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Search for "plasmonic" in Full Text gives 242 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

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

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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  • were so low, the change in optical properties was attributed to the local accumulation of defects (as opposed to collisional phase mixing). In a plasmonic application, resonant triangular nanostructures were created in a graphene sheet supported on SiO2/Si by selectively irradiating the graphene in the
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Published 02 Jul 2021

High-yield synthesis of silver nanowires for transparent conducting PET films

  • Gul Naz,
  • Hafsa Asghar,
  • Muhammad Ramzan,
  • Muhammad Arshad,
  • Rashid Ahmed,
  • Muhammad Bilal Tahir,
  • Bakhtiar Ul Haq,
  • Nadeem Baig and
  • Junaid Jalil

Beilstein J. Nanotechnol. 2021, 12, 624–632, doi:10.3762/bjnano.12.51

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  • have gained much attention in replacing ITO because of their low-cost solution-based fabrication, flexibility, and high optical transparency [14][15]. A large-scale uniform synthesis of AgNWs with high aspect ratio would be greatly preferred because of better plasmonic and optical properties [16]. An
  • redshift of the peak positions. An overall hypsochromatic shift of the two plasmonic bands of AgNWs is accompanied by the enhancement of their aspect ratios. The SPR peak at 365 nm may be attributed to the plasmon response along the transverse axis of AgNWs, which is identical to that of bulk silver. The
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Published 01 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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  • induce the production of hot electrons from plasmonic metals, while larger size nanoparticles favor the scattering of the light. There is a strong electromagnetic field that is produced by fast and coherent oscillating electrons which extend into the metal and the surrounding environment [62][63]. The
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Published 14 May 2021

Colloidal particle aggregation: mechanism of assembly studied via constructal theory modeling

  • Scott C. Bukosky,
  • Sukrith Dev,
  • Monica S. Allen and
  • Jeffery W. Allen

Beilstein J. Nanotechnol. 2021, 12, 413–423, doi:10.3762/bjnano.12.33

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  • variety of applications, including plasmonic/photonic devices, metamaterials, biomaterials and coatings, energetic materials, and high-strength ceramics [15][16][17][18][19][20][21][22][23][24][25]. Most applications, however, require precise manipulation of the particle placement, spacing, and
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Published 06 May 2021

The impact of molecular tumor profiling on the design strategies for targeting myeloid leukemia and EGFR/CD44-positive solid tumors

  • Nikola Geskovski,
  • Nadica Matevska-Geshkovska,
  • Simona Dimchevska Sazdovska,
  • Marija Glavas Dodov,
  • Kristina Mladenovska and
  • Katerina Goracinova

Beilstein J. Nanotechnol. 2021, 12, 375–401, doi:10.3762/bjnano.12.31

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  • activating the extracellular domain of membranous EGFR and influencing the EGFR signaling pathways through increased endocytosis (receptor internalization) and cytoplasmic accumulation of EGFR. In the study of Yokoyama et al. paramagnetic gold-coated plasmonic NPs (40–50 nm) with iron core and anti-EGFR
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Published 29 Apr 2021

Structural and optical characteristics determined by the sputtering deposition conditions of oxide thin films

  • Petronela Prepelita,
  • Florin Garoi and
  • Valentin Craciun

Beilstein J. Nanotechnol. 2021, 12, 354–365, doi:10.3762/bjnano.12.29

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  • properties. Transparent oxides are an attractive class of plasmonic materials which are under intense study for their integration into low-loss metamaterial structures and a series of applications in transformation optics, sensors, and imaging. Here we used oxide thin films and studied their optical
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Published 19 Apr 2021

The patterning toolbox FIB-o-mat: Exploiting the full potential of focused helium ions for nanofabrication

  • Victor Deinhart,
  • Lisa-Marie Kern,
  • Jan N. Kirchhof,
  • Sabrina Juergensen,
  • Joris Sturm,
  • Enno Krauss,
  • Thorsten Feichtner,
  • Sviatoslav Kovalchuk,
  • Michael Schneider,
  • Dieter Engel,
  • Bastian Pfau,
  • Bert Hecht,
  • Kirill I. Bolotin,
  • Stephanie Reich and
  • Katja Höflich

