TEM sample preparation of lithographically patterned permalloy nanostructures on silicon nitride membranes

• Joshua Williams,
• Michael I. Faley,
• Joseph Vimal Vas,
• Peng-Han Lu and
• Rafal E. Dunin-Borkowski

Beilstein J. Nanotechnol. 2024, 15, 1–12, doi:10.3762/bjnano.15.1

• Abstract We have prepared ferromagnetic nanostructures intended for the investigation of high-frequency magnetization dynamics in permalloy (Py) nanodisks using Lorentz transmission electron microscopy (LTEM) and electron holography. Py nanodisks were fabricated on thin silicon nitride (SiN) membranes

• in Py nanodisks [1][2] with independent polarity and helicity [3]. Since then, many studies have been done on manipulating magnetic vortices inside Py nanodisks using micromagnetic simulations [4][5][6] and a variety of magnetic measurement techniques including magnetic force microscopy [7

• ], transmission electron microscopy (TEM) [1][8][9][10][11], scanning transmission X-ray microscopy [12][13], and magneto-optical Kerr effect microscopy [14][15]. Possible applications of Py nanodisks were proposed for zero-hysteresis magnet sensors, magnetic logic devices, and data storage [16]. Py is a nickel

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

• ]. One-step synthesis methods have been proposed for the fabrication of ZnO–metal nanocomposites as well, such as a fast one-step microwave assisted hydrothermal route [50]. Hollow doughnut-like ZnO–Au nanostructures were obtained, as well as other structures, including ZnO nanorods–Au NPs, ZnO nanodisks

Materials nanoarchitectonics at two-dimensional liquid interfaces

• Katsuhiko Ariga,
• Michio Matsumoto,
• Taizo Mori and
• Lok Kumar Shrestha

Beilstein J. Nanotechnol. 2019, 10, 1559–1587, doi:10.3762/bjnano.10.153

• hydrogen-bond donors. The two-dimensional quick dewetting process on a Langmuir–Schaefer-type surface can induce a good dispersion of nanodisks. Although the heights of nanodisks reported so far are within a narrow range between 2.6 and 2.9 nm, their diameters can widely range from 46 to 73 nm depending on

• their lateral surface pressure at the air–water interface. The fabricated array structures of nanodisks can be also transferred to metal surfaces such as platinum surfaces. The examples demonstrated that the combination of rather ambiguous molecular interactions and transfer processes can create precise

Site-specific growth of oriented ZnO nanocrystal arrays

• Rekha Bai,
• Dinesh K. Pandya,
• Sujeet Chaudhary,
• Veer Dhaka,
• Vladislav Khayrudinov,
• Jori Lemettinen,
• Christoffer Kauppinen and
• Harri Lipsanen

Beilstein J. Nanotechnol. 2019, 10, 274–280, doi:10.3762/bjnano.10.26

• morphological structures such as nanorods [5][6][7], nanowires [8], tetrapods [9], nanodisks [10], nanotubes [11], flowers [12], and nanocrystals [13], have been reported. Among the many nanostructured morphologies possible for ZnO, self-assembled ZnO nanocrystals (NCs) have been attracting great attention due

Metal–dielectric hybrid nanoantennas for efficient frequency conversion at the anapole mode

• Valerio F. Gili,
• Lavinia Ghirardini,
• Davide Rocco,
• Giuseppe Marino,
• Ivan Favero,
• Iännis Roland,
• Giovanni Pellegrini,
• Lamberto Duò,
• Marco Finazzi,
• Luca Carletti,
• Andrea Locatelli,
• Aristide Lemaître,
• Dragomir Neshev,
• Costantino De Angelis,
• Giuseppe Leo and
• Michele Celebrano

Beilstein J. Nanotechnol. 2018, 9, 2306–2314, doi:10.3762/bjnano.9.215

• sizeable efficiency enhancement. First reported in individual silicon-on-insulator nanodisks [17] and soon after in a coupled nanodisk trimer configuration [18], the THG enhancement attained was up to 100 times higher than in a Si slab of the same thickness thanks to the exploitation of Mie-type resonances

• . Even higher THG efficiency enhancement has been recently achieved in germanium nanodisks thanks to the excitation of the so-called anapole mode (from the ancient Greek “without any pole”) [19]. As the name suggests, the anapole mode consists in the superposition of a toroidal dipole (TD) and an

• of semiconducting materials has been pushed even further with the realization of nanoscale platforms featuring efficient second-order nonlinear processes. Recently, a nanoscale system based on AlGaAs nanodisks pumped in the telecom range (λ ≈ 1554 nm), at coincidence with the magnetic dipolar

