Polydopamine-coated Au nanorods for targeted fluorescent cell imaging and photothermal therapy

• Boris N. Khlebtsov,
• Andrey M. Burov,
• Timofey E. Pylaev and
• Nikolai G. Khlebtsov

Beilstein J. Nanotechnol. 2019, 10, 794–803, doi:10.3762/bjnano.10.79

• tetrachloroaurate trihydrate (HAuCl4·3H2O) and silver nitrate (AgNO3, >99%) were purchased from Alfa Aesar. Ultrapure water obtained from a Milli-Q Integral 5 system was used in all experiments. Synthesis of AuNRs AuNRs with a plasmon peak at around 800 nm were obtained by the seed-mediated growth method [41

Self-assembly and wetting properties of gold nanorod–CTAB molecules on HOPG

• Imtiaz Ahmad,
• Floor Derkink,
• Tim Boulogne,
• Pantelis Bampoulis,
• Harold J. W. Zandvliet,
• Hidayat Ullah Khan,
• Rahim Jan and
• E. Stefan Kooij

Beilstein J. Nanotechnol. 2019, 10, 696–705, doi:10.3762/bjnano.10.69

• conceptual framework used in this work are similar to our work presented elsewhere [9][51]. Materials Hydrogen tetrachloroaurate (HAuCl4·3H2O, 99.999%, Aldrich), silver nitrate (AgNO3, 99%, Acros), ascorbic acid (AA, 99%, Merck), cetyltrimethylammonium bromide (CTAB, Aldrich, 98%), sodium borohydrate (NaBH4

Surface plasmon resonance enhancement of photoluminescence intensity and bioimaging application of gold nanorod@CdSe/ZnS quantum dots

• Siyi Hu,
• Yu Ren,
• Yue Wang,
• Jinhua Li,
• Junle Qu,
• Liwei Liu,
• Hanbin Ma and
• Yuguo Tang

Beilstein J. Nanotechnol. 2019, 10, 22–31, doi:10.3762/bjnano.10.3

• and biophotonics applications. Experimental Materials and instrumentation Hexadecyltrimethylammonium bromide (CTAB, >98.0%), L-ascorbic acid (BioUltra, ≥99.5%), silver nitrate (AgNO3, >99%), gold(III) chloride trihydrate (HAuCl4·3H2O, 99%), 3-mercaptopropionic acid (MPA, ≥99%), N-ethyl-N'-(3

The role of adatoms in chloride-activated colloidal silver nanoparticles for surface-enhanced Raman scattering enhancement

• Nicolae Leopold,
• Andrei Stefancu,
• Krisztian Herman,
• István Sz. Tódor,
• Stefania D. Iancu,
• Vlad Moisoiu and
• Loredana F. Leopold

Beilstein J. Nanotechnol. 2018, 9, 2236–2247, doi:10.3762/bjnano.9.208

• microparticles to AgNPs in the first 10 min of light exposure. Mixing the silver nitrate and sodium chloride in the reacting solution resulted in the generation of a flocculent precipitate of AgCl. The presence of AgCl particles in the solution was evidenced in the UV–vis spectra as an intense absorption band at

• exposure is shown in Figure S2B (using crystal violet as an analyte). The formation of AgNPs from AgCl precursor microparticles can be also followed in the scanning electron microscopy (SEM) micrographs depicted in Figure 3. Figure 3a shows 1–2 μm AgCl particles formed after mixing silver nitrate and

• , the SERS bands of citrate previously reported by us [31][32] during the laser induced synthesis of SERS-active silver spots using silver nitrate-citrate mixtures can easily be explained by the presence of excess of Ag+ in the solution, which induces the chemisorption of citrate onto the metal silver

Fabrication of photothermally active poly(vinyl alcohol) films with gold nanostars for antibacterial applications

• Mykola Borzenkov,
• Maria Moros,
• Claudia Tortiglione,
• Serena Bertoldi,
• Nicola Contessi,
• Silvia Faré,
• Angelo Taglietti,
• Agnese D’Agostino,
• Piersandro Pallavicini,
• Maddalena Collini and
• Giuseppe Chirico

Beilstein J. Nanotechnol. 2018, 9, 2040–2048, doi:10.3762/bjnano.9.193

• ) were commercially available from Fluka. Poly(ethylene glycol) thiols ( = 5000 g/mol; SH-PEG5000–OCH3 and SH-PEG5000–COOH), polyethylene glycol tert-octylphenyl ether (Triton X-100), chloroauric acid, ascorbic acid, silver nitrate, and sodium borohydride were purchased from Sigma-Aldrich and used as

