Vladimir M. Krasnov

Beilstein J. Nanotechnol. 2021, 12, 1392–1403, doi:10.3762/bjnano.12.103

Graphical Abstract
  • /2πfC ≃ 0.03–0.3 Ω, much smaller than the wave impedance of the free space, ≃ 377 Ω. This leads to trapping of EMW in the electrode/crystal capacitance, which shunts open space and prevents emission. To the contrary, for the whisker-based device, Figure 6c, the field goes out of the mesa as can be seen
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Published 21 Dec 2021

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

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  • oxygen doping have proven to enhance the immobilization of sodium polysulfides leading to an advancement in battery performance [31][32]. Adsorption and trapping of polysulfides are achieved through strong interactions between the sodium atoms in sodium polysulfides and the nitrogen and oxygen atoms. The
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Published 09 Sep 2021

Comprehensive review on ultrasound-responsive theranostic nanomaterials: mechanisms, structures and medical applications

  • Sepand Tehrani Fateh,
  • Lida Moradi,
  • Elmira Kohan,
  • Michael R. Hamblin and
  • Amin Shiralizadeh Dezfuli

Beilstein J. Nanotechnol. 2021, 12, 808–862, doi:10.3762/bjnano.12.64

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Published 11 Aug 2021

9.1% efficient zinc oxide/silicon solar cells on a 50 μm thick Si absorber

  • Rafal Pietruszka,
  • Bartlomiej S. Witkowski,
  • Monika Ozga,
  • Katarzyna Gwozdz,
  • Ewa Placzek-Popko and
  • Marek Godlewski

Beilstein J. Nanotechnol. 2021, 12, 766–774, doi:10.3762/bjnano.12.60

Graphical Abstract
  • the light-trapping effect. The impact of light-trapping on the operation of solar cells is presented by means of current–voltage curves. In contrast, sample B showed a flat surface morphology. The average RMS roughness value was 9 nm. Therefore, interference peaks in external quantum efficiency (EQE
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Published 21 Jul 2021

Recent progress in actuation technologies of micro/nanorobots

  • Ke Xu and
  • Bing Liu

Beilstein J. Nanotechnol. 2021, 12, 756–765, doi:10.3762/bjnano.12.59

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  • which can effectively conform to the outer contours of any target with autonomous deformation in a liquid environment for grasping and releasing. The robot has multiple actuation modes, for example, through trapping of magnetic microspheres or through encapsulating magnetic nanomaterials in the robot
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Published 20 Jul 2021

Local stiffness and work function variations of hexagonal boron nitride on Cu(111)

  • Abhishek Grewal,
  • Yuqi Wang,
  • Matthias Münks,
  • Klaus Kern and
  • Markus Ternes

Beilstein J. Nanotechnol. 2021, 12, 559–565, doi:10.3762/bjnano.12.46

Graphical Abstract
  • for atomic and molecular adsorbates owing to its local electronic trapping potential due to the in-plane electric field. We obtain work function (Φ) variations on the h-BN/Cu(111) superstructure of the order of 100 meV using two independent methods, namely the shift of field emission resonances and
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Published 17 Jun 2021

Influence of electrospray deposition on C60 molecular assemblies

  • Antoine Hinaut,
  • Sebastian Scherb,
  • Sara Freund,
  • Zhao Liu,
  • Thilo Glatzel and
  • Ernst Meyer

Beilstein J. Nanotechnol. 2021, 12, 552–558, doi:10.3762/bjnano.12.45

Graphical Abstract
  • surface. These defects, induced by the HV-ESD method itself, could allow for the trapping of C60 molecules and island nucleation far away from step edges. The separation distance between islands can also be small, as indicated by the white arrow and observed in several place in Figure 2b. Another
  • of the herringbone reconstruction, a favorable trapping site [38]. The height of the dots is too small to be C60 molecules and the dots are therefore attributed to solvent. Nevertheless, such defects can influence the nucleation and the size of C60 islands. The presence of the solvent on the surface
  • molecular trapping and their creation is therefore studied for those reasons [32][43][45][46]. In HV-ESD deposition, their presence can be reduced but not inhibited without annealing of the surface [44]. C60 on NiO(001) surface NiO is a wide-bandgap metal oxide with potential applications in organic
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Published 15 Jun 2021

Paper-based triboelectric nanogenerators and their applications: a review

  • Jing Han,
  • Nuo Xu,
  • Yuchen Liang,
  • Mei Ding,
  • Junyi Zhai,
  • Qijun Sun and
  • Zhong Lin Wang