Beilstein J. Nanotechnol. 2021, 12, 304–318, doi:10.3762/bjnano.12.25

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  • -mat are presented. Keywords: automated patterning; focused He ion beam; graphene; magnetic multilayers; mechanical resonator; pattern generation; plasmonic antennas; two-dimensional materials; Introduction Future breakthroughs in nanotechnology will rely on the ability to fabricate materials and
  • ubiquitous in ion beam machining with well-established applications in material characterization, for example, TEM lamella fabrication, cross sections or tomographies [19][20], or in the fabrication of prototype nanostructures, such as plasmonic antennas [2]. In contrast, appropriate fields of application
  • , and the fabrication of coupled plasmonic nanoantennas from single-crystalline gold. The three latter examples are realized in this work by developing optimized patterning and automation routines [18]. Patterning and Beam Control Patterning with an ion beam is a digital process where the beam spot
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Published 06 Apr 2021

Doxorubicin-loaded gold nanorods: a multifunctional chemo-photothermal nanoplatform for cancer management

  • Uzma Azeem Awan,
  • Abida Raza,
  • Shaukat Ali,
  • Rida Fatima Saeed and
  • Nosheen Akhtar

Beilstein J. Nanotechnol. 2021, 12, 295–303, doi:10.3762/bjnano.12.24

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  • , nanorods, nanoshells, and nanocages) have great potential in photothermal cancer therapy due to plasmonic properties and the ease of biofunctionalization. Gold nanorods (GNRs) are more preferable than other gold nanomaterials because of their photothermal conversion efficiency. Better nanotherapeutics can
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Published 31 Mar 2021

A review on the green and sustainable synthesis of silver nanoparticles and one-dimensional silver nanostructures

  • Sina Kaabipour and
  • Shohreh Hemmati

Beilstein J. Nanotechnol. 2021, 12, 102–136, doi:10.3762/bjnano.12.9

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Published 25 Jan 2021

Fabrication of nano/microstructures for SERS substrates using an electrochemical method

  • Jingran Zhang,
  • Tianqi Jia,
  • Xiaoping Li,
  • Junjie Yang,
  • Zhengkai Li,
  • Guangfeng Shi,
  • Xinming Zhang and
  • Zuobin Wang

Beilstein J. Nanotechnol. 2020, 11, 1568–1576, doi:10.3762/bjnano.11.139

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  • /nanopore; nano/microstructures; SERS substrate; Introduction Surface-enhanced Raman spectroscopy (SERS) can be used to detect biomolecules [1][2][3], explosives [4][5][6], and pesticide residues [7][8][9]. Plasmonic metal nanostructures are often used as SERS substrates to increase the molecule-specific
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Published 16 Oct 2020

Optically and electrically driven nanoantennas

  • Monika Fleischer,
  • Dai Zhang and
  • Alfred J. Meixner

Beilstein J. Nanotechnol. 2020, 11, 1542–1545, doi:10.3762/bjnano.11.136

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  • configurations with increasing control over their optical performance [1][2][3][4]. The strong local near-field enhancement by plasmonic nanoantennas is being harnessed for high sensitivity, high-resolution optical nanospectroscopy techniques [5], such as surface-enhanced or tip-enhanced Raman spectroscopy (SERS
  • top-down approaches such as thin film deposition and nanopatterning, as well as bottom-up approaches such as chemical synthesis and self-assembly [38]. Gap sizes may range from a few tens of nanometers down to sub-nanometer tunnel junctions, where the classical description of the plasmonic behavior
  • deposition [41], or on dense silver island films created by pulsed laser deposition [42] or physical vapor deposition [43]. In [44], individual plasmonic nanotags are prepared by coating gold nanoparticle clusters with Raman reporters. This work explores the minimum number of tags required for obtaining a
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Published 07 Oct 2020

Revealing the local crystallinity of single silicon core–shell nanowires using tip-enhanced Raman spectroscopy

  • Marius van den Berg,
  • Ardeshir Moeinian,
  • Arne Kobald,
  • Yu-Ting Chen,
  • Anke Horneber,
  • Steffen Strehle,
  • Alfred J. Meixner and
  • Dai Zhang

