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Search for "field emission" in Full Text gives 288 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

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

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  • materials in phase 2. A simulated annealing fitting algorithm was employed. The PAAO structure (Figure 1a) was confirmed using field-emission scanning electron microscopy (FE-SEM-4800, Hitachi, Tokyo, Japan). The relationship between thickness measurements using SEM and optical interferometry has been
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Published 31 Jan 2024

Assessing phytotoxicity and tolerance levels of ZnO nanoparticles on Raphanus sativus: implications for widespread adoptions

  • Pathirannahalage Sahan Samuditha,
  • Nadeesh Madusanka Adassooriya and
  • Nazeera Salim

Beilstein J. Nanotechnol. 2024, 15, 115–125, doi:10.3762/bjnano.15.11

Graphical Abstract
  • kcps, a duration of 50 s. Water was used as a dispersant with a NP concentration of 25 ppm following sonication for 30 min at 45 kHz using a GT SONIC-L3 sonicator. Particle size and shape of ZnO NPs were analyzed using Hitachi SU6600 FE (Field Emission)-SEM at the Sri Lankan Institute of Nanotechnology
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Published 23 Jan 2024

New application of bimetallic Ag/Pt nanoplates in a colorimetric biosensor for specific detection of E. coli in water

  • Azam Bagheri Pebdeni,
  • Mohammad N. AL-Baiati and
  • Morteza Hosseini

Beilstein J. Nanotechnol. 2024, 15, 95–103, doi:10.3762/bjnano.15.9

Graphical Abstract
  • E. coli was successfully detected using the developed colorimetric sensor. The sensor offers a straightforward, sensitive, and dependable method for detecting pathogens and ensuring water safety. Results and Discussion Characterization of Ag/Pt NPL and apt-NPL Field-emission scanning electron
  • lambda 25 UV–vis spectrometer was employed for UV–vis absorption measurement in the range of 200–800 nm. The morphology and shape of NPLs were studied using a field-emission scanning electron microscope (Supra 400VP, Zeiss, Oberkochen, Germany). Dynamic light scattering experiments were carried out at
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Published 17 Jan 2024

Study of the reusability and stability of nylon nanofibres as an antibody immobilisation surface

  • Inés Peraile,
  • Matilde Gil-García,
  • Laura González-López,
  • Nushin A. Dabbagh-Escalante,
  • Juan C. Cabria-Ramos and
  • Paloma Lorenzo-Lozano

Beilstein J. Nanotechnol. 2024, 15, 83–94, doi:10.3762/bjnano.15.8

Graphical Abstract
  • immunocapture system in NF and 96-well microplate, for each time: ***p < 0.001. Field-emission scanning electron microscopy image of NFs. Acknowledgements We would like to thank the whole team at Nieves Murillo of TECNALIA – Industry and Transport Division for providing the nylon NFs. Funding These results
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Published 15 Jan 2024

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

Graphical Abstract
  • nanoparticles is presented separately in the subsequent sections to verify the catalog information provided by the manufacturer. In the characterization of the nanoparticles used in the study, field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction
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Published 02 Nov 2023

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

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  • composition of the materials. The morphology of pure CuO NPs and CuO NPs/ZnO NRs was examined by field-emission scanning electron microscopy. UV–vis absorption spectroscopy showed the optical properties of the materials. The photodetector performance was studied through the current–voltage (I–V
  • and paves the way for developing more stable and effective visible-light photodetectors with remarkable photoresponse and shorter rise and decay times. Results and Discussion The morphologies of pure ZnO NRs and CuO NPs/ZnO NRs were examined via scanning electron microscopy (Figure 1). The field
  • -emission scanning electron microscopy (FESEM) image of ZnO NRs exhibits nanorods with hexagonal cross section, well aligned with the glass substrate (Figure 1a). Figure 1b indicates that many spherical nanoparticles are formed on the ZnO NRs after spraying the CuO NP solution with a concentration of 0.05 M
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Published 13 Oct 2023

N-Heterocyclic carbene-based gold etchants

  • Robert B. Chevalier,
  • Justin Pantano,
  • Matthew K. Kiesewetter and
  • Jason R. Dwyer

