Atomic-level characterization and cilostazol affinity of poly(lactic acid) nanoparticles conjugated with differentially charged hydrophilic molecules

• María Francisca Matus,
• Martín Ludueña,
• Cristian Vilos,
• Iván Palomo and
• Marcelo M. Mariscal

Beilstein J. Nanotechnol. 2018, 9, 1328–1338, doi:10.3762/bjnano.9.126

• the center of the system. 10 DSPE–PEG configurations were put randomly around the PLA core with the polar head (P atom of phosphate group) of these lipids facing the PLA core while the hydrophilic end (terminal group) of the lipids faced outwards. The P atom, representing the polar head, was

Surface characterization of nanoparticles using near-field light scattering

• Eunsoo Yoo,
• Yizhong Liu,
• Chukwuazam A. Nwasike,
• Sebastian R. Freeman,
• Brian C. DiPaolo,
• Bernardo Cordovez and
• Amber L. Doiron

Beilstein J. Nanotechnol. 2018, 9, 1228–1238, doi:10.3762/bjnano.9.114

• purchased from Alfa Aesar (Heysham, UK). Sodium phosphate monobasic and dibasic were purchased from Amresco (Solon, OH, USA). Tribenzyloxybenzoic acid (TBBA) was purchased from Tokyo Chemical Industry. N2 purged deionized (DI) water was used throughout the entire experiment. All chemicals used were of

• magnetic decantation; the supernatant was decanted. The solution was washed three times with DI water to remove excess polymer. PEG-SPIOs (1 mg/mL in water) and polygallol (1 mg/mL) were vortexed in a 1:1 volume ratio for 1 h. Finally, 1 M of pH 7.2 phosphate buffer solution was added into the mixture in a

Review on nanoparticles and nanostructured materials: history, sources, toxicity and regulations

• Jaison Jeevanandam,
• Ahmed Barhoum,
• Yen S. Chan,
• Alain Dufresne and
• Michael K. Danquah

Beilstein J. Nanotechnol. 2018, 9, 1050–1074, doi:10.3762/bjnano.9.98

Heavy-metal detectors based on modified ferrite nanoparticles

• Urszula Klekotka,
• Ewelina Wińska,
• Elżbieta Zambrzycka-Szelewa,
• Dariusz Satuła and
• Beata Kalska-Szostko

Beilstein J. Nanotechnol. 2018, 9, 762–770, doi:10.3762/bjnano.9.69

• ). CoCl2 (anhydrous), tetrabutylammonium hydroxide (TBAOH) (40% in water), phthalic anhydride (PA), 3-phosphonopropionic acid (3-PPA), 16-phosphonohexadecanoic acid (16-PHDA) and phosphate-buffered saline (PBS) were received from Sigma-Aldrich. Apparatus The structure and morphology of nanoparticles used

Green synthesis of fluorescent carbon dots from spices for in vitro imaging and tumour cell growth inhibition

• Nagamalai Vasimalai,
• Vânia Vilas-Boas,
• Juan Gallo,
• María de Fátima Cerqueira,
• Mario Menéndez-Miranda,
• José Manuel Costa-Fernández,
• Lorena Diéguez,
• Begoña Espiña and
• María Teresa Fernández-Argüelles

Beilstein J. Nanotechnol. 2018, 9, 530–544, doi:10.3762/bjnano.9.51

• , antibiotic mixture of penicillin/streptomycin (10,000 U·mL−1/10,000 μg·mL−1), fungizone (250 μg·mL−1), human transferrin (4 mg·mL−1) and phosphate buffered saline solution (1× PBS) were obtained from GIBCO Invitrogen (Barcelona, Spain). Fetal bovine serum (FBS) was obtained from HyClone GE Healthcare (United

Wafer-scale bioactive substrate patterning by chemical lift-off lithography

• Chong-You Chen,
• Chang-Ming Wang,
• Hsiang-Hua Li,
• Hong-Hseng Chan and
• Wei-Ssu Liao

Beilstein J. Nanotechnol. 2018, 9, 311–320, doi:10.3762/bjnano.9.31

• (TRIS) and tris(2-carboxyethyl)phosphine (TCEP) were obtained from Acros Organics (Geel, Belgium). Bovine serum albumin (BSA), and 10× phosphate buffered saline (PBS) containing 1.37 M NaCl, 0.027 M KCl, 0.10 M Na2HPO4, and 0.018 M KH2PO4 were purchased from Bioman Scientific Co., Ltd (Taipei, Taiwan

