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Search for "metal nanoparticles" in Full Text gives 204 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

Plasmonic nanotechnology for photothermal applications – an evaluation

  • A. R. Indhu,
  • L. Keerthana and
  • Gnanaprakash Dharmalingam

Beilstein J. Nanotechnol. 2023, 14, 380–419, doi:10.3762/bjnano.14.33

Graphical Abstract
  • materials [7][8], such as Au nanoparticles (AuNPs), in photodynamic therapy [9][10][11]. Metal nanoparticles in general have been extensively explored in PPT applications due to their high free electron density and the possibility of intricate tuning of light absorption [12]. Noble metal nanoparticles with
  • the phonon modes leads to an increase in temperature of the metal nanoparticles, and the ultimate conduction of this heat to the surrounding. The exchange time will vary for small nanoparticles due to quantum confinement effects [65] observed when the size of the nanoparticle is comparable to the Bohr
  • thermal conductivity and absorption power of the surrounding medium. The temperature increase in the metal nanoparticles (ΔTNP) and thermal capacitance coefficient can be calculated using the following equation [96]: I is the illumination intensity of the laser source, σabs is the absorption cross section
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Published 27 Mar 2023

New trends in nanobiotechnology

  • Pau-Loke Show,
  • Kit Wayne Chew,
  • Wee-Jun Ong,
  • Sunita Varjani and
  • Joon Ching Juan

Beilstein J. Nanotechnol. 2023, 14, 377–379, doi:10.3762/bjnano.14.32

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  • thematic issue covered topics related to new concepts and ideas pertaining to the design and development of nanobiotechnology. These works include “The role of deep eutectic solvents and carrageenan in synthesizing biocompatible anisotropic metal nanoparticles” [4]. This review sheds light onto significant
  • works involving the synthesis of metal nanoparticles using environmentally friendly wet chemical methods in which carrageenan is the main resource. The review summarises the possibility of creating a safe and non-toxic path to the synthesis of nanomaterials while maintaining its properties, such as
  • agent for nanomaterials synthesis. The review is concluded providing an outlook of these two components (i.e., deep eutectic solvents and carrageenan) as alternatives for the formation of plasmonic metal nanoparticles. The importance of applying these tools to improve the physicochemical properties and
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Editorial
Published 27 Mar 2023

Quercetin- and caffeic acid-functionalized chitosan-capped colloidal silver nanoparticles: one-pot synthesis, characterization, and anticancer and antibacterial activities

  • Akif Hakan Kurt,
  • Elif Berna Olutas,
  • Fatma Avcioglu,
  • Hamza Karakuş,
  • Mehmet Ali Sungur,
  • Cansu Kara Oztabag and
  • Muhammet Yıldırım

Beilstein J. Nanotechnol. 2023, 14, 362–376, doi:10.3762/bjnano.14.31

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  • range of uses such as antibacterial and antimicrobial agents, healthcare-related products, medical device coatings, anticancer agents, optical sensors, anti-inflammatory agents, biocatalysts, cosmetics, and biosensors [41][42][43][44][45]. The combination of polymer-coated metal nanoparticles
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Published 20 Mar 2023

Overview of mechanism and consequences of endothelial leakiness caused by metal and polymeric nanoparticles

  • Magdalena Lasak and
  • Karol Ciepluch

Beilstein J. Nanotechnol. 2023, 14, 329–338, doi:10.3762/bjnano.14.28

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  • : endothelial leakiness; metal nanoparticles; NanoEL; nanotoxicity; vascular permeability; Review Introduction The vascular barrier is a highly selective boundary between blood and tissues. Its proper functioning is essential to maintaining homeostasis of the whole organism. Formed from mesodermal endothelial
  • whose therapeutic success depends on the effective drug delivery to the target sites through highly selective vascular barriers. A relatively new method that overcomes the endothelial barrier is the use of nanoparticles (NPs), especially different metal nanoparticles, for example, Au or Ti nanoparticles
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Published 08 Mar 2023

Combining physical vapor deposition structuration with dealloying for the creation of a highly efficient SERS platform

  • Adrien Chauvin,
  • Walter Puglisi,
  • Damien Thiry,
  • Cristina Satriano,
  • Rony Snyders and
  • Carla Bittencourt

Beilstein J. Nanotechnol. 2023, 14, 83–94, doi:10.3762/bjnano.14.10

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  • detection properties are mostly observed in noble metal nanoparticles [2][9][10]. Allowed by their localized surface plasmon resonance (LSPR) in the visible region, silver and gold are the most used materials for the preparation of SERS substrates [11][12]. Although Ag has a higher surface plasmon
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Published 11 Jan 2023

