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

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

• replaced with the thiolated polyethylene glycol (PEG-SH) as the latter molecules interact more strongly with the Au surface. Without this intermediate procedure, the adsorption of dopamine on CTAB-stabilized AuNRs resulted in nanoparticle aggregation. The formation of the PDA coating can be easily induced

• -PDA-folate nanoparticles For a comparative study, PEG-coated AuNR-PDA was used instead of folate-conjugated nanorods. To this end, 100 µL of 1 mM PEG-SH was added to 10 mL AuNR-PDA suspensions. To remove unbound components, the suspension was then centrifuged at 12000g for 10 min, the supernatant was

Colloidal chemistry with patchy silica nanoparticles

• Pierre-Etienne Rouet,
• Cyril Chomette,
• Laurent Adumeau,
• Etienne Duguet and
• Serge Ravaine

Beilstein J. Nanotechnol. 2018, 9, 2989–2998, doi:10.3762/bjnano.9.278

• ]-O′-methylpoly(ethylene glycol) (PEG-SH, Mw = 5000) as we received them. We systematically used ultrapure water at 25 °C obtained from a Milli-Q system (Millipore). We purchased tetrahydrofuran (THF), dimethylformamide (DMF) from Sigma-Aldrich and chloroform and absolute ethanol from VWR Chemicals

• by the citrate-reduction method reported by Turkevich [29]. SiO2 coating was carried out after surface functionalization of the gold nanoparticles by using a PEG-SH (Mw = 5000) aqueous solution in a similar manner as described in [23]. The surface modification allowed for the replacement of the

• citrate molecules adsorbed onto the gold surface by PEG-SH. A ratio of four PEG molecules per square nanometer of available surface of the gold sol was fixed. The aqueous solution of PEG-SH was freshly prepared and added dropwise to the as-prepared gold nanoparticles under vigorous magnetic stirring. The

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

• elimination of unbound PEG-SH and surfactant. After the ultracentrifugation step, GNSs were redissolved in 1 mL of Milli-Q water to increase the concentration of nanoparticles. The coating with SH-PEG–COOH ( = 5000 g/mol) was performed in the same way and the pH of the final solution was adjusted to ≈8

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

• higher conductivities than films filled with spheres. Both rods and spheres were capped with PEG-SH (Figure 2), a non-conductive ligand that was chosen because ethylene glycol (EG) is miscible with aqueous PEDOT:PSS solutions and the addition of EG to pure PEDOT:PSS films increases the electrical

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

• bonds. These methods involved the introduction of sulfhydryl (-SH) groups to anti-human IgG to directly combine with the GNRs in an easy manner. Figure 1 shows a schematic of antibodies anchored onto GNR surfaces by thiolation. The functionalized GNRs were blocked by PEG-SH and washed with 0.01 M PBS

• )trimethoxysilane (MPTMS), ethylenediaminetetraacetic acid (EDTA), poly(ethylene glycol) methyl ether thiol (PEG-SH, Mw ≈ 5000), goat anti-human IgG, dithiotreitol (DTT), thiol-poly(ethylene glycol)amine (SH-PEG-NH2), and human serum IgG were provided by Sigma–Aldrich (St. Louis, MO). Traut’s reagent, ZebaTM spin

• of GNRs with thiolated anti-IgG was performed as previously described [18]. Briefly, 50 μL of various thiolated anti-IgG (10 μg/mL) was added dropwise to 1 mL of GNR solution. Methoxy-PEG-SH (PEG-SH, 150 μM) was added drop by drop to the colloidal solution after 5 min of GNRs and anti-IgG incubation

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

• this factor is studied in this letter. Therefore, GNS with well-controlled structure and with LSPR centred at about 760 nm were synthesized, decorated with poly(ethylene glycol) thiol (PEG-SH) [18], and inkjet-printed onto three differently coated paper substrates at various drop density values (δ