Bombyx mori silk/titania/gold hybrid materials for photocatalytic water splitting: combining renewable raw materials with clean fuels

• Stefanie Krüger,
• Michael Schwarze,
• Otto Baumann,
• Christina Günter,
• Michael Bruns,
• Christian Kübel,
• Dorothée Vinga Szabó,
• Rafael Meinusch,
• Verónica de Zea Bermudez and
• Andreas Taubert

Beilstein J. Nanotechnol. 2018, 9, 187–204, doi:10.3762/bjnano.9.21

• Mw = 4600 g/mol, Sigma-Aldrich, measured Mw = 780 g/mol), PEO8300, (nominal Mw = 600 g/mol, abcr, measured Mw = 8300 g/mol), sodium carbonate (Na2CO3, 99.8%, Carl Roth), titanium isopropoxide (Ti(OiPr)4, TTIP, 98%, abcr), disodium hydrogen phosphate (Na2HPO4, ACS reagent, Sigma-Aldrich), magnesium

• sulfate (MgSO4, AnalaR Normapure, VWR), sodium phosphate monobasic (NaH2PO4, ACS reagent, Sigma Aldrich), uranyl acetate (p.a., Merck), ethanol absolute (EtOHabs, ≥99.8%, Carl Roth), acetone (≥99.8%, Carl Roth), AGAR Low Viscosity Resin (Plano), and PLANOCARBON (Plano) were used as received. Water-free

• washed three times with 50 mL of water at room temperature. Characterization Samples for all transmission electron microscopy (TEM) investigations were prepared as follows: small pieces (ca. 2 mm2) of the wet hybrid materials were immersed in a 3% glutaraldehyde solution in 0.1 M phosphate buffer (pH 7

Review on optofluidic microreactors for artificial photosynthesis

• Xiaowen Huang,
• Jianchun Wang,
• Tenghao Li,
• Jianmei Wang,
• Min Xu,
• Weixing Yu,
• Abdel El Abed and
• Xuming Zhang

Beilstein J. Nanotechnol. 2018, 9, 30–41, doi:10.3762/bjnano.9.5

• the famous Calvin cycle, in which the coenzymes – nicotinamide adenine dinucleotide hydride (NADH) and nicotinamide adenine dinucleotide phosphate hydride (NADPH) – play an important role since they work as the reducing power for the biosynthetic reactions. Despite its advantages, NPS still has a very

Patterning of supported gold monolayers via chemical lift-off lithography

• Liane S. Slaughter,
• Kevin M. Cheung,
• Sami Kaappa,
• Huan H. Cao,
• Qing Yang,
• Thomas D. Young,
• Andrew C. Serino,
• Sami Malola,
• Jana M. Olson,
• Stephan Link,
• Hannu Häkkinen,
• Anne M. Andrews and
• Paul S. Weiss

Beilstein J. Nanotechnol. 2017, 8, 2648–2661, doi:10.3762/bjnano.8.265

• solutions. Immediately prior to experiments, the DNA stock solutions were diluted 1:100 with 1× phosphate buffered saline (PBS) ([NaCl] = 138 mM, [KCl] = 2.7 mM, and [MgCl2] = 5 mM) pH 7.4 (Sigma-Aldrich, St. Louis, MO, USA) to make 1 µM solutions. The patterns of Au–alkanethiolate monolayers on flat PDMS

Laser-assisted fabrication of gold nanoparticle-composed structures embedded in borosilicate glass

• Nikolay Nedyalkov,
• Mihaela Koleva,
• Nadya Stankova,
• Rosen Nikov,
• Mitsuhiro Terakawa,
• Yasutaka Nakajima,
• Lyubomir Aleksandrov and
• Reni Iordanova

Beilstein J. Nanotechnol. 2017, 8, 2454–2463, doi:10.3762/bjnano.8.244

• ., silicate, phosphate and borate glasses, titanium and aluminum oxides, and polymers) are processed by laser radiation with appropriate parameters. Metal nanoparticles are formed within the irradiated area after a subsequent thermal annealing. This photoreduction process has been achieved by using CW lasers

Strategy to discover full-length amyloid-beta peptide ligands using high-efficiency microarray technology