Beilstein J. Nanotechnol. 2021, 12, 151–171, doi:10.3762/bjnano.12.12

Graphical Abstract
  • (i.e., electronegative). Furthermore, due to the high roughness and porous nanofiber structure it can lead to enhanced TENG output performances owing to improved charge-trapping abilities. Based on the above advantages and conveniences, paper-based TENGs (P-TENGs) have exhibited great potential for
  • individual electron clouds of the materials are separated by a distance d, the electrons cannot be transferred between material A and material B. The trapping effect of the potential wells prevents the electrons from escaping (Figure 3-i). Once the material A comes into contact with the material B, their
  • introduce electronegative or electropositive functional groups) and micro-/nanostructure engineering (to introduce charge-trapping points to facilitate charge transfer) are effective ways to modulate the electronegativity. The surface modification of the friction materials is performed to implement chemical
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Published 01 Feb 2021

Unravelling the interfacial interaction in mesoporous SiO2@nickel phyllosilicate/TiO2 core–shell nanostructures for photocatalytic activity

  • Bridget K. Mutuma,
  • Xiluva Mathebula,
  • Isaac Nongwe,
  • Bonakele P. Mtolo,
  • Boitumelo J. Matsoso,
  • Rudolph Erasmus,
  • Zikhona Tetana and
  • Neil J. Coville

Beilstein J. Nanotechnol. 2020, 11, 1834–1846, doi:10.3762/bjnano.11.165

Graphical Abstract
  • electron in the CB of TiO2 can be transferred to the CB of mSiO2@NiPS, whereby the latter acts as an electron trap (Figure 6b). The electron traps create more free holes that can form reactive hydroxyl radicals, which further degrade the MV dye [52]. The electron trapping process could also increase the
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Published 09 Dec 2020

Nanocasting synthesis of BiFeO3 nanoparticles with enhanced visible-light photocatalytic activity

  • Thomas Cadenbach,
  • Maria J. Benitez,
  • A. Lucia Morales,
  • Cesar Costa Vera,
  • Luis Lascano,
  • Francisco Quiroz,
  • Alexis Debut and
  • Karla Vizuete

Beilstein J. Nanotechnol. 2020, 11, 1822–1833, doi:10.3762/bjnano.11.164

Graphical Abstract
  • radical trapping experiments. Keywords: bismuth ferrite (BiFeO3); dye; nanocasting; nanoparticles; photocatalysis; rhodamine B; SBA-15; Introduction In the face of a continuously growing demand, the production of safe and readily available water is one of the biggest challenges humanity is facing
  • photocatalytic activity almost ceased entirely under basic conditions at pH 9 due to the repulsive interactions of the formed carboxylate anions of the dye molecule with the catalyst surface (see above). We then investigated the reaction mechanism by determining the active species. A series of trapping
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Published 07 Dec 2020

Absorption and photoconductivity spectra of amorphous multilayer structures

  • Oxana Iaseniuc and
  • Mihail Iovu

Beilstein J. Nanotechnol. 2020, 11, 1757–1763, doi:10.3762/bjnano.11.158

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  • mono- and bimolecular and that the transport is controlled through multiple trapping processes with exponential distribution of the localized states in the bandgap. Regarding the physics and applications of chalcogenide materials, multilayered amorphous thin-film structures are especially interesting
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Published 20 Nov 2020

Seebeck coefficient of silicon nanowire forests doped by thermal diffusion

  • Shaimaa Elyamny,
  • Elisabetta Dimaggio and
  • Giovanni Pennelli

Beilstein J. Nanotechnol. 2020, 11, 1707–1713, doi:10.3762/bjnano.11.153

Graphical Abstract
  • require an oxidation of the surface for the trapping of the doping species. However, the reduction of the thermal conductivity, which is the aim of the nanoscale structuring, relies on the roughness of the nanowire surfaces, and the smoothing produced by the oxide growth would heavily reduce this effect
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Published 11 Nov 2020

The influence of an interfacial hBN layer on the fluorescence of an organic molecule

  • Christine Brülke,
  • Oliver Bauer and
  • Moritz M. Sokolowski

Beilstein J. Nanotechnol. 2020, 11, 1663–1684, doi:10.3762/bjnano.11.149

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Published 03 Nov 2020

Electrokinetic characterization of synthetic protein nanoparticles

  • Daniel F. Quevedo,
  • Cody J. Lentz,
  • Adriana Coll de Peña,
  • Yazmin Hernandez,
  • Nahal Habibi,
  • Rikako Miki,
  • Joerg Lahann and
  • Blanca H. Lapizco-Encinas

