pH-Controlled fluorescence switching in water-dispersed polymer brushes grafted to modified boron nitride nanotubes for cellular imaging

• Saban Kalay,
• Yurij Stetsyshyn,
• Volodymyr Donchak,
• Khrystyna Harhay,
• Ostap Lishchynskyi,
• Halyna Ohar,
• Yuriy Panchenko,
• Stanislav Voronov and
• Mustafa Çulha

Beilstein J. Nanotechnol. 2019, 10, 2428–2439, doi:10.3762/bjnano.10.233

• ); characteristic infrared spectra bands – ν (С=О) in Ar-C(O)Cl, ν (С=О) in ester group at 1760 and 1752 cm−1; doublet at 1390, 1365 cm−1, referred to δ(C(CH3)3) and a band of tert-butoxy group at 848 cm−1. BNNT synthesis and purification The BNNTs were synthesized by chemical vapor deposition from colemanite (2 g

• . The furnace temperature was set to a heating rate of 8 °C/min up to 1280 °C and then held at this temperature for 3 h. The furnace was cooled down to ambient temperature. Thereafter, the BNNTs were collected from the top of the alumina boat and stored in a dry environment. For the purification, the

Coating of upconversion nanoparticles with silica nanoshells of 5–250 nm thickness

• Cynthia Kembuan,
• Maysoon Saleh,
• Bastian Rühle,
• Ute Resch-Genger and
• Christina Graf

Beilstein J. Nanotechnol. 2019, 10, 2410–2421, doi:10.3762/bjnano.10.231

• followed by a stepwise growth of these particles without a purification step, where in each step equal volumes of tetraethyl orthosilicate and ammonia water are added, while the volumes of cyclohexane and the surfactant Igepal® CO-520 are increased so that the ammonia water and surfactant concentrations

• silica in reverse microemulsions was reported before [53][54][55][56] and attributed to the presence of the Igepal CO-520 on the NP surface. However, extensive purification of the particles after the growth of the first silica shell by repeated centrifugation and redispersion in ethanol did not

• without any intermediate isolation or purification steps of the nanoparticles. In each step, the same volumes of TEOS and ammonia water were added, and the volumes of cyclohexane and Igepal CO-520 were increased so that the ammonia water concentration in cyclohexane was 3.3 ± 0.1 wt %, and that of Igepal

Microfluidics as tool to prepare size-tunable PLGA nanoparticles with high curcumin encapsulation for efficient mucus penetration

• Nashrawan Lababidi,
• Valentin Sigal,
• Aljoscha Koenneke,
• Konrad Schwarzkopf,
• Andreas Manz and
• Marc Schneider

Beilstein J. Nanotechnol. 2019, 10, 2280–2293, doi:10.3762/bjnano.10.220

• overview of the concentration of the different components is given in Table 2. The indicated volume of solvents was used for synthesis with 600 mg PLGA and should be adjusted accordingly for other quantities. For the purification step, the polymer was dissolved in 20 mL of acetone and precipitated by

• adding the same volume of ethanol. The phases were separated by centrifugation at 20,000g for 20 min. The colored supernatant was removed and the polymer was obtained as a pink residue. The purification step was repeated for five cycles. After the last centrifugation, the polymer was dried under vacuum

Nontoxic pyrite iron sulfide nanocrystals as second electron acceptor in PTB7:PC₇₁BM-based organic photovoltaic cells

• Olivia Amargós-Reyes,
• José-Luis Maldonado,
• Omar Martínez-Alvarez,
• María-Elena Nicho,
• José Santos-Cruz,
• Juan Nicasio-Collazo,
• Irving Caballero-Quintana and
• Concepción Arenas-Arrocena

Beilstein J. Nanotechnol. 2019, 10, 2238–2250, doi:10.3762/bjnano.10.216

• and synthesis of FeS2 nanocrystals All chemicals were used as received without further purification. For FeS2 synthesis, iron(II) chloride, octadecylamine and diphenyl ether were acquired from Sigma-Aldrich. For OPV fabrication, indium tin oxide (ITO) covered glass substrates (10 Ω/sq, ≈165 nm