Interaction-tailored organization of large-area colloidal assemblies

• Silvia Rizzato,
• Elisabetta Primiceri,
• Anna Grazia Monteduro,
• Adriano Colombelli,
• Angelo Leo,
• Maria Grazia Manera,
• Roberto Rella and
• Giuseppe Maruccio

Beilstein J. Nanotechnol. 2018, 9, 1582–1593, doi:10.3762/bjnano.9.150

• control the number of particles on the surface and the interparticle distance, namely changing the salt concentration and absorption time in the particle solution. These approaches enabled the realization of large area (≈cm2) patterning of nanoscale holes (nanoholes) and nanoscale disks (nanodisks) of

• of nanoscale patterns such as nanoscale holes (nanoholes), nanoscale disks (nanodisks), nanoscale dots (nanodots) and nanoscale rings (nanorings), combining the advantages of both top-down and bottom-up approaches [16][17][18]. In this technique, monodisperse, spherical, nanoscale materials (usually

• colloidal particles, providing the proper flexibility to realize different kinds of nanostructures such as nanodisks or nanohole arrays for several applications [20][21][23]. To obtain particles that are regularly distributed on the substrate with a well-defined, tunable distance and size, a good knowledge

Excitation of nonradiating magnetic anapole states with azimuthally polarized vector beams

• Aristeidis G. Lamprianidis and
• Andrey E. Miroshnichenko

Beilstein J. Nanotechnol. 2018, 9, 1478–1490, doi:10.3762/bjnano.9.139

• illuminated by such beams. We propose several configuration schemes where magnetic anapole modes of simple or hybrid nature can be detected in silicon nanospheres, nanodisks and nanopillars. Keywords: anapole excitation; dielectric nano-optics; multipolar expansion; T-matrix method; vector beams

• -field. Despite the purely fundamental aspect of them, nonradiating sources have attracted a great deal of attention in various nanoscale structures. Recently, it was suggested that silicon nanodisks can support a nonradiating excitation known as anapole [7], literary meaning “without poles”, in which

• discussed realistic setups, based on silicon nanodisks and nanopillars, which can be used for the experimental detection of magnetic anapole states. We also explained, under the T-matrix formalism, the physical mechanism of their excitation in the hosting nanoparticles, by means of a singular value

Fabrication of CeO₂–MO_x (M = Cu, Co, Ni) composite yolk–shell nanospheres with enhanced catalytic properties for CO oxidation

• Ling Liu,
• Jingjing Shi,
• Hongxia Cao,
• Ruiyu Wang and
• Ziwu Liu

Beilstein J. Nanotechnol. 2017, 8, 2425–2437, doi:10.3762/bjnano.8.241

• obtained material showed a high catalytic activity for CO oxidation [16][22]. In addition, porous/hollow CeO2-based composite oxides with high surface area can be prepared through heat treatment of suitable cerium-containing precursors. Typically, uniform porous Ce1−xZnxO2−δ solid-solution nanodisks were

Ta₂N₃ nanocrystals grown in Al₂O₃ thin layers

• Krešimir Salamon,
• Maja Buljan,
• Iva Šarić,
• Mladen Petravić and
• Sigrid Bernstorff

Beilstein J. Nanotechnol. 2017, 8, 2162–2170, doi:10.3762/bjnano.8.215

• even outperform gold as local heat sources if they are made as nanodisks [3]. Therefore, one of the crucial points in the field of nanoplasmonics is to gain control over the growth and final morphology of NPs. In this work, we aim to demonstrate a relatively simple preparation process for obtaining

A top-down approach for fabricating three-dimensional closed hollow nanostructures with permeable thin metal walls

• Carlos Angulo Barrios and
• Víctor Canalejas-Tejero

Beilstein J. Nanotechnol. 2017, 8, 1231–1237, doi:10.3762/bjnano.8.124

• based on resonant nanostructured surfaces depends on a variety of parameters such as materials, geometry and resonance wavelength, it is useful, for the sake of comparison, to mention sensitivity values exhibited by other similar devices found in the literature. For example, LSPR Au nanodisks on glass

• supports have been reported to show 136 nm/RIU for λLSPR ≈ 712 nm in air (top cladding) [12] and 196 nm/RIU for λLSPR ≈ 620 nm in air (top cladding) [13]. Improved configurations such as suspended nanodisks [12] and metal–insulator–metal systems [14] have exhibited bulk sensitivities of 222 nm/RIU for

Manipulation of magnetic vortex parameters in disk-on-disk nanostructures with various geometry

• Maxim E. Stebliy,
• Alexander G. Kolesnikov,
• Alexey V. Ognev,
• Alexander S. Samardak and
• Ludmila A. Chebotkevich