Beilstein J. Nanotechnol. 2023, 14, 865–871, doi:10.3762/bjnano.14.71

Graphical Abstract
  • % nitrogen gas. Electron micrographs were recorded using the SE2 detector of a Zeiss SIGMA VP field emission scanning electron microscope (SEM). Energy dispersive X-ray spectroscopy (EDS) spectra were obtained for each sample using an Oxford Instruments X-max 50 mm2 EDS attachment. Peaks were identified
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Published 21 Aug 2023

Silver-based SERS substrates fabricated using a 3D printed microfluidic device

  • Phommachith Sonexai,
  • Minh Van Nguyen,
  • Bui The Huy and
  • Yong-Ill Lee

Beilstein J. Nanotechnol. 2023, 14, 793–803, doi:10.3762/bjnano.14.65

Graphical Abstract
  • (USA). Deionized water with a resistivity of 18 MΩ·cm−1, provided by a Milli-Q water purification system (Millipore Corp., MA, USA), was used throughout all the experiments. The morphologies of Ag NPs and SERS substrates were examined using a field-emission scanning electron microscope (FE-SEM, Mira II
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Published 21 Jul 2023

In situ magnesiothermic reduction synthesis of a Ge@C composite for high-performance lithium-ion batterie anodes

  • Ha Tran Huu,
  • Ngoc Phi Nguyen,
  • Vuong Hoang Ngo,
  • Huy Hoang Luc,
  • Minh Kha Le,
  • Minh Thu Nguyen,
  • My Loan Phung Le,
  • Hye Rim Kim,
  • In Young Kim,
  • Sung Jin Kim,
  • Van Man Tran and
  • Vien Vo

Beilstein J. Nanotechnol. 2023, 14, 751–761, doi:10.3762/bjnano.14.62

Graphical Abstract
  • carried out for structural and phase information. Infrared (IR, Shimadzu IRAffinity-1S) and Raman (LabRAM HR evolution confocal Raman microscope) spectra were measured for bond analysis. Field-emission scanning electron microscopy (FE-SEM, Hitachi S-4800) and high-resolution transmission electron
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Published 26 Jun 2023

Control of morphology and crystallinity of CNTs in flame synthesis with one-dimensional reaction zone

  • Muhammad Hilmi Ibrahim,
  • Norikhwan Hamzah,
  • Mohd Zamri Mohd Yusop,
  • Ni Luh Wulan Septiani and
  • Mohd Fairus Mohd Yasin

Beilstein J. Nanotechnol. 2023, 14, 741–750, doi:10.3762/bjnano.14.61

Graphical Abstract
  • by field-emission scanning electron microscopy (FESEM, Zeiss Crossbeam 340) coupled with energy-dispersive X-ray analysis (EDX) for morphology and elemental analysis. Raman spectroscopy (HORIBA XploRA PLUS, 532 nm) was done to analyze the signature spectra of the grown CNTs. Line-of-sight images of
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Published 21 Jun 2023

The microstrain-accompanied structural phase transition from h-MoO3 to α-MoO3 investigated by in situ X-ray diffraction

  • Zeqian Zhang,
  • Honglong Shi,
  • Boxiang Zhuang,
  • Minting Luo and
  • Zhenfei Hu

Beilstein J. Nanotechnol. 2023, 14, 692–700, doi:10.3762/bjnano.14.55

Graphical Abstract
  • calcinated samples were characterized using a field-emission scanning microscope (Hitachi S-4800) equipped with an energy-dispersive X-ray detector working at 10 kV and 10 μA. (a) 3D plot of the in situ X-ray diffraction patterns, where bottom and top display the two patterns collected at 30 and 450 °C
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Published 07 Jun 2023

Nanoarchitectonics to entrap living cells in silica-based systems: encapsulations with yolk–shell and sepiolite nanomaterials

  • Celia Martín-Morales,
  • Jorge Fernández-Méndez,
  • Pilar Aranda and
  • Eduardo Ruiz-Hitzky

Beilstein J. Nanotechnol. 2023, 14, 522–534, doi:10.3762/bjnano.14.43

Graphical Abstract
  • without staining. Electron microscopy imaging was conducted using a field-emission scanning electron microscope FEI-NOVA NanoSEM 230 equipped with an Apollo XL silicon drift detector from EDAX-Ametek or using a high-resolution JEOL IT500HR/LA microscope equipped with an energy dispersive X-ray
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Published 25 Apr 2023