Targeted therapeutic effect against the breast cancer cell line MCF-7 with a CuFe₂O₄/silica/cisplatin nanocomposite formulation

• B. Rabindran Jermy,
• Vijaya Ravinayagam,
• Widyan A. Alamoudi,
• Dana Almohazey,
• Hatim Dafalla,
• Lina Hussain Allehaibi,
• Abdulhadi Baykal,
• Muhammet S. Toprak and
• Thirunavukkarasu Somanathan

Beilstein J. Nanotechnol. 2019, 10, 2217–2228, doi:10.3762/bjnano.10.214

• -house using tetraethyl orthosilicalite and tetrapropylammonium hydroxide as the silica source and template. All chemicals were used as-receied without any further modification or purification. Preparation of 30 wt % CuFe2O4/HYPS The sample was prepared by mixing 0.65 g of Cu(NO3)2·3H2O and 1.01 g of Fe

Ultrathin Ni_1−xCo_xS₂ nanoflakes as high energy density electrode materials for asymmetric supercapacitors

• Xiaoxiang Wang,
• Teng Wang,
• Rusen Zhou,
• Lijuan Fan,
• Shengli Zhang,
• Feng Yu,
• Tuquabo Tesfamichael,
• Liwei Su and
• Hongxia Wang

Beilstein J. Nanotechnol. 2019, 10, 2207–2216, doi:10.3762/bjnano.10.213

• hexahydrate (Co(NO3)2·6H2O), 2-methylimidazole (2MI), sulfur powder, absolute methanol and all other reagents were analytical grade and used as received without further purification unless otherwise stated. Deionised water was provided by a Milli-Q water system. YP-50F activated carbon was bought from Kuraray

• without any purification. All other chemicals were purchased from Sigma-Aldrich. Synthesis of Ni1.7Co1.3O4 powder precursor The Ni1.7Co1.3O4 precursor was prepared by a facile two-step method. In a solvothermal procedure, similarly to [19], 10 mmol·L−1 nickel nitrate hexahydrate, 10 mmol·L−1 cobalt

Mannosylated brush copolymers based on poly(ethylene glycol) and poly(ε-caprolactone) as multivalent lectin-binding nanomaterials

• Stefania Ordanini,
• Wanda Celentano,
• Anna Bernardi and
• Francesco Cellesi

Beilstein J. Nanotechnol. 2019, 10, 2192–2206, doi:10.3762/bjnano.10.212

• glycopolymers can be potentially utilized as targeted anti-pathogenic nanomaterials and as well as for cell-targeted drug delivery. Experimental General procedures Chemicals were purchased by commercial sources and used without further purification, unless otherwise indicated. Polyethylene glycol methyl ether

• -ethylhexanoate (Sn(Oct)2, 0.0709 g, 0.175 mmol, 0.005 equiv) was prepared, stirred under a nitrogen flow for 20 min, and then added to the ε-caprolactone. The reaction mixture was stirred for 6 h at 130 °C, then stopped by cooling the flask to room temperature. Purification was carried out by dissolving the

• min. Finally, THF, the catalyst solution (containing CuBr/HMTETA 1 equiv with respect to the initiator) and the initiator (1 equiv, ethyl 2-bromo-2-methylpropionate (1)) were added to the monomers. The reaction mixture was stirred for 6 h at 50 °C under nitrogen atmosphere. The purification was

Use of data processing for rapid detection of the prostate-specific antigen biomarker using immunomagnetic sandwich-type sensors

• Camila A. Proença,
• Tayane A. Freitas,
• Thaísa A. Baldo,
• Elsa M. Materón,
• Flávio M. Shimizu,
• Gabriella R. Ferreira,
• Frederico L. F. Soares,
• Ronaldo C. Faria and
• Osvaldo N. Oliveira Jr.