Facile chemical routes to mesoporous silver substrates for SERS analysis

• Elina A. Tastekova,
• Alexander Y. Polyakov,
• Anastasia E. Goldt,
• Alexander V. Sidorov,
• Alexandra A. Oshmyanskaya,
• Irina V. Sukhorukova,
• Dmitry V. Shtansky,
• Wolgang Grünert and
• Anastasia V. Grigorieva

Beilstein J. Nanotechnol. 2018, 9, 880–889, doi:10.3762/bjnano.9.82

• from a 0.1 M silver nitrate solution in the presence of poly(vinyl pyrrolidone) (PVP, Mw ≈40000 kDa). The Ag/PVP molar ratio was varied to optimize the phase composition and micromorphology of the product. The microstructure of the products varied with the molar ratio of the reactants (Figure 1a,b). A

• procedure reported by Lyu et al. [26]. Briefly, 0.05 g of crystalline silver nitrate (Carl Roth GmbH, ≥99%, Ph.Eur., extra pure) was dissolved in 210 mL of 0.2 M ammonium nitrate NH4NO3 aqueous solution. PVP solution was added slowly in the PVP monomeric unit/silver at atomic ratios of 5:1 or 10:1. The

Towards the third dimension in direct electron beam writing of silver

• Katja Höflich,
• Jakub Mateusz Jurczyk,
• Katarzyna Madajska,
• Maximilian Götz,
• Luisa Berger,
• Carlos Guerra-Nuñez,
• Caspar Haverkamp,
• Iwona Szymanska and
• Ivo Utke

Beilstein J. Nanotechnol. 2018, 9, 842–849, doi:10.3762/bjnano.9.78

• of silver 2,2-dimethylbutyrate, carboxylic acid and potassium nitrate were suspended in a water–ethanol solution, heated up to 40 °C and stirred, followed by the addition of silver nitrate. Silver pentafluoropropionate was synthesized by the reaction of fluorinated carboxylic acid and silver

Fabrication and photoactivity of ionic liquid–TiO₂ structures for efficient visible-light-induced photocatalytic decomposition of organic pollutants in aqueous phase

• Anna Gołąbiewska,
• Marta Paszkiewicz-Gawron,
• Aleksandra Sadzińska,
• Wojciech Lisowski,
• Ewelina Grabowska,
• Adriana Zaleska-Medynska and
• Justyna Łuczak

Beilstein J. Nanotechnol. 2018, 9, 580–590, doi:10.3762/bjnano.9.54

• -tetradecylimidazolium chloride [TDMIM][Cl] were purchased from Ionic Liquids Technologies GmbH. Ammonium oxalate, silver nitrate (≥99%), benzoquinone and tert-butyl alcohol from Sigma-Aldrich were used as scavengers. Photocatalyst preparation TiO2 was modified by ILs using a solvothermal method. First of all, the

Colloidal solution of silver nanoparticles for label-free colorimetric sensing of ammonia in aqueous solutions

• Alessandro Buccolieri,
• Antonio Serra,
• Gabriele Giancane and
• Daniela Manno

Beilstein J. Nanotechnol. 2018, 9, 499–507, doi:10.3762/bjnano.9.48

• concentration range of 0.5–200 ppm. Finally, the silver ions run out and the rate of nucleation goes into saturation. Experimental Materials Silver nitrate (AgNO3, 99%), α-D-glucose (C6H12C6, 99.99%), sucralose (C12H19Cl3O8, 98%) and ammonia (30% solution) were purchased from Sigma-Aldrich and used without

Influence of the preparation method on the photocatalytic activity of Nd-modified TiO₂

• Patrycja Parnicka,
• Paweł Mazierski,
• Tomasz Grzyb,
• Wojciech Lisowski,
• Ewa Kowalska,
• Bunsho Ohtani,
• Adriana Zaleska-Medynska and
• Joanna Nadolna

Beilstein J. Nanotechnol. 2018, 9, 447–459, doi:10.3762/bjnano.9.43

• different scavengers (Figure 10). Silver nitrate was used as electron scavenger, ammonium oxalate as hole scavenger, benzoquinone for O2•− and tert-butanol for •OH radicals. After 60 min of visible light irradiation in the presence of SHT photocatalyst, the degradation rate declined from 0.31 to 0.30