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

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  • give rise to a collective oscillation known as surface plasmon effect [34]. This effect can be monitored by UV–vis spectroscopy, where metal nanoparticles absorb radiation at different wavelengths depending on their size [36]. The UV–vis absorption spectra of the reactions at different temperatures are
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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

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  • surface-to-volume ratio [37][38][43][44][45][46]. Biomolecules such as DNA may readily modify AuNPs by adding thiol and amine groups via Au–S or Au–N links without losing their activity [38][47]. In electrocatalytic applications, the combination of carbon-based materials with metal nanoparticles has been
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Published 06 Dec 2022

Supramolecular assembly of pentamidine and polymeric cyclodextrin bimetallic core–shell nanoarchitectures

  • Alexandru-Milentie Hada,
  • Nina Burduja,
  • Marco Abbate,
  • Claudio Stagno,
  • Guy Caljon,
  • Louis Maes,
  • Nicola Micale,
  • Massimiliano Cordaro,
  • Angela Scala,
  • Antonino Mazzaglia and
  • Anna Piperno

Beilstein J. Nanotechnol. 2022, 13, 1361–1369, doi:10.3762/bjnano.13.112

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  • combination of noble metal nanoparticles (NPs) with conventional antimicrobial drugs, are considered the next generation of antimicrobial agents. Therefore, there is an increasing demand for rapid, eco-friendly, and relatively inexpensive synthetic approaches for the preparation of nontoxic metallic
  • during the reduction/stabilization of metal NPs was investigated for the first time by NMR spectroscopy. Keywords: antimicrobial agents; bimetallic nanoparticles; gold/silver core–shell; Leishmania; pentamidine; polycyclodextrin; Introduction Noble metal nanoparticles (NPs), in particular those
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Published 18 Nov 2022

Detection and imaging of Hg(II) in vivo using glutathione-functionalized gold nanoparticles

  • Gufeng Li,
  • Shaoqing Li,
  • Rui Wang,
  • Min Yang,
  • Lizhu Zhang,
  • Yanli Zhang,
  • Wenrong Yang and
  • Hongbin Wang

Beilstein J. Nanotechnol. 2022, 13, 549–559, doi:10.3762/bjnano.13.46

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  • the fluorescent “ON” form. Keywords: cell imaging; fluorescence probes; glutathione; gold nanoparticles; mercury ions; rhodamine 6G derivatives; Introduction Metal nanoparticles have been widely used in the development and construction of sensor systems and drug carriers due to their excellent
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Published 23 Jun 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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  • fluorescence (SEF), these techniques have shown huge potential for applications in biomedicine, biotechnology, and optical sensors. Both methods rely on the high electromagnetic fields created at locations on the surface of plasmonic metal nanoparticles, depending on the geometry of the nanoparticles, their
  • as well as on tuning the photoluminescence properties of ZnO nanostructures through combination with metal nanoparticles. This review covers the major recent results of ZnO-based nanostructures used for fluorescence and Raman signal enhancement. The broad range of ZnO and ZnO–metal nanostructures
  • noble metal nanoparticles and the molecular fluorescence enhancement in the presence of ZnO alone and in combination with metal nanoparticles are also reviewed. Keywords: fluorescence; surface-enhanced Raman spectroscopy; ZnO–metal nanomaterials; ZnO nanostructures; Introduction Over the last decades
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Published 27 May 2022

A non-enzymatic electrochemical hydrogen peroxide sensor based on copper oxide nanostructures

  • Irena Mihailova,
  • Vjaceslavs Gerbreders,
  • Marina Krasovska,
  • Eriks Sledevskis,
  • Valdis Mizers,
  • Andrejs Bulanovs and
  • Andrejs Ogurcovs

Beilstein J. Nanotechnol. 2022, 13, 424–436, doi:10.3762/bjnano.13.35

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  • ]. Nanostructured materials are widely used as the working surface of the electrode [47][48][49]. The most common are transition metal nanoparticles [33][37][50][51][52][53][54], carbon nanotubes [8], metal oxides [55][56][57][58][59][60][61][62][63][64], graphene [32][33], and ordered mesoporous carbon [38][65][66
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Published 03 May 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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  • concentration, and temperature during the electrodeposition of copper. The samples were characterized using XRD and SEM. The output performance of the TENG is closely related to the size, charge density distribution, and shape of the metal nanoparticles. Keywords: charge density; green energy; metal
  • not reduced. Subsequently, the SEM images were analyzed and processed by using the Matlab edge detection algorithm, and the IMOVERLAY script in Matlab File Exchange was used for pixel analysis. Thus, the percentage of the substrate area without metal nanoparticles was calculated by the percentage of
  • . There is no potential at this stage, so the transferred charge will accumulate in the gap of metal nanoparticles, and the charge accumulation will have a positive impact on the output performance. However, when the substrate area without nanoparticles is too large, the decrease in the number of metal
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Published 15 Mar 2022