Beilstein J. Nanotechnol. 2019, 10, 2171–2181, doi:10.3762/bjnano.10.210

• solutions were prepared with ultrapure water (18 MΩ·cm at 25 °C) obtained from a Milli-Q Direct-0.3 (Millipore) purification system. Fabrication of sandwich-type electrochemical immunosensors The multi-channel screen-printed array of electrodes was fabricated according to the procedures established by Faria

Incorporation of doxorubicin in different polymer nanoparticles and their anticancer activity

• Sebastian Pieper,
• Hannah Onafuye,
• Dennis Mulac,
• Jindrich Cinatl Jr.,
• Mark N. Wass,
• Martin Michaelis and
• Klaus Langer

Beilstein J. Nanotechnol. 2019, 10, 2062–2072, doi:10.3762/bjnano.10.201

• ) PVA solution. After stirring overnight, the resultant nanoparticles were purified three times by centrifugation at 21,000g for 15 min (Eppendorf Centrifuge 5430 R, Eppendorf, Hamburg, Germany) and re-dispersion in purified water. After the final purification step, an aliquot of the nanoparticle

Synthesis of highly active ETS-10-based titanosilicate for heterogeneously catalyzed transesterification of triglycerides

• Muhammad A. Zaheer,
• David Poppitz,
• Khavar Feyzullayeva,
• Marianne Wenzel,
• Jörg Matysik,
• Radomir Ljupkovic,
• Aleksandra Zarubica,
• Alexander A. Karavaev,
• Andreas Pöppl,
• Roger Gläser and
• Muslim Dvoyashkin

Beilstein J. Nanotechnol. 2019, 10, 2039–2061, doi:10.3762/bjnano.10.200

• %, Fluka, Sigma-Aldrich) were used. In the post-synthetic treatment of ETS-10, hydrogen peroxide (H2O2, 30 wt %, Merck Millipore) and distilled deionized water (DDW, 0.055 μS conductivity, PureLab flex 3 & 4 water purification systems) were used. Chemicals used in the transesterification reaction and gas

• ) were used for calibration of analytes. All mentioned materials and chemicals were used without further purification. Preparation of the CaO-based catalysts The CaO precursors were activated at temperatures of 1073 K, 1173 K, and 1273 K for 3 h under static air conditions in the Elektron Co. furnace

Optimization and performance of nitrogen-doped carbon dots as a color conversion layer for white-LED applications

• Tugrul Guner,
• Hurriyet Yuce,
• Didem Tascioglu,
• Eren Simsek,
• Umut Savaci,
• Aziz Genc,
• Servet Turan and
• Mustafa M. Demir

Beilstein J. Nanotechnol. 2019, 10, 2004–2013, doi:10.3762/bjnano.10.197

• with a low CCT were achieved. Experimental Materials and methods Diammonium hydrogen citrate and urea were purchased from Sigma-Aldrich (St. Louis, MO, USA) and used without further purification. PVP (MW: 58,000, Alfa Aeasar) was used in the form of the polymer matrix. Commercial red phosphor, Sr2Si5N8

Gold-coated plant virus as computed tomography imaging contrast agent

• Alaa A. A. Aljabali,
• Mazhar S. Al Zoubi,
• Khalid M. Al-Batanyeh,
• Ali Al-Radaideh,
• Mohammad A. Obeid,
• Abeer Al Sharabi,
• Walhan Alshaer,
• Bayan AbuFares,
• Tasnim Al-Zanati,
• Murtaza M. Tambuwala,
• Naveed Akbar and
• David J. Evans

Beilstein J. Nanotechnol. 2019, 10, 1983–1993, doi:10.3762/bjnano.10.195

• purification of the antibody-labeled particles suggesting successful modification of their exterior surface. This observed increase in the hydrodynamic radius is consistent with the previous report of particles coated with proteins [39]. In addition, the UV–vis spectrum was used to evaluate the surface

Porous silver-coated pNIPAM-co-AAc hydrogel nanocapsules

• William W. Bryan,
• Riddhiman Medhi,
• Maria D. Marquez,
• Supparesk Rittikulsittichai,
• Michael Tran and
• T. Randall Lee

Beilstein J. Nanotechnol. 2019, 10, 1973–1982, doi:10.3762/bjnano.10.194

• . The particles were then centrifuged at 3500 rpm for 1 h and redispersed in 20 mL of water. For complete purification of the particles, this cycle was repeated three times to remove any unreacted pDADMAC. To facilitate the attachment of gold seeds, a THPC gold solution was prepared using a modified

Synthesis and potent cytotoxic activity of a novel diosgenin derivative and its phytosomes against lung cancer cells