Beilstein J. Nanotechnol. 2020, 11, 1147–1156, doi:10.3762/bjnano.11.99

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  • can be obtained by rotating the prism while collecting optical spectra. The circle pattern is originating from the emission of the plasmonic oscillation along the tip shaft. This is in good agreement with the electric field distribution in the focus of a radially polarized laser beam, where the
  • further increase the resolution a chemically etched gold tip, attached to a tuning fork, is brought into the focus [37][38][39][40][41]. A plasmonic oscillation is generated at the tip apex by the excitation with a radially polarized laser beam along the tip axis. Here, the local field intensity is
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Published 31 Jul 2020

Photothermally active nanoparticles as a promising tool for eliminating bacteria and biofilms

  • Mykola Borzenkov,
  • Piersandro Pallavicini,
  • Angelo Taglietti,
  • Laura D’Alfonso,
  • Maddalena Collini and
  • Giuseppe Chirico

Beilstein J. Nanotechnol. 2020, 11, 1134–1146, doi:10.3762/bjnano.11.98

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  • nanoparticles are due to the resonant oscillation of the surface electrons, called surface plasmons (e.g., plasmonic gold and silver nanoparticles) [38], or they are due to the energy of the band transitions (e.g., Cu2+ d–d transition in CuS nanoparticles) [39]. Under visible–NIR light irradiation, these
  • nanomaterial used, for example, aqueous solutions, self-assembled monolayers or polymeric nanocomposites [33]. In the case of plasmonic nanoparticles, the plasmonic properties (i.e., the maximum position of the absorption band and the band shape) are strongly affected by the conditions under which the
  • nanoparticles are synthesized, resulting in nanoparticles with different dimensions and shape. On the other hand, the nanoparticle surface chemistry as well as the surrounding environment exert a weaker influence on the plasmonic properties. For the non-plasmonic nanoparticles, the photothermal properties are
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Published 31 Jul 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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  • nanodots, so-called plasmonic tweezers [6][7][8] or a fluidic slit with appropriately tailored topography with resulting spatially modulated electrostatic potential [9] can be used to trap nanoparticles, but again a prefabricated nanostructured substrate is needed. A decade ago, the anti-Brownian
  • microbeaker” to confine the motion of a single nano-object. For the creation of high thermal gradients, their approach requires prefabricated plasmonic structures, which results in a big drawback: the confinement of an object is possible just within the structure, i.e., the object can not be freely
  • tweezers is that the former uses a plasmonic nanostructure to create large local temperature gradients of the order of 100 K/μm, while the temperature gradients in our experiments, using a uniform substrate, are approximately ten times lower. To understand the effect of the gradient ∇T, one can define the
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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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  • -enhanced Raman scattering (SERS) sensors for the detection of 17β-estradiol. Gold deposition on top of a TiO2 surface leads to the formation of nanoparticles the plasmonic properties of which fulfil the requirements of a SERS sensor. The morphological and optical properties of the surface were investigated
  • 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
  • aggressive solvents, which can induce damage especially in delicate applications involving polymeric substrates. Also, the control over the size and shape of AuNPs and, thus, over their plasmonic behavior is often limited. Here, we propose the use of a nanostructured hierarchically organized TiO2 film as a
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Published 14 Jul 2020

Electrochemical nanostructuring of (111) oriented GaAs crystals: from porous structures to nanowires

  • Elena I. Monaico,
  • Eduard V. Monaico,
  • Veaceslav V. Ursaki,
  • Shashank Honnali,
  • Vitalie Postolache,
  • Karin Leistner,
  • Kornelius Nielsch and
  • Ion M. Tiginyanu

Beilstein J. Nanotechnol. 2020, 11, 966–975, doi:10.3762/bjnano.11.81

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  • electrochemically filling the pores with metallic nanostructures such as nanowires or nanotubes, resulting in the production of 2D metallo-semiconductor interpenetrating networks, which are promising for various nanoelectronic, optoelectronic, plasmonic, and nanophotonic applications [4][5][6]. While the growth of
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Published 29 Jun 2020