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

Graphical Abstract
  • efficiency was attributed to a good impedance matching with free space [17]. In [24], a Bi2Sr2CaCu2O8+δ mesa was implemented into a patch antenna and far-field emission at f = 1.5 THz was reported. Common for all mentioned approaches is that the junctions, which are small compared to λ0 and, according to
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Published 26 Jan 2023

Gap-directed chemical lift-off lithographic nanoarchitectonics for arbitrary sub-micrometer patterning

  • Chang-Ming Wang,
  • Hong-Sheng Chan,
  • Chia-Li Liao,
  • Che-Wei Chang and
  • Wei-Ssu Liao

Beilstein J. Nanotechnol. 2023, 14, 34–44, doi:10.3762/bjnano.14.4

Graphical Abstract
  • Schottky Field Emission Scanning Electron Microscope, Tokyo, Japan) is used, but for sub-100 nm features AFM is employed to avoid the heavy influence of high-energy electron beams on molecular patterns in imaging. The straightness of the obtained lines is also assessed by calculating the linear regression
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Published 04 Jan 2023

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

Graphical Abstract
  • of materials The morphology, the phase, and the vibrational characteristics of the surface functional groups of the materials were observed by field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR). Diffuse reflectance
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Published 16 Dec 2022

Non-stoichiometric magnetite as catalyst for the photocatalytic degradation of phenol and 2,6-dibromo-4-methylphenol – a new approach in water treatment

  • Joanna Kisała,
  • Anna Tomaszewska and
  • Przemysław Kolek

Beilstein J. Nanotechnol. 2022, 13, 1531–1540, doi:10.3762/bjnano.13.126

Graphical Abstract
  • value was then obtained from the point at which the curve showing final pH vs initial pH intersected the y = x line on the graph. The morphology of the catalysts was observed with a field-emission scanning electron microscope (Zeiss Ultra 55, Oberkochen, Germany). The crystalline phases were analyzed
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Published 15 Dec 2022

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

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  • -603103, Tamil Nadu, India 10.3762/bjnano.13.125 Abstract A TiO2@MWCNTs (multi-wall carbon nanotubes) nanocomposite photoanode is prepared for photoelectrochemical water splitting in this study. The physical and photoelectrochemical properties of the photoanode are characterized using field emission
  • nanocomposite characterizations The surface morphology of MWCNTs and the TiO2@MWCNTs nanocomposite is characterized by using field-emission scanning electron microscopy (FE-SEM, S4800) and transmission electron microscopy (TEM, JEOL-1400). The crystallization behavior of the catalysts is analyzed by X-ray
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Published 14 Dec 2022

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

Graphical Abstract
  • ° in 2θ. Quantitative chemical analysis was performed on a JEOL JSM-7401F field-emission scanning electron microscope (FE-SEM) using EDX. An acceleration voltage of 15 kV and a working distance of 8 mm were used. The samples were precoated with Au/Pd for 10 seconds. Ultraviolet–visible spectroscopy was
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Published 13 Dec 2022

Rapid and sensitive detection of box turtles using an electrochemical DNA biosensor based on a gold/graphene nanocomposite

  • Abu Hashem,
  • M. A. Motalib Hossain,
  • Ab Rahman Marlinda,
  • Mohammad Al Mamun,
  • Khanom Simarani and
  • Mohd Rafie Johan

Beilstein J. Nanotechnol. 2022, 13, 1458–1472, doi:10.3762/bjnano.13.120

Graphical Abstract
  • probe using bioinformatics tools, and it was also validated in wet-lab experiments. As a detection platform, a screen-printed carbon electrode (SPCE) enhanced with a nanocomposite containing gold nanoparticles and graphene was used. The morphology of the nanoparticles was analysed by field-emission
  • modified screen-printed carbon electrode Surface morphology and structural characterisation Field-emission scanning electron microscopy (FESEM) images of nanoparticles and their composites are depicted in Figure 2a–b, where the wrinkled regions represent specific patterns of different materials. In Figure
  • Gr/SPCE surface, which was then labelled as AuNPs/Gr/SPCE. Morphological and structural studies of nanomaterials The surface morphology of the nanoparticles and their nanocomposites were analysed using a field-emission scanning electron microscope (model SU8030 Hitachi, Japan), equipped with an
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Published 06 Dec 2022

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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  • intermediates from the synthesis process into photocatalysts to alter the energy band structure and increase photocatalytic activity [89]. A simple two-step technique was used to develop a novel compound photocatalyst of Bi/BiOBr-Bi5+ [90]. X-ray diffraction, field-emission transmission electron microscopy, and
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Published 11 Nov 2022