• Liang Xu,
• Dekang Xu,
• Ziying Li,
• Yu Gao and
• Haijun Chen

Beilstein J. Nanotechnol. 2019, 10, 1933–1942, doi:10.3762/bjnano.10.189

• used without further purification. Preparative column chromatography was performed using silica gel 60 with particle size 0.063–0.200 mm (70–230 mesh, Flash). Analytical thin-layer chromatography (TLC) was carried out employing silica gel 60 F254 plates (Merck, Darmstadt). Nuclear magnetic resonance

Facile synthesis of carbon nanotube-supported NiO//Fe₂O₃ for all-solid-state supercapacitors

• Shengming Zhang,
• Xuhui Wang,
• Yan Li,
• Xuemei Mu,
• Yaxiong Zhang,
• Jingwei Du,
• Guo Liu,
• Xiaohui Hua,
• Yingzhuo Sheng,
• Erqing Xie and
• Zhenxing Zhang

Beilstein J. Nanotechnol. 2019, 10, 1923–1932, doi:10.3762/bjnano.10.188

• further purification. The preparation of the positive and negative electrodes and the device structures are illustrated in Figure 1. The detailed process is as follows: Fabrication of carbon nanotubes on carbon cloth (CC-CNT) Carbon nanotubes (CNTs) were grown on carbon cloth (CC) (CeTech Co., Ltd.) by

Charge-transfer interactions between fullerenes and a mesoporous tetrathiafulvalene-based metal–organic framework

• Manuel Souto,
• Joaquín Calbo,
• Samuel Mañas-Valero,
• Aron Walsh and
• Guillermo Mínguez Espallargas

Beilstein J. Nanotechnol. 2019, 10, 1883–1893, doi:10.3762/bjnano.10.183

• , understanding the CT processes between the electron-acceptor C60 and the electron-donor molecules is fundamental in order to optimise photovoltaics and develop efficient solar cells [28]. The encapsulation of C60 in MOFs [29] has become a very interesting strategy for the purification of fullerenes [30][31][32

Engineered superparamagnetic iron oxide nanoparticles (SPIONs) for dual-modality imaging of intracranial glioblastoma via EGFRvIII targeting

• Xianping Liu,
• Chengjuan Du,
• Haichun Li,
• Ting Jiang,
• Zimiao Luo,
• Zhiqing Pang,
• Daoying Geng and
• Jun Zhang

Beilstein J. Nanotechnol. 2019, 10, 1860–1872, doi:10.3762/bjnano.10.181

• cytotoxicity assay kit was obtained from Sigma (USA). Puromycin was purchased from Aladdin (Shanghai, China). All other reagents were of analytical grade and used without further purification. Cells and animals The human glioblastoma cell line, U87MG, was purchased from The Institute of Biochemistry and Cell

Processing nanoporous organic polymers in liquid amines

• Jeehye Byun,
• Damien Thirion and
• Cafer T. Yavuz

Beilstein J. Nanotechnol. 2019, 10, 1844–1850, doi:10.3762/bjnano.10.179

• such as gas adsorption and storage [2], water purification [3], energy storage [4], and catalysis [5], where the large and permanent voids in nanoporous polymers provide room to accommodate target substrates and guest molecules. A series of nanoporous polymers have been reported, namely covalent

Biocatalytic oligomerization-induced self-assembly of crystalline cellulose oligomers into nanoribbon networks assisted by organic solvents

• Yuuki Hata,
• Yuka Fukaya,
• Toshiki Sawada,
• Masahito Nishiura and
• Takeshi Serizawa

Beilstein J. Nanotechnol. 2019, 10, 1778–1788, doi:10.3762/bjnano.10.173

• powdery state were used. The spectra were recorded on an FT/IR-4100 instrument (JASCO) at a cumulative measurement number of 100 and a resolution of 2.0 cm−1 under ambient conditions. For SEM observations, the water solvent of the hydrogels after purification was exchanged stepwise with 10, 20, 30, 40, 50

Synthesis of nickel/gallium nanoalloys using a dual-source approach in 1-alkyl-3-methylimidazole ionic liquids