Surfactant-free syntheses and pair distribution function analysis of osmium nanoparticles

  • Mikkel Juelsholt,
  • Jonathan Quinson,
  • Emil T. S. Kjær,
  • Baiyu Wang,
  • Rebecca Pittkowski,
  • Susan R. Cooper,
  • Tiffany L. Kinnibrugh,
  • Søren B. Simonsen,
  • Luise Theil Kuhn,
  • María Escudero-Escribano and
  • Kirsten M. Ø. Jensen

Beilstein J. Nanotechnol. 2022, 13, 230–235, doi:10.3762/bjnano.13.17

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  • -free synthesis of precious metal nanoparticles (NPs) performed in alkaline low-boiling-point solvents has been recently reported. Monoalcohols are here investigated as solvents and reducing agents to obtain colloidal Os nanoparticles by using low-temperature (<100 °C) surfactant-free syntheses. The
  • ] complexes. Keywords: metal nanoparticles; osmium; pair distribution function; surfactant-free synthesis; Findings Precious metals are limited resources, yet fundamental for a range of applications, such as in medicine or catalysis [1][2][3]. There are relatively few reports on osmium (Os) compared to
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Published 16 Feb 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

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Published 04 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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  • et al. [62] self-assembled metal nanoparticles with good catalytic activity by coordination of histidine derivatives N-(benzyloxycarbonyl)-ʟ-histidinohydrazide with zinc ions on a minimum design principle. The catalytic performance of p-nitrophenyl acetate hydrolysis to p-nitrophenol was evaluated by
  • monitoring the absorbance of p-nitrophenol at 400 nm. The catalytic formation of p-nitrophenol started within the first three minutes and then gradually increased. The catalytic rate constant of metal nanoparticles was higher than that of lipase (6.00 × 10−2 and 6.95 × 10−3 s−1, respectively). In addition
  • , the substrate affinity of metal nanoparticles (1.53 mM) is comparable to that of natural lipase (1.27 mM). Metal ions, especially silver ions (Ag+), have been widely studied regarding antibacterial, antifungal, antiviral, anti-inflammatory, anti-angiogenic, and antitumor activities [63][64]. Silver
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Published 12 Oct 2021

Assessment of the optical and electrical properties of light-emitting diodes containing carbon-based nanostructures and plasmonic nanoparticles: a review

  • Keshav Nagpal,
  • Erwan Rauwel,
  • Frédérique Ducroquet and
  • Protima Rauwel

Beilstein J. Nanotechnol. 2021, 12, 1078–1092, doi:10.3762/bjnano.12.80

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  • employed in display applications and lighting systems. Further research on LED that incorporates carbon nanostructures and metal nanoparticles exhibiting surface plasmon resonance has demonstrated a significant improvement in device performance. These devices offer lower turn-on voltages, higher external
  • as the emissive layer (EML), the hole transport layers (HTL), the electron transport layers (ETL), the cathode, and the anode [17][18][19][20][21]. Enhancement in LED properties via surface plasmon resonance (SPR) of metal nanoparticles (MNP) such as Au and Ag have also been reported [22][23]. This
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Published 24 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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  • collector. As a result, the sodium polysulfide/MWCNT fabric cathode delivers a discharge capacity of 400 mAh·g−1 after 30 cycles. Transition metal nanoparticles as polysulfide sequestrants and electrocatalysts As discussed above, hollow and porous carbonaceous structures, and in particular nitrogen or
  • ]. Therefore, the shuttle effect often cannot be avoided. In order to solve this limitation, transition metal nanoparticles (NPs) or compounds are incorporated in the cathode. The metallic species is bonded to the carbon skeleton creating a dipole, which leads to dipole–dipole interactions with the
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Published 09 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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  • ), Ghaziabad 201002, India 10.3762/bjnano.12.69 Abstract Plasmonic metal nanoparticles are widely used for many applications due to their unique optical and chemical properties. Over the past decade, anisotropic metal nanoparticles have been explored for imaging, sensing, and diagnostic applications. The
  • variations and flexibility of tuning the size and shape of the metal nanoparticles at the nanoscale made them promising candidates for biomedical applications such as therapeutics, diagnostics, and drug delivery. However, safety and risk assessment of the nanomaterials for clinical purposes are yet to be
  • of gold and silver nanoparticles. Surface plasmon resonance is an inherent property of plasmonic metal nanoparticles that is immensely employed as a tool for theranostics and is highly influenced by the size and shape of the nanoparticle [2]. The property of SPR has also been exploited for nanochips
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Published 18 Aug 2021