• Clelia Galati,
• Natalia Spinella,
• Lucio Renna,
• Danilo Milardi,
• Francesco Attanasio,
• Michele Francesco Maria Sciacca and
• Corrado Bongiorno

Beilstein J. Nanotechnol. 2017, 8, 2446–2453, doi:10.3762/bjnano.8.243

• peptides only very weak signals (Figure S2A, Supporting Information File 1) were detected, deriving from the light scattering of salts contained in the phosphate buffer used to prepare the peptide spotting solution, and no bright spots were detected after the blocking step (Figure S2B, Supporting

• our laboratory. Experimental Chemicals Phosphate-buffered saline, hydrogen peroxide (29%), ammonium hydroxide (25%), hydrochloric acid (37%), methanol, dimethyl sulfoxide (DMSO), anhydrous toluene and 3-glycidyloxypropyltrimethoxysilane (GOPs) were acquired from Sigma-Aldrich. Bovine serum albumin

• 37 °C for 1 h. HFIP was removed by gentle streaming of argon, the peptide film was dissolved again in 1 mL HFIP, loaded on the plate and frozen at −30 °C for 5 h, then lyophilized overnight. The lyophilized samples on the plate were then dissolved in 10 mM phosphate buffer pH 7.2 to a concentration

Involvement of two uptake mechanisms of gold and iron oxide nanoparticles in a co-exposure scenario using mouse macrophages

• Dimitri Vanhecke,
• Dagmar A. Kuhn,
• Dorleta Jimenez de Aberasturi,
• Sandor Balog,
• Ana Milosevic,
• Dominic Urban,
• Diana Peckys,
• Niels de Jonge,
• Wolfgang J. Parak,
• Alke Petri-Fink and
• Barbara Rothen-Rutishauser

Beilstein J. Nanotechnol. 2017, 8, 2396–2409, doi:10.3762/bjnano.8.239

• , ethanol, and deionized water, phosphate-buffered saline (PBS) at a 10× solution, electron microscopy grade glutaraldehyde (GA) 25% solution, D-saccharose, glycine, biotin-free and molecular biology grade albumin fraction V (BSA), and sodium cacodylate trihydrate were obtained from Carl Roth GmbH + Co. KG

• , Sigma-Aldrich) was used to inhibit phagocytosis and micropinocytosis. Cell fixation and labelling for laser scanning microscopy (LSM) To label the proteins involved in endocytotic uptake, the cells were fixed with 4% paraformaldehyde (PFA, Sigma-Aldrich, Switzerland) in phosphate-buffered saline (PBS

• × phosphate-buffered saline (PBS). After 1 h of staining (in the dark at RT) and three washing cycles with 1× PBS the cells were mounted using Glycergel mounting media (C0563, Dako, Baar, Switzerland). For live-cell imaging, cells were seeded in a Lab-TekTM II chambered cover glass four-well chamber (1.5

Photobleaching of YOYO-1 in super-resolution single DNA fluorescence imaging

• Joseph R. Pyle and
• Jixin Chen

Beilstein J. Nanotechnol. 2017, 8, 2296–2306, doi:10.3762/bjnano.8.229

• attraction between the negatively charged phosphate groups in the DNA backbone and the positively charged amine groups on the surface. The DNA molecules were stretched by flow through the channel. The channel was then washed with buffer solution to remove the non-immobilized YOYO–DNA. Single DNA intensity

Fabrication of carbon nanospheres by the pyrolysis of polyacrylonitrile–poly(methyl methacrylate) core–shell composite nanoparticles

• Dafu Wei,
• Youwei Zhang and
• Jinping Fu

Beilstein J. Nanotechnol. 2017, 8, 1897–1908, doi:10.3762/bjnano.8.190

• adhesion between the carbon nanoparticles. As a result, an agglomerated carbon bulk instead of discrete carbon nanoparticles was obtained [33][34]. To solve this problem, Wu et al. [33] coated a protective layer of inorganic salt, titanium phosphate (TP), on the surfaces of the PAN nanoparticles. The

• of the nanoparticle dispersion and phosphate tungsic acid (PTA) aqueous solution (5 wt %) for 1 day. The PAN-PMMA1 nanoparticles were also treated by 50% NaSCN aqueous solution, a selective solvent for PAN. 75 μL of PAN-PMMA1 nanoparticle aqueous dispersion was added into 10 mL of 50% NaSCN aqueous

