Functionalized platinum nanoparticles with surface charge trigged by pH: synthesis, characterization and stability studies

• Giovanna Testa,
• Laura Fontana,
• Iole Venditti and
• Ilaria Fratoddi

Beilstein J. Nanotechnol. 2016, 7, 1822–1828, doi:10.3762/bjnano.7.175

• colloidal system. Keywords: functionalized platinum nanoparticles; pH responsive materials; synthesis of metal nanoparticles; thiol functionalization; Introduction Metal nanoparticles (MNPs), in particular, platinum nanoparticles (PtNPs) offer a wide range of chemico-physical properties that can be of

Surface-enhanced infrared absorption studies towards a new optical biosensor

• Lothar Leidner,
• Julia Stäb,
• Jennifer T. Adam and
• Günter Gauglitz

Beilstein J. Nanotechnol. 2016, 7, 1736–1742, doi:10.3762/bjnano.7.166

• is caused by very thin metal films evaporated on a substrate, which consist of isolated islands with dimensions much smaller than the wavelength of light. According to Osawa, the island nature of the metal films is essential for the SEIRA effect. Therefore, it seems obvious to study SEIRA using metal

• nanoparticles. According to Yang and Griffiths [12], the ideal substrate for SEIRA is a thin film of isolated nanoparticles distributed over a suitable infrared transparent substrate. They report enhancement factors of approximately 100 for silver nanoparticles on a germanium substrate. An interesting approach

Hydrophilic silver nanoparticles with tunable optical properties: application for the detection of heavy metals in water

• Paolo Prosposito,
• Federico Mochi,
• Erica Ciotta,
• Mauro Casalboni,
• Fabio De Matteis,
• Iole Venditti,
• Laura Fontana,
• Giovanna Testa and
• Ilaria Fratoddi

Beilstein J. Nanotechnol. 2016, 7, 1654–1661, doi:10.3762/bjnano.7.157

• the field of sensors for specific analytes [7][8][9][10]. In particular, given their flexible and easy preparation, large specific surface area, and surface plasmon resonance (SPR) properties, metal nanoparticles are excellent candidates for a wide variety of applications ranging from catalysis [11

• by tyrosine and the heavy metal sensing performance was measured by observing the shift of SPR band. In this case the low detection limit for Cu(II) is attributed to the high quality of the AgNPs. From the perspective of optimizing the properties of metal nanoparticles, research groups have focused

• on the control of the size and shape of nanoparticles [34][35], which is crucial in tuning their physical, chemical and optical properties [36][37][38]. Electrochemical, photochemical, sonochemical and chemical reduction methods can be used for the synthesis of metal nanoparticles [39][40][41][42][43

Photothermal effect of gold nanostar patterns inkjet-printed on coated paper substrates with different permeability

• Mykola Borzenkov,
• Anni Määttänen,
• Petri Ihalainen,
• Maddalena Collini,
• Elisa Cabrini,
• Giacomo Dacarro,
• Piersandro Pallavicini and
• Giuseppe Chirico

Beilstein J. Nanotechnol. 2016, 7, 1480–1485, doi:10.3762/bjnano.7.140

• effect; Introduction Due to advantages over other patterning techniques, inkjet printing technology has met important challenges to pattern a broad range of functional materials with promising biomedical application [1][2][3][4][5][6][7]. Inks based on metal nanoparticles are widely used in inkjet

• printing because of their conductive and thermal properties [1][8]. Within the existing types of metal nanoparticles, the beneficial properties of gold, such as good biocompatibility, excellent resistance to oxidation and acids, and high affinity to thiol containing biomolecules promote the applicability

Tunable longitudinal modes in extended silver nanoparticle assemblies

• Serene S. Bayram,
• Klas Lindfors and
• Amy Szuchmacher Blum

Beilstein J. Nanotechnol. 2016, 7, 1219–1228, doi:10.3762/bjnano.7.113

• of a well-defined bimodal spectral response. These parameters can be chemically manipulated, resulting in tunable optical properties throughout the visible range. The optical properties of metal nanoparticles are primarily derived from interactions between electromagnetic waves and delocalized

Fast diffusion of silver in TiO₂ nanotube arrays

• Wanggang Zhang,
• Yiming Liu,
• Diaoyu Zhou,
• Hui Wang,
• Wei Liang and
• Fuqian Yang

Beilstein J. Nanotechnol. 2016, 7, 1129–1140, doi:10.3762/bjnano.7.105

• -dimensional structures. To increase the electric performance of TiO2, TiO2-based materials have been developed by incorporating metal nanoparticles in TiO2 nanotube arrays, using electrochemical deposition [21], irradiation of microwave [22], reduction [23], and sol–gel process [24], which involve the use of

