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Search for "nanocrystals" in Full Text gives 271 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

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

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  • nanomedicine has yielded several relevant advancements since its beginnings in the early 2000s. The dissolution kinetics of poorly soluble drugs have been improved by the production of drug nanocrystals, enabling continuous drug release. Lipid molecular structures have been manipulated at the nanoscale to
  • evaporation protocols allowed Generalova et al. [39] to prepare ethyl cellulose nanoparticles containing both hydrophobic and hydrophilic fluorescent nanocrystals. Size measurements showed that nanoparticles were in the range of 128–132 nm. Additionally, the corresponding fluorescence-labeled nanoparticles
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Published 13 Mar 2023

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

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  • X-ray spectrum analysis confirms the 1:1:1:1.5:1.5 stoichiometric ratio of, respectively, Ag, Zn, Ga, S, and Se. These two results indicate the formation of I-II-III-VI3-type alloyed crystals (AgZnGaS1.5Se1.5 nanocrystals). TEM image analysis reveals the QD nature of the synthesized Ag-Zn-Ga-S-Se
  • nanocrystals. The X-ray diffraction pattern confirms the hexagonal structure. Due to the near-infrared light absorption capability, the synthesized QDs were used as the sensitizer to fabricate QDSCs. The fabricated QDSCs were characterized by using electrochemical impedance spectroscopy and photovoltaic
  • [16]. Recently, Larsen et al. reported that, due to the appropriate bandgap (1.6–1.8 eV), AgGaSe2 is a wide-range light absorber in thin film solar cells [17]. Tianya Bai et al. [18] examined that ZnS-coated AgGaS2 nanocrystals (AgGaS2/ZnS core–shell nanocrystals) have a tunable bandgap and PL colors
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Published 14 Nov 2022

Bioselectivity of silk protein-based materials and their bio-inspired applications

  • Hendrik Bargel,
  • Vanessa T. Trossmann,
  • Christoph Sommer and
  • Thomas Scheibel

Beilstein J. Nanotechnol. 2022, 13, 902–921, doi:10.3762/bjnano.13.81

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  • blocks of (GAGAGS)n, which are responsible for the anisotropic β-sheet-rich nanocrystals [108]. Sericins are based on glue-like serine-rich glycoproteins with rubber-elastic properties [110]. In addition, a further small protein group named seroins was discovered in lepidopteran silk and is known to
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Published 08 Sep 2022

Recent advances in nanoarchitectures of monocrystalline coordination polymers through confined assembly

  • Lingling Xia,
  • Qinyue Wang and
  • Ming Hu

Beilstein J. Nanotechnol. 2022, 13, 763–777, doi:10.3762/bjnano.13.67

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  • increased by using these materials as positive electrodes. The networks can also help to accelerate ion transfer in coordination polymers. When the Prussian blue nanocrystals contain a double-network PAAm/PAMPS hydrogel, the uptake of Cs+ ions from solution could be as high as 397 mg·g−1, which is very
  • of single crystals around present networks. One important application is the assembly of vaccine particles. For instance, antigen (ovalbumin, OVA) and adjuvant (cytosinephosphate-guanine oligodeoxynucleotides, CpG) could be incorporated into ZIF-8 nanocrystals with the help of PEG networks [114]. The
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Published 12 Aug 2022

Zinc oxide nanostructures for fluorescence and Raman signal enhancement: a review

  • Ioana Marica,
  • Fran Nekvapil,
  • Maria Ștefan,
  • Cosmin Farcău and
  • Alexandra Falamaș

Beilstein J. Nanotechnol. 2022, 13, 472–490, doi:10.3762/bjnano.13.40

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  • combined with metal nanoparticles, resulting in enhanced photoactivity of Au-decorated ZnO nanocrystals for photoelectrochemical water splitting [9], improved photodetection performance of ZnO nanofibers decorated with Au NPs [10], or enhanced photocatalytic activity of ZnO doped with Au NPs [11]. Moreover
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Published 27 May 2022

Micro- and nanotechnology in biomedical engineering for cartilage tissue regeneration in osteoarthritis