• adjusting the feeding monomer ratio. TEM images The TEM micrographs of the PAN nanoparticles and the two PAN–PMMA nanoparticles are displayed in Figure 4. As disclosed by Figure 4a, the staining agent phosphate tungsic acid (PTA) molecules could diffuse into and interact with the PAN nanoparticles. Thus

Carbon nano-onions as fluorescent on/off modulated nanoprobes for diagnostics

• Stefania Lettieri,
• Marta d’Amora,
• Adalberto Camisasca,
• Alberto Diaspro and
• Silvia Giordani

Beilstein J. Nanotechnol. 2017, 8, 1878–1888, doi:10.3762/bjnano.8.188

• with 5% CO2. Cells were incubated with 20 μg mL−1 of fluo-CNOs for 2, 5, 12, 24 and 48 h. As a control, the cells were left untreated (data not shown). After incubation, the cells were rinsed three times with phosphate buffered saline (PBS) (0.1 M, pH 7.4), fixed in a combination of paraformaldehyde (3

• emission maximum (λem). Effective hydrodynamic diameter (0.01 M PBS) obtained from dynamic light scattering (DLS) measurements and zeta potential (phosphate buffer) of oxi-CNOs and fluo-CNOs at a concentration of 5 µg mL−1 in PBS. Supporting Information Supporting Information File 82: Additional

Uptake and intracellular accumulation of diamond nanoparticles – a metabolic and cytotoxic study

• Antonín Brož,
• Lucie Bačáková,
• Pavla Štenclová,
• Alexander Kromka and
• Štěpán Potocký

Beilstein J. Nanotechnol. 2017, 8, 1649–1657, doi:10.3762/bjnano.8.165

• samples were then washed with phosphate buffered saline and were fixed with 4% paraformaldehyde for 10 min. The nuclei of the fixed cells were then stained using Hoechst 33258 dye for cell counting. Micrographs of the stained nuclei were acquired using an IX71 microscope (Olympus, Japan) with a 10× lens

Luminescent supramolecular hydrogels from a tripeptide and nitrogen-doped carbon nanodots

• Maria C. Cringoli,
• Slavko Kralj,
• Marina Kurbasic,
• Massimo Urban and
• Silvia Marchesan

Beilstein J. Nanotechnol. 2017, 8, 1553–1562, doi:10.3762/bjnano.8.157

• prepared in phosphate buffer as previously described [25] at the desired concentration as described in Table 1. Briefly, the peptide was dissolved in a 0.1 M solution of sodium phosphate at pH 11.8 (alkaline buffer), and then an equal volume of 0.1 M solution of sodium phosphate buffer at pH 5.8 (acidic

• -ozone cleaner (UV-Ozone Procleaner Plus) for 45 mins to make the grid surface more hydrophilic. Then, the six-hour-aged gels were precisely deposited on a TEM grid, dried for 15 min at room temperature, and contrasted by an aqueous tungsten phosphate solution (pH 7.4). The average size or cross-section

Calcium fluoride based multifunctional nanoparticles for multimodal imaging

• Marion Straßer,
• Joachim H. X. Schrauth,
• Sofia Dembski,
• Daniel Haddad,
• Bernd Ahrens,
• Stefan Schweizer,
• Bastian Christ,
• Alevtina Cubukova,
• Marco Metzger,
• Heike Walles,
• Peter M. Jakob and
• Gerhard Sextl

Beilstein J. Nanotechnol. 2017, 8, 1484–1493, doi:10.3762/bjnano.8.148

• is to create multifunctional NPs by precipitation and simultaneous doping of the NP matrix with various ions [8][9]. Due to their co-doping with lanthanide ions, NPs on the basis of calcium phosphate or gadolinium oxide are also detectable by MRI and PL [10][11][12][13]. In recent years, fluorides

Development of polycationic amphiphilic cyclodextrin nanoparticles for anticancer drug delivery

• Gamze Varan,
• Juan M. Benito,
• Carmen Ortiz Mellet and
• Erem Bilensoy

Beilstein J. Nanotechnol. 2017, 8, 1457–1468, doi:10.3762/bjnano.8.145

• nanoparticles at pH 7.4 phosphate buffer solution under sink conditions (n = 3, ± SD). Cytotoxicity of unloaded amphiphilic CD nanoparticles on L929 mouse fibroblast cell line with MTT assay (CD concentration is 0.5 mg/mL in all formulation) (n = 3, ± SD). IC50 value of PCX solution in DMSO on MCF-7 human