• Ilka Simon,
• Julius Hornung,
• Juri Barthel,
• Jörg Thomas,
• Maik Finze,
• Roland A. Fischer and
• Christoph Janiak

Beilstein J. Nanotechnol. 2019, 10, 1754–1767, doi:10.3762/bjnano.10.171

• solvent purification system or 4 Å molecular sieves (1-methylimidazole, 1-chlorobutane) and stored over 4 Å molecular sieves in a nitrogen atmosphere. Remaining water contents of the solvents were measured by a coulometric Karl-Fischer titration (ECH/ANALYTIK JENA AQUA 40.00) and did not exceed 10 ppm. Ni

• (COD)2 was purchased from ABCR, stored at −4 °C and used without further purification. GaCp* was synthesized according to literature under strictly inert dry argon conditions [69]. The ionic liquid [BMIm][NTf2] was synthesized according to the literature by reacting 1-methylimidazole with 1

Novel hollow titanium dioxide nanospheres with antimicrobial activity against resistant bacteria

• Carol López de Dicastillo,
• Cristian Patiño,
• María José Galotto,
• Yesseny Vásquez-Martínez,
• Claudia Torrent,
• Daniela Alburquenque,
• Alejandro Pereira and
• Juan Escrig

Beilstein J. Nanotechnol. 2019, 10, 1716–1725, doi:10.3762/bjnano.10.167

• their high stability, low cost, reusability, and high photocatalytic activity [6][7][8]. These excellent properties have been applied in many products such as foods, catalyst support, air purification, water disinfection, antibacterial, cosmetics and solar cells [9][10]. Photocatalytic TiO2 favors the

Doxorubicin-loaded human serum albumin nanoparticles overcome transporter-mediated drug resistance in drug-adapted cancer cells

• Hannah Onafuye,
• Sebastian Pieper,
• Dennis Mulac,
• Jindrich Cinatl Jr.,
• Mark N. Wass,
• Klaus Langer and
• Martin Michaelis

Beilstein J. Nanotechnol. 2019, 10, 1707–1715, doi:10.3762/bjnano.10.166

• addition of 23.6 µL 8% (w/v) aqueous glutaraldehyde solution in 200% cross-linking. The suspension was then stirred for 12 h at 550 rpm. The particles were purified by centrifugation (at 16,000g for 12 min) and resuspension steps performed three times in purified water. During the particle purification the

Upcycling of polyurethane waste by mechanochemistry: synthesis of N-doped porous carbon materials for supercapacitor applications

• Christina Schneidermann,
• Pascal Otto,
• Desirée Leistenschneider,
• Sven Grätz,
• Claudia Eßbach and
• Lars Borchardt

Beilstein J. Nanotechnol. 2019, 10, 1618–1627, doi:10.3762/bjnano.10.157

• these materials could also be extended to other energy storage systems such as Li-ion batteries or waste-water purification, wherever materials with a high surface area and improved wettability are required. Experimental Synthesis of N-doped carbon In a similar manner to [36][64], nitrogen-doped porous

Chiral nanostructures self-assembled from nitrocinnamic amide amphiphiles: substituent and solvent effects

• Hejin Jiang,
• Huahua Fan,
• Yuqian Jiang,
• Li Zhang and
• Minghua Liu

Beilstein J. Nanotechnol. 2019, 10, 1608–1617, doi:10.3762/bjnano.10.156

• suppliers and used without further purification. Synthesis of NCLG gelators The synthesis and characterization of the precursors N,N’-bisoctadecyl-ʟ-glutamic diamide (LGAm) has been reported previously [46]. 2-NCA, 3-NCA and 4-NCA (0.59 g, 3.07 mmol) were respectively dispersed into 200 mL of

Graphynes: an alternative lightweight solution for shock protection

• Kang Xia,
• Haifei Zhan,
• Aimin Ji,
• Jianli Shao,
• Yuantong Gu and
• Zhiyong Li

Beilstein J. Nanotechnol. 2019, 10, 1588–1595, doi:10.3762/bjnano.10.154

• efforts make the realization of entire monocrystalline GYs possible in foreseeable future. As an atomically thin 2D carbon nanostructure, its application in various fields is currently explored. For instance, the relatively large pore sizes in GY allows for a usage in desalination and water purification