Studies of probe tip materials by atomic force microscopy: a review

  • Ke Xu and
  • Yuzhe Liu

Beilstein J. Nanotechnol. 2022, 13, 1256–1267, doi:10.3762/bjnano.13.104

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  • et al. [34] developed a technique based on field emission-induced growth by growing a single metal nanowire at the AFM tip and forming vertically aligned nanowire probes on AFM cantilever beams of different types and force constants. This type of probe has properties such as a high aspect ratio and
  • robustness. This technique based on field emission-induced growth has been maturely applied to produce tungsten nanowire probes. The produced probes have high reproducibility and consistency. Experiments using tungsten nanowire probes have shown that the resulting AFM images are of high resolution because of
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Published 03 Nov 2022

Green synthesis of zinc oxide nanoparticles toward highly efficient photocatalysis and antibacterial application

  • Vo Thi Thu Nhu,
  • Nguyen Duy Dat,
  • Le-Minh Tam and
  • Nguyen Hoang Phuong

Beilstein J. Nanotechnol. 2022, 13, 1108–1119, doi:10.3762/bjnano.13.94

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  • , Vietnam 10.3762/bjnano.13.94 Abstract Zinc oxide nanoparticles (ZnO NPs) were successfully synthesized by a green method using rosin and zinc chloride as salt precursors. The phase structure, morphology, and particle size of ZnO were determined by X-ray powder diffraction, field emission scanning
  • (XRD) using a Bruker D8 advanced X-ray diffractometer equipped with Cu Kα radiation (λ = 1.5418 Å). The morphology and size of the synthesized material were determined by field emission scanning electron microscopy (FESEM) on a Hitachi S-4800 at 15 kV and high-resolution transmission electron
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Published 07 Oct 2022

Solar-light-driven LaFexNi1−xO3 perovskite oxides for photocatalytic Fenton-like reaction to degrade organic pollutants

  • Chao-Wei Huang,
  • Shu-Yu Hsu,
  • Jun-Han Lin,
  • Yun Jhou,
  • Wei-Yu Chen,
  • Kun-Yi Andrew Lin,
  • Yu-Tang Lin and
  • Van-Huy Nguyen

Beilstein J. Nanotechnol. 2022, 13, 882–895, doi:10.3762/bjnano.13.79

Graphical Abstract
  • other hand, the prepared samples might also be considered non-porous materials with inter-particle pore voids, since their low surface area might come from the external surface, indicating that LaFe0.7Ni0.3O3 had the highest external surface area for reaction. Figure 7 revealed the field emission
  • diffracting angle was set from 10° to 70° with a scan rate of 4 °/min. The crystalline sizes of the LaFexNi1−xO3 perovskite oxides were further obtained by Scherrer’s equation. To obtain the morphologies of the prepared samples, S-4800 (Hitachi, Japan) was employed to conduct field emission scanning electron
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Published 05 Sep 2022

Hierarchical Bi2WO6/TiO2-nanotube composites derived from natural cellulose for visible-light photocatalytic treatment of pollutants

  • Zehao Lin,
  • Zhan Yang and
  • Jianguo Huang

Beilstein J. Nanotechnol. 2022, 13, 745–762, doi:10.3762/bjnano.13.66

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  • homogeneous suspension. The suspension was then dropped onto an Al foil to be observed via field-emission scanning electron microscopy (FE-SEM), and onto a carbon-supported copper grid for examination via transmission electron microscopy (TEM) and high resolution transmission electron microscopy (HR-TEM
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Published 04 Aug 2022

A nonenzymatic reduced graphene oxide-based nanosensor for parathion

  • Sarani Sen,
  • Anurag Roy,
  • Ambarish Sanyal and
  • Parukuttyamma Sujatha Devi

Beilstein J. Nanotechnol. 2022, 13, 730–744, doi:10.3762/bjnano.13.65

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  • an acceleration voltage of 15 kV. The morphological characteristics of the electrodeposited ERGO were obtained by field-emission scanning electron microscopy (FESEM, model: LEO 430i, Carl Zeiss) and high-resolution transmission electron microscopy (model: Tecnai G2 30ST, FEI) operating at 300 kV
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Published 28 Jul 2022
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