Cationic PEGylated polycaprolactone nanoparticles carrying post-operation docetaxel for glioma treatment

• Cem Varan and
• Erem Bilensoy

Beilstein J. Nanotechnol. 2017, 8, 1446–1456, doi:10.3762/bjnano.8.144

• associated drug percentage (%) was calculated as follows: In vitro docetaxel release: The in vitro release profile of DOC from nanoparticles and film formulations was determined by using the dialysis membrane technique under sink conditions in a shaking water bath at 37 °C in phosphate buffer solution (PBS

Low uptake of silica nanoparticles in Caco-2 intestinal epithelial barriers

• Dong Ye,
• Mattia Bramini,
• Delyan R. Hristov,
• Sha Wan,
• Anna Salvati,
• Christoffer Åberg and
• Kenneth A. Dawson

Beilstein J. Nanotechnol. 2017, 8, 1396–1406, doi:10.3762/bjnano.8.141

• cytometry. After exposure to 100 µg/mL nanoparticles dispersed in the absence and presence of 10 % FBS, the dispersions were removed from each well and cells were rinsed twice with fresh phosphate buffered saline (PBS). Then, 1 mL 0.1% trypsin-ethylenediaminetetraacetic acid (EDTA) solution was added and

• in Sorensen’s phosphate buffer, and post fixed in osmium tetroxide (1%, w/v) in de-ionised water for 1 h. The samples were rinsed in Sorensen’s phosphate buffer and dehydrated by incubation in 30%, 50%, 70%, 90% and 100% ethanol solutions. The cells were immersed in ethanol/Epon (1:1, v/v) mixture

Bright fluorescent silica-nanoparticle probes for high-resolution STED and confocal microscopy

• Isabella Tavernaro,
• Christian Cavelius,
• Henrike Peuschel and
• Annette Kraegeloh

Beilstein J. Nanotechnol. 2017, 8, 1283–1296, doi:10.3762/bjnano.8.130

• °C, 9% CO2). The cells were seeded on cover slips with a density of 1·105 cells per cm2 and allowed to attach for 24 h. After 24 h of incubation in presence of the nanoparticles, the medium was removed and the cells were washed two times with Dulbecco's phosphate-buffered saline (DPBS, Gibco, USA

Characterization of ferrite nanoparticles for preparation of biocomposites

• Urszula Klekotka,
• Magdalena Rogowska,
• Dariusz Satuła and
• Beata Kalska-Szostko

Beilstein J. Nanotechnol. 2017, 8, 1257–1265, doi:10.3762/bjnano.8.127

• of Tris-HCl or phosphate-buffered saline (PBS), all purchased from Sigma-Aldrich. The quality of the ferrite nanoparticle cores was analyzed by transmission electron microscope (TEM) on a Tecnai G2 X-TWIN type from FEI. For such purposes, a drop of diluted in ethanol particles was drop-casted on a Cu

Evaluation of quantum dot conjugated antibodies for immunofluorescent labelling of cellular targets

• Jennifer E. Francis,
• David Mason and
• Raphaël Lévy

Beilstein J. Nanotechnol. 2017, 8, 1238–1249, doi:10.3762/bjnano.8.125

• of the immunofluorescence procedure is shown in Figure 8. Briefly, cells were seeded onto glass coverslips and grown until confluent, washed once in phosphate buffered saline (PBS) (37 °C), and fixed in 4% (w/v) paraformaldehyde (PFA) for 10 min or 100% ice cold methanol (5 min). Cells were washed 3

Nano-engineered skin mesenchymal stem cells: potential vehicles for tumour-targeted quantum-dot delivery

• Liga Saulite,
• Dominyka Dapkute,
• Karlis Pleiko,
• Ineta Popena,
• Simona Steponkiene,
• Ricardas Rotomskis and
• Una Riekstina

Beilstein J. Nanotechnol. 2017, 8, 1218–1230, doi:10.3762/bjnano.8.123

• were washed with cold phosphate-buffered saline (PBS), cut into 4–6 mm2 pieces and incubated in 0.6 U/mL dispase (Roche, Switzerland) for 1–3 h at 37 °C to remove the epidermis. Dermis was minced manually before enzymatic digestion with 0.62 Wunsch U/mL Liberase Blendzyme 1 (Roche, Switzerland) for 30