A set of empirical equations describing the observed colours of metal–anodic aluminium oxide–Al nanostructures

  • Cristina V. Manzano,
  • Jakob J. Schwiedrzik,
  • Gerhard Bürki,
  • Laszlo Pethö,
  • Johann Michler and
  • Laetitia Philippe

Beilstein J. Nanotechnol. 2020, 11, 798–806, doi:10.3762/bjnano.11.64

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  • (AAO) films; anodization; structural colours; reflectance; polar coordinates; plasmonic effects; Introduction Recently, the reproduction of the vivid colours found in nature has received increasing interest [1]. These colours appear when light interacts with periodic structures. With regard to this
  • observed before [18][19]. In both cases, after the deposition of 8 nm of Cr and 10 nm of Au on top of the AAO–Al films (Figure 2b and Figure 2c, respectively), a blueshift and a decrease in the reflectance is observed due to plasmonic effects [4][11][13]. The wavelength of each sample and consequently the
  • used in order to obtain different colours of the metal–AAO–Al nanostructures due the different plasmonic effects in both metals. In addition, three different metal thicknesses were studied (25, 17.5 and 10 nm of Au) to show the influence of metal thickness on the observed colour. It is important to
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Published 13 May 2020

Hexagonal boron nitride: a review of the emerging material platform for single-photon sources and the spin–photon interface

  • Stefania Castelletto,
  • Faraz A. Inam,
  • Shin-ichiro Sato and
  • Alberto Boretti

Beilstein J. Nanotechnol. 2020, 11, 740–769, doi:10.3762/bjnano.11.61

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  • radiative decay process resulting in very short lifetimes. A large enhancement in spontaneous emission rate (SER) is achieved by coupling the emitter’s emission to the resonance modes of photonics/plasmonic structures. These resonator structures provide the emitter with an enhanced local density of optical
  • states (LDOS) for the emission to couple to, thus enhancing the radiative decay process [74]. The enhancement in the SER is quantified in terms of the Purcell factor, which is defined as the ratio of the total SER of the emitter in the resonator to its SER in a vacuum [74]. These photonic/plasmonic
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Published 08 May 2020

Effect of Ag loading position on the photocatalytic performance of TiO2 nanocolumn arrays

  • Jinghan Xu,
  • Yanqi Liu and
  • Yan Zhao

Beilstein J. Nanotechnol. 2020, 11, 717–728, doi:10.3762/bjnano.11.59

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  • Technology, Ministry of Education, Research Institute of Laser Engineering, Beijing University of Technology, No. 100 Pingle Park, Chaoyang District, Beijing 100124, People’s Republic of China 10.3762/bjnano.11.59 Abstract Plasmonic metal/semiconductor composites have attracted great attention for efficient
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Published 05 May 2020

Luminescent gold nanoclusters for bioimaging applications

  • Nonappa

Beilstein J. Nanotechnol. 2020, 11, 533–546, doi:10.3762/bjnano.11.42

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  • an exact number of metal atoms and surface ligands (Figure 1A,B). Therefore, NCs are considered as colloidal molecules. Similar to plasmonic nanoparticles, the stability of NCs can be controlled by ligand passivation using small molecules, synthetic polymers or biomacromolecules. A significant
  • difference between plasmonic AuNPs and AuNCs can be stated regarding the sensitivity. For observable changes to occur in physicochemical properties of plasmonic NPs, at least a layer of atoms needs to be removed (ca. 0.5 nm), whereas NCs already display remarkable changes after addition or removal of a
  • single atom. Additionally, due to covalently bound ligands, the NCs show extraordinary stability under ambient conditions. While plasmonic AuNPs display size-dependent surface plasmon resonance (SPR), NCs display characteristic molecule-like electronic spectra. This is attributed to the small size and
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Published 30 Mar 2020

Evolution of Ag nanostructures created from thin films: UV–vis absorption and its theoretical predictions

  • Robert Kozioł,
  • Marcin Łapiński,
  • Paweł Syty,
  • Damian Koszelow,
  • Wojciech Sadowski,
  • Józef E. Sienkiewicz and
  • Barbara Kościelska