  • Zahra Nabizadeh,
  • Mahmoud Nasrollahzadeh,
  • Hamed Daemi,
  • Mohamadreza Baghaban Eslaminejad,
  • Ali Akbar Shabani,
  • Mehdi Dadashpour,
  • Majid Mirmohammadkhani and
  • Davood Nasrabadi

Beilstein J. Nanotechnol. 2022, 13, 363–389, doi:10.3762/bjnano.13.31

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  • nature. They are constructed as NPs, nanofibers, nanocrystals, nanotubes, and nanofilms by high-tech methods of photolithography, electrospinning, nanoimprinting, and phase separation. Due to the hierarchical structure of articular cartilage ECM, there is considerable enthusiasm regarding the use of
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Published 11 Apr 2022

The effect of metal surface nanomorphology on the output performance of a TENG

  • Yiru Wang,
  • Xin Zhao,
  • Yang Liu and
  • Wenjun Zhou

Beilstein J. Nanotechnol. 2022, 13, 298–312, doi:10.3762/bjnano.13.25

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  • of this process. After 30 s of deposition under different conditions, different morphologies of nanocrystals, including pyramids, strips, and spheroids, were obtained (Figure 2). At the beginning of the experiment, Cu and PTFE are in contact through an external force. The surface charge on Cu is
  • ). After the size screening, the proportion of each particle size was calculated. The particle size distribution plays a vital role in improving the output performance. The nanocrystals can be divided into pyramids, spheroids and strips. The shape of the metal nanocrystals determines the distribution of
  • full contact with PTFE, but the small nanoparticles have no or not full contact with PTFE, which leads to the difference in output efficiency. The effect of surface topography on the output performance was studied by classifying the nanocrystals according to different shapes. The reason for the
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Published 15 Mar 2022

Engineered titania nanomaterials in advanced clinical applications

  • Padmavati Sahare,
  • Paulina Govea Alvarez,
  • Juan Manual Sanchez Yanez,
  • Gabriel Luna-Bárcenas,
  • Samik Chakraborty,
  • Sujay Paul and
  • Miriam Estevez

Beilstein J. Nanotechnol. 2022, 13, 201–218, doi:10.3762/bjnano.13.15

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  • (nanotubes, nanorods, nanowhiskers, nanoflower, nanotubes, nanobelts, or nanocrystals), and topographical features such as surface area, size (1–100 nm), and uncoordinated surface sites [26]. The photocatalytic nature of titania is greatly explored in antimicrobial studies as well as in photodynamic cancer
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Published 14 Feb 2022

A comprehensive review on electrospun nanohybrid membranes for wastewater treatment

  • Senuri Kumarage,
  • Imalka Munaweera and
  • Nilwala Kottegoda

Beilstein J. Nanotechnol. 2022, 13, 137–159, doi:10.3762/bjnano.13.10

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  • bioactive products. Patel et al. fabricated bioactive electrospun nanocomposite scaffolds of poly(lactic acid) for bone tissue engineering by incorporating cellulose nanocrystals and observed that the nanohybrid has excellent properties in terms of mechanical strength and thermal stability compared to the
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Published 31 Jan 2022

Self-assembly of amino acids toward functional biomaterials

  • Huan Ren,
  • Lifang Wu,
  • Lina Tan,
  • Yanni Bao,
  • Yuchen Ma,
  • Yong Jin and
  • Qianli Zou

Beilstein J. Nanotechnol. 2021, 12, 1140–1150, doi:10.3762/bjnano.12.85

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  • alcohol dehydrogenase may be incorporated into Cys microspheres, resulting in hybrid microspheres with photocatalytic and biocatalytic activities. In addition, Cys/Zn microspheres were modified with CO32−-doped ZnS nanocrystals by a hydrothermal treatment, and then glutamic acid dehydrogenase was
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Published 12 Oct 2021

Use of nanosystems to improve the anticancer effects of curcumin

  • Andrea M. Araya-Sibaja,
  • Norma J. Salazar-López,
  • Krissia Wilhelm Romero,
  • José R. Vega-Baudrit,
  • J. Abraham Domínguez-Avila,
  • Carlos A. Velázquez Contreras,
  • Ramón E. Robles-Zepeda,
  • Mirtha Navarro-Hoyos and
  • Gustavo A. González-Aguilar