Multiwalled carbon nanotube hybrids as MRI contrast agents

• Nikodem Kuźnik and
• Mateusz M. Tomczyk

Beilstein J. Nanotechnol. 2016, 7, 1086–1103, doi:10.3762/bjnano.7.102

• magnetic character of MWCNTs originates from residual metal nanoparticles incorporated during the synthesis. It is further altered by intentional introduction of other magnetic species such as SPIO. The magnetic properties are determined by the superconducting quantum interference (SQUID) technique

Sandwich-like layer-by-layer assembly of gold nanoparticles with tunable SERS properties

• Zhicheng Liu,
• Lu Bai,
• Guizhe Zhao and
• Yaqing Liu

Beilstein J. Nanotechnol. 2016, 7, 1028–1032, doi:10.3762/bjnano.7.95

• mainly driven by electrostatic interaction. Especially, multilayer thin films consisting of polymers and metal nanoparticles (NPs) have been extensively explored, and show interesting optical and SERS properties [9][10][11][12][13][14]. Wang and Dong et al. reported that polyelectrolyte–gold nanorod

A terahertz-vibration to terahertz-radiation converter based on gold nanoobjects: a feasibility study

• Kamil Moldosanov and
• Andrei Postnikov

Beilstein J. Nanotechnol. 2016, 7, 983–989, doi:10.3762/bjnano.7.90

• transform into radiative energy of the THz range? It turns out that in metal nanoparticles, the LAVMs can be converted into electromagnetic waves with the help of Fermi electrons. Our idea consists of the simultaneous excitation of these latter by exposing them to a THz field of longitudinal phonon and

The role of morphology and coupling of gold nanoparticles in optical breakdown during picosecond pulse exposures

• Yevgeniy R. Davletshin and
• J. Carl Kumaradas

Beilstein J. Nanotechnol. 2016, 7, 869–880, doi:10.3762/bjnano.7.79

• ] provided a theoretical analysis of short pulse interactions with spherical noble-metal nanoparticles, while Boulais et al. [31] developed a model of plasma-mediated nanocavitation for gold nanospheres and nanorods [31][37]. The model by Bisker and Yelin [42] is based on Mie theory and rate equations for

Templated green synthesis of plasmonic silver nanoparticles in onion epidermal cells suitable for surface-enhanced Raman and hyper-Raman scattering

• Marta Espina Palanco,
• Klaus Bo Mogensen,
• Marina Gühlke,
• Zsuzsanna Heiner,
• Janina Kneipp and
• Katrin Kneipp

Beilstein J. Nanotechnol. 2016, 7, 834–840, doi:10.3762/bjnano.7.75

• salts [5][6], but also more eco-friendly compounds such as glucose or starch can be used for the preparation of metal nanoparticles [7][8]. Overall, various reducing and stabilization agents as well as variations in experimental conditions during the preparation process, such as the influence of light

• bacteria provide chemicals suitable for the preparation of metal nanoparticles [13][14]. For example, different parts of plants contain polysaccharides, phenolics, or flavonoids, to mention only a few compounds, which could serve as reducing and also stabilizing agents. The preparation of silver and gold

• stabilizing agents. This gives rise to a broad variety of parameters in the green preparation process, resulting in metal nanoparticles of different sizes and shapes. While pre-treated plant materials such as extract and juice have been used in former studies [14][15][18][19][20]. In this article, we

Microscopic characterization of Fe nanoparticles formed on SrTiO₃(001) and SrTiO₃(110) surfaces

• Miyoko Tanaka

Beilstein J. Nanotechnol. 2016, 7, 817–824, doi:10.3762/bjnano.7.73

• microscopy (TEM); Wulff construction; Introduction Metal nanoparticles on oxide substrates are one of the key materials in modern technology. Not only are they widely used in catalysis, there are also potential applications in nanoelectronics, spintronics, photonics, sensors, and fuel cells [1][2][3][4][5

• and polarities [6][7][8][9][10]. SrTiO3 (STO) is one of the substrate materials being extensively studied for these purposes. Attempts have been made to grow metal nanoparticles of controlled sizes and morphologies on its surface by using chemical etching, controlling geometry, fabricating

Direct formation of gold nanorods on surfaces using polymer-immobilised gold seeds

• Majid K. Abyaneh,
• Pietro Parisse and
• Loredana Casalis

Beilstein J. Nanotechnol. 2016, 7, 809–816, doi:10.3762/bjnano.7.72

• nanowires (NWs) occurs directly on the surfaces using small metal nanoparticles as seeds to grow the NRs, similar to the direct growth of carbon nanotubes and semiconductor 1D nanostructures from catalytic seeds [5]. Direct growth of GNRs on surfaces has been reported in many publications [6][7][8]. Au seed