• μmol·dm−1·min−1 due to addition of ammonium oxalate and tert-butanol (Table 4). While, after the addition of silver nitrate and benzoquinone, the degradation rate decreased from 0.31 to 0.12 and 0.22 μmol·dm−1·min−1, respectively, suggesting that photogenerated electrons and superoxide radicals are the

• , respectively) compared to the system without scavengers (0.62 μmol·dm−1·min−1), suggesting a limited role played by holes in the photocatalytic process. The addition of silver nitrate and benzoquinone significantly reduced the phenol degradation rate (from 0.62 to 0.15 and 0.21 μmol·dm−1·min−1, respectively

Dielectric properties of a bisimidazolium salt with dodecyl sulfate anion doped with carbon nanotubes

• Doina Manaila Maximean,
• Viorel Cîrcu and
• Constantin Paul Ganea

Beilstein J. Nanotechnol. 2018, 9, 164–174, doi:10.3762/bjnano.9.19

• dropwise to a solution of compound 2 (2 g, 3.0 mmol) in dichloromethane (50 mL). The mixture was stirred at room temperature for 1 h after which 100 mL of deionised water was added. The organic layer was separated and washed repeatedly with water until no reaction with silver nitrate for Br− was noticed

Facile synthesis of silver/silver thiocyanate (Ag@AgSCN) plasmonic nanostructures with enhanced photocatalytic performance

• Xinfu Zhao,
• Dairong Chen,
• Abdul Qayum,
• Bo Chen and
• Xiuling Jiao

Beilstein J. Nanotechnol. 2017, 8, 2781–2789, doi:10.3762/bjnano.8.277

• stability compared to the previously reported silver halogen plasma catalyst, which make it more suitable for practical application. Experimental Chemicals Silver nitrate (AgNO3, Shanghai Chemical Co.) and ammonium thiocyanate (NH4SCN, Tianjin Reagent Co.) were used as precursors for the synthesis of silver

The role of ligands in coinage-metal nanoparticles for electronics

• Ioannis Kanelidis and
• Tobias Kraus

Beilstein J. Nanotechnol. 2017, 8, 2625–2639, doi:10.3762/bjnano.8.263

• silver nitrate in the presence of poly(vinylpyrrolidone) (PVP, Figure 2) and sodium bromide. The nanobars formed when bromide ions etched the multiply twinned seeds, promoted the formation of single crystal seeds, and initiated anisotropic growth [68]. Longer silver nanowires grew from multiply twinned

• nanoparticles by the reduction of silver nitrate in the presence of PVP. The twin boundaries served as active sites for the addition of silver atoms as the strong interaction between PVP and the sides of the initially formed nanorod allowed preferential diffusion of the silver atoms to the ends of the nanorods

Synthesis and characterization of noble metal–titania core–shell nanostructures with tunable shell thickness

• Bartosz Bartosewicz,
• Marta Michalska-Domańska,
• Malwina Liszewska,
• Dariusz Zasada and
• Bartłomiej J. Jankiewicz

Beilstein J. Nanotechnol. 2017, 8, 2083–2093, doi:10.3762/bjnano.8.208

• the reduction of silver nitrate with hydroxylamine hydrochloride [50][51]. In both cases, relatively monodisperse spherical or quasi-spherical metal NPs with a mean particle diameter of around 100 nm were obtained (Table 1, Figure 1 and Figure S1, Supporting Information File 1). Initially, we also

• /w aq. soln.) and silver nitrate (99.9%) were purchased from Alfa Aesar. Ethanol (99.8%) and acetonitrile (99.5%) were purchased from Avantor Performance Materials Poland. Nitric acid (65% w/w aq. soln.), hydrofluoric acid (40% w/w aq. soln.) and sodium hydroxide (>99%) were purchased from Chempur

• aqueous solution of silver nitrate (1.1 mM) were stirred at room temperature. 10 mL of solution containing hydroxylamine hydrochloride (25 mM) and sodium hydroxide (0.1 w/w %) were added. The reaction was completed within a few seconds, which was indicated by a change of solution color to milky yellow. In

Surface-enhanced Raman spectroscopy of cell lysates mixed with silver nanoparticles for tumor classification

• Mohamed Hassoun,
• Iwan W.Schie,
• Tatiana Tolstik,
• Sarmiza E. Stanca,
• Christoph Krafft and
• Juergen Popp