Beilstein J. Nanotechnol. 2021, 12, 1047–1062, doi:10.3762/bjnano.12.78

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  • metabolism, low bioavailability, and fast elimination of the molecule. Considering this, the present work reviews the use of CUR-based nanosystems as anticancer agents, including conventional nanosystems (i.e., liposomes, nanoemulsions, nanocrystals, nanosuspensions, polymeric nanoparticles) and nanosystems
  • anticancer activity, including liposomes, nanoemulsions, nanocrystals, nanosuspensions, and polymeric nanoparticles, as well as dual effect nanosystems which respond to external stimuli (mainly magnetic nanoparticles and photodynamic therapy), in addition to internal ones. Furthermore, key design factors
  • CUR-containing nanosystems that have enhanced therapeutic efficacy are discused. Nanocrystals, nanococrystals, and nanosuspensions. Nanocrystals are crystalline materials that contain the drug or molecule of interest at the nanoscale, with a size that can range from 10–1000 nm [45]. They can be
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Published 15 Sep 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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  • nanocrystals [50], molybdenum trioxide [21], manganese dioxide [51], and vanadium carbide nanoparticles [12]. For instance, the electrocatalytic performance of cobalt nanoparticles (CoNPs) was reported by Zhang et al. [45] who studied a cathode comprising hollow carbon nanospheres. The cathode displayed a
  • based on nickel disulfide nanocrystals implanted in nitrogen-doped porous carbon nanotubes. It exhibits high reversible capacity of 650 mAh·g−1 after 200 cycles at 0.1 A·g−1 and excellent cycling stability for 3500 cycles. Additionally, Kumar et al. [51] described a cathode, based on manganese dioxide
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Published 09 Sep 2021

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

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  • University, 70200, Karaman, Turkey Department of Biotechnology, Faculty of Science, Selcuk University, 42130, Konya, Turkey 10.3762/bjnano.12.74 Abstract In this present work, CuNiCoS4 thiospinel nanocrystals were synthesized by hot injection and characterized by X-ray diffractometry (XRD), high-resolution
  • transmission electron microscopy (HR-TEM), and energy-dispersive X-ray spectroscopy (EDS). The XRD, EDS, and HR-TEM analyses confirmed the successful synthesis of CuNiCoS4. The obtained CuNiCoS4 thiospinel nanocrystals were tested for photodiode and capacitance applications as interfacial layer between Au and
  • voltage-and frequency-dependent. The fabricated device with CuNiCoS4 thiospinel nanocrystals can be employed in high-efficiency optoelectronic applications. Keywords: Au/CuNiCoS4/p-Si device; CuNiCoS4; optoelectronic applications; Schottky devices; Introduction Recently, spinel materials have attracted
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Published 02 Sep 2021

The role of deep eutectic solvents and carrageenan in synthesizing biocompatible anisotropic metal nanoparticles

  • Nabojit Das,
  • Akash Kumar and
  • Raja Gopal Rayavarapu

Beilstein J. Nanotechnol. 2021, 12, 924–938, doi:10.3762/bjnano.12.69

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  • preferential facet binding in the solution phase. The seed-mediated approach is a multistep controlled redox reaction utilizing metal seed nanocrystals of 1.5–4.0 nm. The seed particles are synthesized by reducing precursor gold salt using an excess amount of a strong reducing agent, such as sodium borohydride
  • nanocrystals with high-index {771} facets. The nanoparticles with high-index planes exhibited higher catalytic activity due to high density of atoms with low coordination number compared to nanoparticles with low-index facets such as {100}, {111}, or {110}. Chirea et al. synthesized polycrystalline gold
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Published 18 Aug 2021

Fate and transformation of silver nanoparticles in different biological conditions

  • Barbara Pem,
  • Marija Ćurlin,
  • Darija Domazet Jurašin,
  • Valerije Vrček,
  • Rinea Barbir,
  • Vedran Micek,
  • Raluca M. Fratila,
  • Jesus M. de la Fuente and
  • Ivana Vinković Vrček