Beilstein J. Nanotechnol. 2015, 6, 697–703, doi:10.3762/bjnano.6.70

• implementation of the vortex-based devices such as memory cells [10] and ternary logic elements [11]. Experimental The experimental study was conducted for disk-on-disk nanostructures consisting of two permalloy (Py or Ni80Fe20) nanodisks with a thickness of 35 nm. The big (bottom) and small (upper) disks with

Growth evolution and phase transition from chalcocite to digenite in nanocrystalline copper sulfide: Morphological, optical and electrical properties

• Priscilla Vasthi Quintana-Ramirez,
• Ma. Concepción Arenas-Arrocena,
• José Santos-Cruz,
• Marina Vega-González,
• Omar Martínez-Alvarez,
• Víctor Manuel Castaño-Meneses,
• Laura Susana Acosta-Torres and
• Javier de la Fuente-Hernández

Beilstein J. Nanotechnol. 2014, 5, 1542–1552, doi:10.3762/bjnano.5.166

• in an organic solvent and amorphous CuxS was obtained in aqueous solution. Nanoparticle-like nucleation centers are formed at lower temperatures (220 °C), mixtures of morphologies (nanorods, nanodisks and nanoprisms) are seen at 230 and 240 °C, in which the nanodisks are predominant, while big

• structure. All CuxS products could be promising for optoelectronic applications. Keywords: abundant materials in the crust of Earth; electrical resistance; nanocrystals; nanodisks; non-toxic semiconductors; optical band gap; phase transition; photocurrent; Introduction Metallic chalcogenides based on

• obtained at 220 °C (Figure 2a). At 230 °C short chains of stacked nanorods with lengths (l) and width (w) of about 13.97 ± 2.7 × 5.86 ± 1.09 nm (from 260 particles), are seen in Figure 2b. Some hexagonal nanodisks of about 20–40 nm and prisms of about 50 nm are also observed. At 240 °C (Figure 2c) aligned

Enhanced photocatalytic activity of Ag–ZnO hybrid plasmonic nanostructures prepared by a facile wet chemical method

• Sini Kuriakose,
• Vandana Choudhary,
• Biswarup Satpati and
• Satyabrata Mohapatra

Beilstein J. Nanotechnol. 2014, 5, 639–650, doi:10.3762/bjnano.5.75

• holes. Increase in Ag nanoparticle loading onto ZnO nanostructures leads to an efficient suppression of recombination of photogenerated electrons and holes, which, in turn, improves the photocatalytic efficiency. Mechanism of citrate assisted growth of nanodisks The formation of ZnO nanoparticles from

• and prevent the accumulation of growth units on the (0001) surface. Because of this the growth of ZnO crystallites occurs along the six symmetric directions, producing ZnO nanodisks [38]. Thus the morphology of ZnO nanostructures can be easily altered by using trisodium citrate [39]. Detailed studies

• Ag–ZnO hybrid plasmonic nanostructures is mainly due to citrate-assisted formation of nanodisks with better photocatalytic efficiency and improved sun-light utilization due to the plasmonic response of Ag nanoparticles, which suppress the recombination of photodegenerated electrons and holes

Self-assembled monolayers and titanium dioxide: From surface patterning to potential applications

• Yaron Paz

Beilstein J. Nanotechnol. 2011, 2, 845–861, doi:10.3762/bjnano.2.94

• used to cover a silica surface, thus forming a close-packed structure with a hexagonal pattern of nanometer-sized contact dots (Figure 6). Then, OTS SAMs were deposited everywhere except for on the contact dots, facilitating the ALD growth of nanodisks of TiO2 from a titanium tetraisopropoxide

Review and outlook: from single nanoparticles to self-assembled monolayers and granular GMR sensors

• Alexander Weddemann,
• Inga Ennen,
• Anna Regtmeier,
• Camelia Albon,
• Annalena Wolff,
• Katrin Eckstädt,
• Nadine Mill,
• Michael K.-H. Peter,
• Jochen Mattay,
• Carolin Plattner,
• Norbert Sewald and
• Andreas Hütten

Beilstein J. Nanotechnol. 2010, 1, 75–93, doi:10.3762/bjnano.1.10

• resemble the shape of rods. However, on tilting the sample, they may easily be identified as nanodisks [10][15]. A more detailed analysis of the rows reveals a size gradient along the superstructures; disks of larger radius are placed further towards the center [51]. Individual rows of disks propagate in a

• can be controlled by the application of an external field during the deposition [15]. Figure 11(b) shows a typical arrangement of nanodisks if no external field was applied during the self-assembly. By applying an in-plane magnetic field of 160 kA/m, the configuration shown in Figure 11(c) is obtained