Beilstein J. Nanotechnol. 2020, 11, 494–507, doi:10.3762/bjnano.11.40

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  • Narutowicza 11/12, 80-233 Gdansk, Poland 10.3762/bjnano.11.40 Abstract Ag-based plasmonic nanostructures were manufactured by thermal annealing of thin metallic films. Structure and morphology were studied using scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution
  • quality of the nanostructures, in terms of their use as plasmonic platforms, is reflected in the UV–vis absorption spectra. The absorption spectrum is dominated by a maximum in the range of 450–500 nm associated with the plasmon resonance. As the initial layer thickness increases, an additional peak
  • responsible for dewetting. Especially because defects are always present in the interface between the substrate and the film. In the design of metallic nanostructure systems for plasmonic applications, the homogeneous distribution of nanostructures is very important, both in size and location on the surface
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Published 25 Mar 2020

Formation of nanoripples on ZnO flat substrates and nanorods by gas cluster ion bombardment

  • Xiaomei Zeng,
  • Vasiliy Pelenovich,
  • Bin Xing,
  • Rakhim Rakhimov,
  • Wenbin Zuo,
  • Alexander Tolstogouzov,
  • Chuansheng Liu,
  • Dejun Fu and
  • Xiangheng Xiao

Beilstein J. Nanotechnol. 2020, 11, 383–390, doi:10.3762/bjnano.11.29

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  • , suggesting a small influence of the sort of material or the crystal orientation of the substrate on the ripple formation. Recently, Saleem et al. have proposed to use the nanoripple structures formed by GCIB for plasmonic and biomolecular sensing applications [16][17]. In all above-mentioned studies planar
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Published 24 Feb 2020

Using gold nanoparticles to detect single-nucleotide polymorphisms: toward liquid biopsy

  • María Sanromán Iglesias and
  • Marek Grzelczak

Beilstein J. Nanotechnol. 2020, 11, 263–284, doi:10.3762/bjnano.11.20

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  • solution containing plasmonic nanoparticles (from red to blue) in the presence of molecules offers an excellent tool for colorimetric sensing without the need of using advanced techniques. Similarly, selective fluorescence quenching of organic dyes or semiconducting nanoparticles by plasmonic nanoparticles
  • giving rise to the so-called localized surface plasmon resonance (LSPR). The position and the bandwidth of the LSPR can be modulated by the shape of the nanocrystals and can vary between 400 and 2000 nm. The high absorption cross section (plasmonic nanoparticles absorb photons over a region about ten
  • times larger than their physical diameters) [59], and the lack of photobleaching (unlike organic fluorescent dyes and semiconductor nanocrystals) are additional parameters making plasmonic nanocrystals attractive materials for biosensing. Importantly, the position of the plasmon band and its bandwidth
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Published 31 Jan 2020

Fabrication of Ag-modified hollow titania spheres via controlled silver diffusion in Ag–TiO2 core–shell nanostructures

  • Bartosz Bartosewicz,
  • Malwina Liszewska,
  • Bogusław Budner,
  • Marta Michalska-Domańska,
  • Krzysztof Kopczyński and
  • Bartłomiej J. Jankiewicz

Beilstein J. Nanotechnol. 2020, 11, 141–146, doi:10.3762/bjnano.11.12

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  • (HSs) have received increasing attention due to their potential application in a variety of areas [1][2][3][4] such as solar energy conversion or photocatalysis [2][5][6][7]. Among them, of great interest are TiO2 HSs modified with plasmonic nanoparticles (NPs), which allow for the combination of the
  • photocatalytic properties of TiO2 and the optical properties of plasmonic NPs [2]. This combination has been shown to extent the photocatalytic activity of TiO2, which is initially limited to UV light [8], to the visible or even to the NIR range of radiation [9]. Recent examples of the fabrication of plasmonic
  • dedicated to fabrication and application of plasmonic NP-modified TiO2 HSs have been published, including those mentioned above. In most cases the methodologies used are either complex or allow only for a limited control of the nanostructure morphologies and the resulting properties. In addition, we are not
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Published 10 Jan 2020
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