Facile synthesis of water-soluble carbon nano-onions under alkaline conditions

• Gaber Hashem Gaber Ahmed,
• Rosana Badía Laíño,
• Josefa Angela García Calzón and
• Marta Elena Díaz García

Beilstein J. Nanotechnol. 2016, 7, 758–766, doi:10.3762/bjnano.7.67

• discharge in presence of metal nanoparticles [17], high-energy laser excitation of ethylene at high temperatures [18] and chemical vapor deposition using catalysts [19]. There are some excellent reviews devoted to C-onions and their chemistry and applications [20][21]. Due to the intricate processes, the

Time-dependent growth of crystalline Au⁰-nanoparticles in cyanobacteria as self-reproducing bioreactors: 2. Anabaena cylindrica

• Liz M. Rösken,
• Felix Cappel,
• Susanne Körsten,
• Christian B. Fischer,
• Andreas Schönleber,
• Sander van Smaalen,
• Stefan Geimer,
• Christian Beresko,
• Georg Ankerhold and
• Stefan Wehner

Beilstein J. Nanotechnol. 2016, 7, 312–327, doi:10.3762/bjnano.7.30

• metal nanoparticles as needed in catalysis has shown its theoretical ability as an extremely environmentally friendly production method in the last few years, even though the separation of the nanoparticles is challenging. Biosynthesis, summing up biosorption and bioreduction of diluted metal ions to

Synthesis and applications of carbon nanomaterials for energy generation and storage

• Marco Notarianni,
• Jinzhang Liu,
• Kristy Vernon and
• Nunzio Motta

Beilstein J. Nanotechnol. 2016, 7, 149–196, doi:10.3762/bjnano.7.17

• flow of a hydrocarbon gas over a catalyst in a tube furnace. The catalyst is typically transition metal nanoparticles on a support such as alumina. Materials grown on the catalyst are collected after cooling the furnace to room temperature. The key process parameters are the hydrocarbon and catalyst

Evaluation of gas-sensing properties of ZnO nanostructures electrochemically doped with Au nanophases

• Elena Dilonardo,
• Michele Penza,
• Marco Alvisi,
• Cinzia Di Franco,
• Francesco Palmisano,
• Luisa Torsi and
• Nicola Cioffi

Beilstein J. Nanotechnol. 2016, 7, 22–31, doi:10.3762/bjnano.7.3

• and time-consuming; furthermore, metal nanoparticles prepared in these way can undergo undesired clustering, thus lowering their catalytic activity [41]. In this contribution, sol–gel pre-synthesized and dried ZnO powder was directly functionalized with Au NPs of controlled size and loading by means

Controlled graphene oxide assembly on silver nanocube monolayers for SERS detection: dependence on nanocube packing procedure

• Martina Banchelli,
• Bruno Tiribilli,
• Roberto Pini,
• Luigi Dei,
• Paolo Matteini and
• Gabriella Caminati

Beilstein J. Nanotechnol. 2016, 7, 9–21, doi:10.3762/bjnano.7.2

• analysis. Keywords: graphene oxide; quartz crystal microbalance; sensing application; SERS; silver nanocubes; Introduction Organized films composed of metal nanoparticles have been extensively studied in recent years owing to their enormous potential in fields as diverse as photoelectrochemistry [1][2

• ], optoelectronics [3], energy-harvesting applications [4], cancer imaging and therapy [5], sensing and biosensing applications [6][7]. In particular, sensors based on arrays of noble metal nanoparticles have become increasingly popular for the ultrasensitive detection of a variety of species ranging from small

• [10][11]. Nanoparticle arrays differing in chemical composition, size, shape and bidimensional morphology have been extensively studied [8][9][12] in the past decades. The existing literature has revealed that not only the shape and size of metal nanoparticles determine their physicochemical and

Chemiresistive/SERS dual sensor based on densely packed gold nanoparticles

• Sanda Boca,
• Cosmin Leordean,
• Simion Astilean and
• Cosmin Farcau

Beilstein J. Nanotechnol. 2015, 6, 2498–2503, doi:10.3762/bjnano.6.259

• type of optical sensor must be able to identify and quantify the investigated analyte, ideally by the use of a low-cost chip made by simple manufacturing procedures. Noble metal nanoparticles (NPs) demonstrated repeatedly their effectiveness as transducing elements in optical sensors based on surface

Self-organization of gold nanoparticles on silanated surfaces

• Htet H. Kyaw,
• Salim H. Al-Harthi,
• Azzouz Sellai and
• Joydeep Dutta

Beilstein J. Nanotechnol. 2015, 6, 2345–2353, doi:10.3762/bjnano.6.242

• Molecular self-assembly or self-organization is a technique which is widely used for the spontaneous arrangement of nanomaterials. Coupling agents such as thiol-terminated, amine-terminated, alkyl-terminated and phenyl-terminated silanes on metal nanoparticles (so called adsorbates) attach on various