Beilstein J. Nanotechnol. 2020, 11, 1556–1567, doi:10.3762/bjnano.11.138

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  • separation experiments. The unique particle-dependent parameter EEEC can predict the required particle trapping voltage in any insulator-based EK device. A modified version of the EEEC, called empirical EEEC (eEEEC) can be obtained with a less labor-intensive procedure by employing devices with insulating
  • studies [36][37][38] have demonstrated the potential of DEP for macromolecule manipulation. However, EK microscale techniques for protein manipulation are still being developed. The Ros group has reported both the trapping and streaming of protein particles with devices containing insulating posts on the
  • voltage at which SPNPs will become trapped in an insulator-based EK device. Moreover, homogeneous particles with a higher content of BSA showed lower trapping voltage values. The results also indicate that particle anisotropy plays an important role in determining the trapping voltage, as 50:50
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Published 13 Oct 2020

Wafer-level integration of self-aligned high aspect ratio silicon 3D structures using the MACE method with Au, Pd, Pt, Cu, and Ir

  • Mathias Franz,
  • Romy Junghans,
  • Paul Schmitt,
  • Adriana Szeghalmi and
  • Stefan E. Schulz

Beilstein J. Nanotechnol. 2020, 11, 1439–1449, doi:10.3762/bjnano.11.128

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  • random structures are typically vertically aligned nanowires, also called nanorods. Silicon nanowire arrays can be designed to have a low reflectance of about 1% in a broad spectral range, depending on their geometry. These silicon structures exhibit efficient light trapping because photons are scattered
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Published 23 Sep 2020

Thermophoretic tweezers for single nanoparticle manipulation

  • Jošt Stergar and
  • Natan Osterman

Beilstein J. Nanotechnol. 2020, 11, 1126–1133, doi:10.3762/bjnano.11.97

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  • Jost Stergar Natan Osterman Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, Ljubljana, Slovenia J. Stefan Institute, Jamova 39, Ljubljana, Slovenia 10.3762/bjnano.11.97 Abstract We present the trapping and manipulation of a single nano-object in an aqueous medium by
  • modeling gives a quantitative prediction of the effect. Traps can be dynamically created and relocated, which we demonstrate by the controlled independent manipulation of two nanoparticles. Keywords: laser; microfluidics; nano-manipulation; thermophoresis; trapping; tweezers; Introduction In science and
  • technology, there is an incessant need, or at least a desire, for a (contactless) manipulation of small objects, such as nanoparticles, molecules, or even single atoms. In this work we present an approach to the thermophoretic trapping of particles in dynamic temperature gradients induced through laser
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Published 30 Jul 2020

Highly sensitive detection of estradiol by a SERS sensor based on TiO2 covered with gold nanoparticles

  • Andrea Brognara,
  • Ili F. Mohamad Ali Nasri,
  • Beatrice R. Bricchi,
  • Andrea Li Bassi,
  • Caroline Gauchotte-Lindsay,
  • Matteo Ghidelli and
  • Nathalie Lidgi-Guigui

Beilstein J. Nanotechnol. 2020, 11, 1026–1035, doi:10.3762/bjnano.11.87

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  • use of composite systems of dielectrics (TiO2, ZnO) and metallic NPs has gathered increasing attention regarding SERS applications, because the plasmonic enhancement provided by metallic NPs can be combined with the optical properties of the semiconductor such as light trapping, scattering, and
  • abovementioned influence of the TiO2 surface on the size of the Au NPs (and consequently their plasmonic properties), a first hint can be found in the optical properties of semiconductor nanostructured materials. Their light-scattering, light-trapping and antireflection abilities, have already been reported to
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Published 14 Jul 2020

Integrated photonics multi-waveguide devices for optical trapping and Raman spectroscopy: design, fabrication and performance demonstration

  • Gyllion B. Loozen,
  • Arnica Karuna,
  • Mohammad M. R. Fanood,
  • Erik Schreuder and
  • Jacob Caro

Beilstein J. Nanotechnol. 2020, 11, 829–842, doi:10.3762/bjnano.11.68

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  • International B.V., P.O. Box 456, 7500 AL, Enschede, Netherlands 10.3762/bjnano.11.68 Abstract We realized integrated photonics multi-waveguide devices for optical trapping and Raman spectroscopy of particles in a fluid. In these devices, multiple beams directed towards the device center lead to a local field
  • enhancement around this center and thus counteract the effect of light concentration near the facets, which is a disadvantage of dual-waveguide traps. Thus, a trapping region is created around the center, where a single particle of a size in a wide range can be trapped and studied spectroscopically, free from
  • the influence of surfaces. We report the design (including simulations), fabrication and performance demonstration for multi-waveguide devices, using our Si3N4 waveguiding platform as the basis. The designed ridge waveguides, optimized for trapping and Raman spectroscopy, emit narrow beams. Multiple
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Published 27 May 2020
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