Beilstein J. Nanotechnol. 2017, 8, 1183–1190, doi:10.3762/bjnano.8.120

• all approaches mentioned above: generation of droplets with single cells in a microfluidic chip, addition of cell lysis buffer, nanoparticles and activation salt, mixing of all solvents and collection of SERS spectra for classification. Experimental Nanoparticle preparation Silver nitrate (ACS reagent

• mM silver nitrate was added to a solution of 1.5 mM hydroxylamine hydrochloride and 3 mM sodium hydroxide. The whole mixture was stirred during the addition of the silver nitrate. As a sign of a successful preparation the color of the solution changed from grey to yellow. The silver colloids were

Selective detection of Mg²⁺ ions via enhanced fluorescence emission using Au–DNA nanocomposites

• Tanushree Basu,
• Khyati Rana,
• Niranjan Das and
• Bonamali Pal

Beilstein J. Nanotechnol. 2017, 8, 762–771, doi:10.3762/bjnano.8.79

• bromide (CTAB) and DL-dithiothreitol solution (DTT) were purchased from Sigma Aldrich. Sodium borohydride (NaBH4) and silver nitrate (AgNO3) were purchased from Rankem and Fisher Scientific, respectively. Chloroauric acid (HAuCl4·H2O), ascorbic acid, mercaptopropionic acid (MPA) and magnesium acetate (Mg

α-((4-Cyanobenzoyl)oxy)-ω-methyl poly(ethylene glycol): a new stabilizer for silver nanoparticles

• Jana Lutze,
• Miguel A. Bañares,
• Marcos Pita,
• Andrea Haase,
• Andreas Luch and
• Andreas Taubert

Beilstein J. Nanotechnol. 2017, 8, 627–635, doi:10.3762/bjnano.8.67

• -ascorbic acid (≥99%, Roth), N,N’-dicyclohexylcarbodiimide (99%, Aldrich), poly(ethylene glycol) methyl ether (Mn = 4830 g·mol−1, Aldrich), silver nitrate (≥99%, Sigma-Aldrich), sodium hydroxide (>99%, Roth), and trisodium citrate dihydrate (99.7%, Merck) were used as received. Water with a resistivity of

• 0.5 M sodium hydroxide solution. The mixture was heated to 30 °C and a silver nitrate solution (0.1 M, 80 µL, 8.0 µmol) was added under vigorous stirring. After ten minutes stirring at room temperature the mixture was refluxed for two hours, resulting in an orange dispersion, which was allowed to cool

Comparison of four methods for the biofunctionalization of gold nanorods by the introduction of sulfhydryl groups to antibodies

• Xuefeng Wang,
• Zhong Mei,
• Yanyan Wang and
• Liang Tang

Beilstein J. Nanotechnol. 2017, 8, 372–380, doi:10.3762/bjnano.8.39

• trihydrate (HAuCl4·3H2O; 99%), cetyltrimethylammonium bromide (CTAB), sodium borohydride (NaBH4; 99%), silver nitrate (AgNO3; 99%), L-ascorbic acid (AA), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimidehydrochloride (EDC), sodium oleate (NaOL; >97%), hydrochloric acid (HCl, 37%), (3-mercaptopropyl

Microfluidic setup for on-line SERS monitoring using laser induced nanoparticle spots as SERS active substrate

• Oana-M. Buja,
• Ovidiu D. Gordan,
• Nicolae Leopold,
• Andreas Morschhauser,
• Jörg Nestler and
• Dietrich R. T. Zahn

Beilstein J. Nanotechnol. 2017, 8, 237–243, doi:10.3762/bjnano.8.26

• continuous flow of a mixture of silver nitrate or gold chloride and sodium citrate. The described microfluidic setup enables within a few minutes the monitoring of several processes: the synthesis of the SERS active spot, MG adsorption to the metal surface, detection of the analyte when saturation of the

• detection of the analyte, as shown schematically in Figure 1a. SERS monitoring of MG adsorbed on silver nanoparticle spots The synthesis of the SERS active silver nanoparticles spot was carried out by laser-induced spot synthesis [24] inside the glass capillary. The silver nitrate and sodium citrate

• beam (λ = 514.7 nm) on 5 μL of silver/citrate mixture for 60 s. The scanning electron microscopy (SEM) image was obtained with a FEI NovaNanoSEM 200 scanning electron microscope with a working distance of 5.9 mm. The following chemical reagents were used: silver nitrate (Alfa Aesar), hydrogen