Beilstein J. Nanotechnol. 2021, 12, 665–679, doi:10.3762/bjnano.12.53

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  • AgNPs enter the body where they gain a protein corona, aggregate, and dissolve to Ag+. Ionic silver may precipitate in the anion-rich environment of different tissues, where Ag binds to S, resulting in nanocrystals. Aggregation and corona–NP destabilisation can also lead to precipitation. Whole blood
  • ) PLL-AgNPs in PBS, (c) electron-beam-induced transformation of cubic nanocrystals formed after incubation of AgNPs in PBS, (d) AgNPs formed after Ag+ incubation in 1% (w/v) of liver homogenate, (e) AgNPs formed after Ag+ incubation in 1% (w/v) of brain homogenate, (f) HAADF images of AgNPs formed after
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Published 07 Jul 2021

A review of defect engineering, ion implantation, and nanofabrication using the helium ion microscope

  • Frances I. Allen

Beilstein J. Nanotechnol. 2021, 12, 633–664, doi:10.3762/bjnano.12.52

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  • ]. Here, neon line irradiation of an Si(25 nm)/SiO2(6.5 nm)/Si(bulk) stack was used to induce collisional mixing of silicon atoms into the buried SiO2 layer. Upon subsequent thermal annealing, 1D chains of silicon nanocrystals of 2.2 nm diameter self-assembled in the center of the SiO2 layer. A TEM-based
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Published 02 Jul 2021

A review on nanostructured silver as a basic ingredient in medicine: physicochemical parameters and characterization

  • Gabriel M. Misirli,
  • Kishore Sridharan and
  • Shirley M. P. Abrantes

Beilstein J. Nanotechnol. 2021, 12, 440–461, doi:10.3762/bjnano.12.36

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Published 14 May 2021

Nickel nanoparticle-decorated reduced graphene oxide/WO3 nanocomposite – a promising candidate for gas sensing

  • Ilka Simon,
  • Alexandr Savitsky,
  • Rolf Mülhaupt,
  • Vladimir Pankov and
  • Christoph Janiak

Beilstein J. Nanotechnol. 2021, 12, 343–353, doi:10.3762/bjnano.12.28

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  • grains of WO3 nanocrystals in different sizes (hundreds of nanometers to several micrometers). Smaller grains are uniformly distributed on the surface of larger grains (Figure 3). Gas sensing measurements on gas permeable pellets Ni@rGO was then mixed with WO3 xerogel and pressed into pellets to be
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Published 15 Apr 2021

Exploring the fabrication and transfer mechanism of metallic nanostructures on carbon nanomembranes via focused electron beam induced processing

  • Christian Preischl,
  • Linh Hoang Le,
  • Elif Bilgilisoy,
  • Armin Gölzhäuser and
  • Hubertus Marbach

Beilstein J. Nanotechnol. 2021, 12, 319–329, doi:10.3762/bjnano.12.26

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  • beam-induced surface activation (EBISA) are studied with the precursors Fe(CO)5 and Co(CO)3NO on SAMs of 1,1′,4′,1′′-terphenyl-4-thiol (TPT). For Co(CO)3NO only EBID leads to deposits consisting of cobalt oxide. In the case of Fe(CO)5 EBID and EBISA yield deposits consisting of iron nanocrystals with
  • irradiation (100 eV, 120 mC/cm2) the whole surface of the cross-linked SAM is afterwards covered with clean iron nanocrystals (Figure S6d,e in Supporting Information File 1). The insulating ultrathin CNM is covered with a thin layer of conductive ferromagnetic iron crystals. By this process laterally
  • this transfer process with EBID structures fabricated from Fe(CO)5 are depicted in Figure 4. The SE micrograph in Figure 4a depicts a several micrometers large marker structure fabricated via EBID + AG using Fe(CO)5. Through the AG process iron nanocrystals are formed (Figure 4b). After the transfer
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Published 07 Apr 2021

The role of gold atom concentration in the formation of Cu–Au nanoparticles from the gas phase

  • Yuri Ya. Gafner,
  • Svetlana L. Gafner,
  • Darya A. Ryzkova and
  • Andrey V. Nomoev