• aqueous PEGylated GNS solution (70 vol %) in order to adjust suitable viscosity and surface tension for inkjet printing (1.92 cP and 40 mN/m, respectively) as reported previously [27][28]. Notably, GNS decorated with PEG-SH become soluble in a variety of solvents, from water to hydrophobic ones, due to

• the amphiphilic nature of the poly(ethylene glycol) chains [18]. PEG-SH decoration causes LSPR of GNS to red-shift by about 10 nm, because of the slight local increase in the refractive index related to thiols grafting on the gold surface [18]. GNS decorated with PEG-SH are stable even after repeated

Mechanical properties of MDCK II cells exposed to gold nanorods

• Anna Pietuch,
• Bastian Rouven Brückner,
• David Schneider,
• Marco Tarantola,
• Christina Rosman,
• Carsten Sönnichsen and
• Andreas Janshoff

Beilstein J. Nanotechnol. 2015, 6, 223–231, doi:10.3762/bjnano.6.21

• of gold nanorods were obtained from UV–vis spectroscopy using their optical extinction value at 400 nm and a molar extinction coefficient of 1.1 × 109 Lmol−1cm−1 assuming the aforementioned particle size found by TEM. In order to replace the CTAB, functionalized polyethylene glycol thiols (X-PEG-SH

• ; X = COOH, NH2, CH3O, MW: 5,000 g/mol) were self-assembled on the gold surface. Nanoparticle pellets were incubated overnight with 100 μL of an aqueous 2 mM solution containing 75% NH2-PEG-SH and 25% CH3O-PEG-SH (NH2-PEG-particles) or 75% COOH-PEG-SH and 25% CH3O-PEG-SH (COOH-PEG-particles

Mammalian cell growth on gold nanoparticle-decorated substrates is influenced by the nanoparticle coating

• Christina Rosman,
• Sebastien Pierrat,
• Marco Tarantola,
• David Schneider,
• Eva Sunnick,
• Andreas Janshoff and
• Carsten Sönnichsen

Beilstein J. Nanotechnol. 2014, 5, 2479–2488, doi:10.3762/bjnano.5.257

• functionalized poly(ethylene glycol) thiols (X–PEG–SH, where X = COOH, NH2, CH3O; MW = 5000 Da) were grafted onto the gold surface [36] in the same manner as [20]. For this purpose, we incubated the nanoparticle pellet overnight with 100 µL of an aqueous 2 mM mixture of 75% NH2–PEG–SH and 25% CH3O–PEG–SH (NH2

• –PEG particles) or 75% COOH–PEG–SH and 25% CH3O–PEG–SH (COOH–PEG particles), respectively. The next day, excess PEG was removed by centrifugation. The success of the PEGylation was tested by gel electrophoresis, which also reveals the surface charge of the particles (Supporting Information of [20

In vitro toxicity and bioimaging studies of gold nanorods formulations coated with biofunctional thiol-PEG molecules and Pluronic block copolymers

• Tianxun Gong,
• Douglas Goh,
• Malini Olivo and
• Ken-Tye Yong

Beilstein J. Nanotechnol. 2014, 5, 546–553, doi:10.3762/bjnano.5.64

• clinical applications such as the long term imaging of cells and tissues. Keywords: cancer cells; dark-field imaging; gold nanorods; PEG-SH; PEO–PPO–PEO; Introduction Gold nanorods (AuNRs) have been widely adopted for biological applications due to their unique plasmonic properties. One of the most

• functional thiol-poly(ethylene glycol) (PEG-SH) molecules and Pluronic block copolymers (PEO–PPO–PEO) (see chemical formula of PEG-SH and Pluronic (PEO–PPO–PEO) in Supporting Information File 1, Figure S1) are commonly used to prepare non-ionic polymer encapsulated AuNRs with a stealth property for in vivo

• studies [20][21][22][23]. It is noteworthy that these PEG polymers can even be modified with additional functional groups such as a carboxyl and an amino group for the conjugation of targeting ligands. It is known that the CTAB bilayers on a AuNRs surface can be removed and replaced with PEG-SH molecules