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

• procedure (synthesis b) for the synthesis of the AgNPs. In this case, the molar ratio between silver nitrate, sodium borohydride and 3-MPS was varied. The reaction was conducted at 3 °C and the final purification was avoided in order to prevent possible aggregation with a consequent broadening of the SPR

• the development of an analytical sensor system based on optical methods to detect metal ions in actual water samples. Experimental Materials and sample preparation Silver nitrate (AgNO3, Sigma-Aldrich, 99.5%), sodium borohydride (NaBH4, Sigma-Aldrich, 98%) and 3-mercapto-1-propanesulfonic acid sodium

• water several times (10 min, 15 000 rpm). Synthesis b: sodium borohydride and silver nitrate solution (in deionized water) was mixed with concentration ratio NaBH4/AgNO3 2:1. The NaBH4 solution was cooled to 3 °C under vigorous stirring, then the AgNO3 solution was added dropwise at approximately one

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

• silver nitrate solution (10−3 M concentration from 99.9% pure AgNO3, Sigma-Aldrich Denmark A/S). After 20 h of incubation at room temperature and in darkness, the pieces were removed, rinsed with tap water and placed on a glass slide to dry for several hours, also in darkness. After drying, the samples

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

• produces a large fraction of particle clusters with small interparticle distance, which generates an efficient hot spot distribution. Experimental Materials. Ethylene Glycol (EG, ≥99%) was obtained from Scharlab. Sodium sulfide nonahydrate, PVP (Mw = 55000), silver nitrate and GO solution (4 mg mL−1) were

• . Then, 0.175 mL of a 0.72 mg mL−1 sodium sulfide solution and 3.75 mL of a 20 mg mL−1 PVP solution in EG were subsequently added to the flask. The flask was thermostated for additional 10 min, until a temperature of 150 °C was again established. A silver nitrate solution (1.25 mL) in EG with a

Ultrastructural changes in methicillin-resistant Staphylococcus aureus induced by positively charged silver nanoparticles

• Dulce G. Romero-Urbina,
• Humberto H. Lara,
• J. Jesús Velázquez-Salazar,
• M. Josefina Arellano-Jiménez,
• Eduardo Larios,
• Anand Srinivasan,
• Jose L. Lopez-Ribot and
• Miguel José Yacamán

Beilstein J. Nanotechnol. 2015, 6, 2396–2405, doi:10.3762/bjnano.6.246

• widely known. Around the 1800s silver nitrate was commonly applied topically to treat burns and ulcerations or infected wounds, although its use declined following the introduction of antibiotics. Fox revived its use in the form of silver sulfadiazine, which is applied topically in burn therapy [23]. An

• + ion leaching. Therefore, the combination of all three species is more efficient in binding and lysing bacteria. Experimental Chemicals and Materials: Silver nitrate, AgNO3 (99.99%), was purchased from Sigma-Aldrich and used as received. Distilled water was purified using Whatman® 0.2 µm filters. A

• film for further analysis. The use of microwaves to synthesize silver nanoparticles has been shown to work in the presence of an eco-friendly reducing agent [54]. Silver nitrate can decompose into metallic silver, NO2 gas and O2 by the addition of heat as represented in Equation 1 [55]: In our study

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

• the composite matrix. At higher precursor concentrations, larger agglomerated NPs are dominant and large islands of phase separated Ag are formed in the composite. Experimental Preparation of Ag NPs in cyclopentanone Materials Silver nitrate (AgNO3, ≥99.0%) and sodium borohydride (NaBH4, ≥98.0%) was

• bought from Sigma-Aldrich. Luviskol® VA 64, a poly(vinylpyrrolidone-co-vinyl acetate) (PVP/VA) mixture was kindly gifted by BASF. Method 1 g of PVP/VA and 0.1 g of silver nitrate is dissolved in 50 mL of absolute ethanol. 0.02 g of sodium borohydride and 0.2 g of PVP/VA dissolved in 10 mL of absolute

Formation of substrate-based gold nanocage chains through dealloying with nitric acid

• Ziren Yan,
• Ying Wu and
• Junwei Di

Beilstein J. Nanotechnol. 2015, 6, 1362–1368, doi:10.3762/bjnano.6.140

• Suzhou NSG Electronics Co. Ltd. (Suzhou, China). Prior to use, it was divided into the strips (50 × 6 mm). All chemicals were of analytical grade and used as received without any further purification. Silver nitrate (AgNO3), hydrogen tetrachloroaurate (HAuCl4), nitric acid (HNO3), hydrogen peroxide (H2O2