Beilstein J. Nanotechnol. 2021, 12, 72–81, doi:10.3762/bjnano.12.6

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  • recent years, a wide range of chemical methods have been successfully implemented for the synthesis of Cu–Au nanosystems of various percentages, the use of which led to the production of Cu–Au nanoparticles with spherical [4], pentagonal [5], rod-like [6][7], and cubic [8] shapes. Nanocrystals of a gold
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Published 19 Jan 2021

Effect of different silica coatings on the toxicity of upconversion nanoparticles on RAW 264.7 macrophage cells

  • Cynthia Kembuan,
  • Helena Oliveira and
  • Christina Graf

Beilstein J. Nanotechnol. 2021, 12, 35–48, doi:10.3762/bjnano.12.3

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  • flow cytometry through the measurement of side-scattered light, which is proportional to changes in cell granularity or to the internal complexity. Results and Discussion Preparation and characterization of upconversion nanoparticles Oleate-functionalized NaYF4:Yb,Er nanocrystals were prepared by a
  • + is released from NaYF4:Yb,Er nanocrystals [19]. Dong et al. reported an analogous observation for the ratio of Y3+ and Gd3+ during a partial disintegration of NaGdF4:Y3+,Tb3+ [61]. This finding can be explained assuming that Y3+ ions are concentrated at the nanoparticle surface and, consequently, are
  • dissolution processes) in the cellular environment as these processes reduce the viability of the investigated cells due to ion release. Coating NaYF4:Yb,Er nanocrystals with silica shells with two different thickness values is an efficient way to reduce the release of toxic ions from these particles and
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Published 08 Jan 2021

Bio-imaging with the helium-ion microscope: A review

  • Matthias Schmidt,
  • James M. Byrne and
  • Ilari J. Maasilta

Beilstein J. Nanotechnol. 2021, 12, 1–23, doi:10.3762/bjnano.12.1

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  • instruments lack the spatial resolving power of the HIM [44]. An interesting and well-characterised geomicrobiological test system for HIM-SIMS spectrometers would be magnetosomes synthesised by magnetotactic bacteria, which are Fe3O4 nanocrystals of about 50 nm length [45]. HIM-SIMS also appears to be a
  • the development of mammalian tooth enamel [67][71]. Tooth enamel consists of hydroxyapatite crystals, which form needle-shaped nanocrystals of several micrometres length with a diameter below 100 nm. HIM revealed insight into the complex interactions between the enamel-forming cells, matrix proteins
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Published 04 Jan 2021

Scanning transmission imaging in the helium ion microscope using a microchannel plate with a delay line detector

  • Eduardo Serralta,
  • Nico Klingner,
  • Olivier De Castro,
  • Michael Mousley,
  • Santhana Eswara,
  • Serge Duarte Pinto,
  • Tom Wirtz and
  • Gregor Hlawacek

Beilstein J. Nanotechnol. 2020, 11, 1854–1864, doi:10.3762/bjnano.11.167

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  • also detect channeling-related contrast on polycrystalline silicon, thallium chloride nanocrystals, and single-crystalline silicon by comparing the signal transmitted at different directions for the same data set. Keywords: bright-field; channeling; dark-field; delay line detector; helium ion
  • see channeling-related contrast in DF. Employing DF and post-processing, we see a contrast dependence on the orientation of thallium chloride nanocrystals. Finally, beam steering effects were shown to occur for a single-crystalline silicon sample. (a) Schematic representation of the STIM experiment
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Published 11 Dec 2020

Imaging and milling resolution of light ion beams from helium ion microscopy and FIBs driven by liquid metal alloy ion sources

  • Nico Klingner,
  • Gregor Hlawacek,
  • Paul Mazarov,
  • Wolfgang Pilz,
  • Fabian Meyer and
  • Lothar Bischoff

Beilstein J. Nanotechnol. 2020, 11, 1742–1749, doi:10.3762/bjnano.11.156

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  • ], the fabrication of graphene nanomeshes [8], the formation of single Si nanocrystals embedded in SiO2 for single-electron transistors [9], the spatially resolved engineering of the thermal conductivity in individual Si nanowires [10], as well as the creation of nano-Josephson superconducting tunnel
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Published 18 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
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