On the stability of microwave-fabricated SERS substrates – chemical and morphological considerations

  • Limin Wang,
  • Aisha Adebola Womiloju,
  • Christiane Höppener,
  • Ulrich S. Schubert and
  • Stephanie Hoeppener

Beilstein J. Nanotechnol. 2021, 12, 541–551, doi:10.3762/bjnano.12.44

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  • . Van Duyne and others elaborated the fundamental concept of the enhancement process, which was found to be mainly based on the amplification of the electric field component when the illuminating laser irradiation interacts with metal nanoparticles [6]. Suitable nanoparticles consist preferentially of
  • fabrication costs, as well as the stability of the SERS substrates to enable their universal applicability [7]. The microwave-assisted synthesis of nanoparticles is by now an established method for the synthesis of uniform metal nanoparticles in solution, which can be applied to fabricate SERS substrates by
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Published 11 Jun 2021

Surface-enhanced Raman scattering of water in aqueous dispersions of silver nanoparticles

  • Paulina Filipczak,
  • Krzysztof Hałagan,
  • Jacek Ulański and
  • Marcin Kozanecki

Beilstein J. Nanotechnol. 2021, 12, 497–506, doi:10.3762/bjnano.12.40

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  • of the spectrum among studied samples, (ii) by the surface enhancement effects for water molecules in the neighbourhood of metal nanoparticles, or (iii) by the “structure-ordering” character of AgNPs for water. Some of the reports show that the water structure forms a specific conformation on the
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Published 25 May 2021

Rapid controlled synthesis of gold–platinum nanorods with excellent photothermal properties under 808 nm excitation

  • Jialin Wang,
  • Qianqian Duan,
  • Min Yang,
  • Boye Zhang,
  • Li Guo,
  • Pengcui Li,
  • Wendong Zhang and
  • Shengbo Sang

Beilstein J. Nanotechnol. 2021, 12, 462–472, doi:10.3762/bjnano.12.37

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  • . Keywords: AuNRs; local surface plasmon resonance (LSPR); photothermal conversion efficiency; photothermal transduction agents; platinum; Introduction On the surface of noble metal nanoparticles, when the wavelength of incident light resonates with the light absorption wavelength of the nanoparticles, a
  • significant part of the photon energy is absorbed through LSPR [1][2]. The LSPR effect excites the free conduction band electrons and energy is released in the form of heat through nonradiative decay [3][4]. Au, Ag, Pt, and other noble metal nanoparticles all exhibit an obvious LSPR effect and strong spectral
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Published 17 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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  • mbar for several days. Then rGO was dispersed with Ni(COD)2 in [BMIm][NTf2] to gain 0.5 wt % metal nanoparticles and 0.5 wt % rGO. In order to stir the reaction mixture during the microwave decomposition, 0.5 wt % rGO could not be exceeded. The obtained nanomaterial was analyzed using powder X-ray
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Published 15 Apr 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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  • seen as an opportunity to utilize plants and their components for the reduction of metal cations and synthesis of metal nanoparticles such as AgNPs. The synthesis of AgNPs by plants and their components may be categorized into in vivo and in vitro synthesis processes [140]. The in vivo synthesis refers
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Published 25 Jan 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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  • usually exhibit new chemical and physical properties in comparison to conventional bulk materials due to the much higher surface-to-volume ratio. Even these unusual properties of the metal nanoparticles can be changed and fine-tuned by adjusting their size, shape, and chemical composition. Thus, several
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Published 19 Jan 2021

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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  • dominant mechanism [13]. This work presents the integration of the MACE process at the wafer level using several metal nanoparticles as catalysts for the reduction process (Equation 1). The aim is to generate a high aspect ratio template of silicon. This template has to be fully integrable into a common
  • The fabrication of the wafer-level integrated nanostructure templates is divided into two main parts, i.e., the formation of the noble metal nanoparticles, and the subsequent silicon wet etching process. The subsidiary process steps are standard semiconductor processes and therefore not analysed and
  • , and a cool-down phase. The annealing temperatures were 300 °C for Au and Cu, 500 °C for Pd, and 590 °C for Pt, respectively. The annealed wafers with the noble metal nanoparticles have been coated with a masking layer. We selected PMMA due to its chemical stability against HF and H2O2. These masking
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Published 23 Sep 2020
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