• important role to change the surface wetting properties of the glass substrates leading to strong or weak bonding between APTES and metal nanoparticles like Au or Ag [25][26]. Wetting behavior of APTES-functionalized glass substrates Water contact angle (WCA) measurements were performed to study the surface

• the orientation of APTES molecules favoring the attachment of metal nanoparticles as described in Figure 2 (type I, II). However, NH2-terminated silanized glass (Figure 2, type IV) surfaces could lead to large amount of AuNPs attached to the amine groups through electrostatic interaction as shown in

Green synthesis, characterization and catalytic activity of natural bentonite-supported copper nanoparticles for the solvent-free synthesis of 1-substituted 1H-1,2,3,4-tetrazoles and reduction of 4-nitrophenol

• Akbar Rostami-Vartooni,
• Mohammad Alizadeh and
• Mojtaba Bagherzadeh

Beilstein J. Nanotechnol. 2015, 6, 2300–2309, doi:10.3762/bjnano.6.236

• The development of new methodologies for the preparation of heterogeneous catalysts is of great interest in organic synthesis [1]. Metal nanoparticles immobilized on supports such as carbon, zeolites, clay, metal oxides, graphene, etc., have been successfully applied as heterogeneous catalysts due to

Electrochemical behavior of polypyrrol/AuNP composites deposited by different electrochemical methods: sensing properties towards catechol

• Celia García-Hernández,
• Cristina García-Cabezón,
• Cristina Medina-Plaza,
• Fernando Martín-Pedrosa,
• Yolanda Blanco,
• José Antonio de Saja and
• María Luz Rodríguez-Méndez

Beilstein J. Nanotechnol. 2015, 6, 2052–2061, doi:10.3762/bjnano.6.209

• the appropriate selectivity, reproducibility and sensibility towards a particular application. Recently, composite nanomaterials based on conducting polymers and metal nanoparticles (NPs) of different metals have been developed. Gold nanoparticles (AuNPs) have attracted considerable interest because

Distribution of Pd clusters on ultrathin, epitaxial TiO_x films on Pt₃Ti(111)

• Christian Breinlich,
• Maria Buchholz,
• Marco Moors,
• Tobias Pertram,
• Conrad Becker and
• Klaus Wandelt

Beilstein J. Nanotechnol. 2015, 6, 2007–2014, doi:10.3762/bjnano.6.204

• -type superstructure with fewer and shallower defects, making the template effect less discernible. Keywords: cluster growth; palladium; platinum–titanium alloy; scanning tunnelling microscopy (STM); template; titanium oxide; Introduction Catalysts often consist of metal nanoparticles dispersed on an

Synthesis, characterization and in vitro biocompatibility study of Au/TMC/Fe₃O₄ nanocomposites as a promising, nontoxic system for biomedical applications

• Hanieh Shirazi,
• Maryam Daneshpour,
• Soheila Kashanian and
• Kobra Omidfar

Beilstein J. Nanotechnol. 2015, 6, 1677–1689, doi:10.3762/bjnano.6.170

• decade, metal nanoparticles have attracted great scientific attention due to their diversity and wide-spread applications. By controlling the synthesis parameters for the development of metal nanoparticles of appropriate size, shape and structure, their applications can be expanded to various fields such

• as catalysis, electronics, photonics, sensors, microfluidic lateral flow devices, medical diagnosis, and related sciences [6][7][8][9][10]. One of the most important classes of metal nanoparticles are magnetic nanoparticles. Due to their unique properties, such as magnetic resonance momentum, super

In situ SU-8 silver nanocomposites

• Søren V. Fischer,
• Basil Uthuppu and
• Mogens H. Jakobsen

Beilstein J. Nanotechnol. 2015, 6, 1661–1665, doi:10.3762/bjnano.6.168

• Soren V. Fischer Basil Uthuppu Mogens H. Jakobsen DTU Nanotech, Technical University of Denmark, Anker Engelundsvej 1, 2800 Kgs. Lyngby, Denmark 10.3762/bjnano.6.168 Abstract Nanocomposite materials containing metal nanoparticles are of considerable interest in photonics and optoelectronics

• photoresist; in situ synthesis; metal nanoparticles; micro and nanofabrication; nanocomposite; Findings Noble metal nanoparticles (NPs) have been of high interest for many years as their unique properties make them useable in a large variety of applications [1]. The application of these NPs ranges from

• and sensing devices. Metal nanoparticles in photoresists are also interesting within technologies for three-dimensional structuring as these can be used for fabrication of photonic crystals [7]. A good candidate for a polymeric matrix is the epoxy-based photoresist SU-8, which is widely used for