Theranostic potential of self-luminescent branched polyethyleneimine-coated superparamagnetic iron oxide nanoparticles

• Rouhollah Khodadust,
• Ozlem Unal and
• Havva Yagci Acar

Beilstein J. Nanotechnol. 2022, 13, 82–95, doi:10.3762/bjnano.13.6

• , Uskudar, Istanbul, Turkey Koc University, Graduate School of Materials Science and Engineering, Rumelifeneri Yolu, Sariyer, Istanbul, Turkey 10.3762/bjnano.13.6 Abstract Polyethylenimine (PEI), which is frequently used for polyplex formation and effective gene transfection, is rarely recognized as a

Modification of a SERS-active Ag surface to promote adsorption of charged analytes: effect of Cu²⁺ ions

• Bahdan V. Ranishenka,
• Andrei Yu. Panarin,
• Irina A. Chelnokova,
• Sergei N. Terekhov,
• Peter Mojzes and
• Vadim V. Shmanai

Beilstein J. Nanotechnol. 2021, 12, 902–912, doi:10.3762/bjnano.12.67

• , which leads to a high immobilization efficiency. The sodium citrate concentration (2.5 mM) was adjusted to obtain a maximal NP surface filling and, at the same time, to avoid NP aggregation caused by high salt concentration. Figure 2 shows absorption spectra of the polyethylenimine (PEI)-modified glass

• membrane (cutoff = 12 kDa), branched polyethylenimine (PEI, MW = 25000), polyhexamethylene guanidine hydrochloride (PHMG), analytical grade DMSO, NaI, LiCl, AgNO3, sodium mercaptoethyl sulfonate, mercaptopropionic acid, 2-mercaptoethanol, 2-(dimethylamino)ethanethiol hydrochloride, acetylthiocholine

The impact of molecular tumor profiling on the design strategies for targeting myeloid leukemia and EGFR/CD44-positive solid tumors

• Nikola Geskovski,
• Nadica Matevska-Geshkovska,
• Simona Dimchevska Sazdovska,
• Marija Glavas Dodov,
• Kristina Mladenovska and
• Katerina Goracinova

Beilstein J. Nanotechnol. 2021, 12, 375–401, doi:10.3762/bjnano.12.31

PEG/PEI-functionalized single-walled carbon nanotubes as delivery carriers for doxorubicin: synthesis, characterization, and in vitro evaluation

• Shuoye Yang,
• Zhenwei Wang,
• Yahong Ping,
• Yuying Miao,
• Yongmei Xiao,
• Lingbo Qu,
• Lu Zhang,
• Yuansen Hu and
• Jinshui Wang

Beilstein J. Nanotechnol. 2020, 11, 1728–1741, doi:10.3762/bjnano.11.155

• . In this study, raw SWCNTs were purified with different oxidizing acids, and the resulting shortened CNTs were conjugated with poly(ethylene glycol) (PEG) and polyethylenimine (PEI). The different nanocarriers, that is, CNTs-COOH (CNTs), CNTs-PEG and CNTs-PEG-PEI, were systematically characterized and

• drugs. Keywords: antitumor activity; cellular uptake; PEG functionalization; PEI functionalization; poly(ethylene glycol) (PEG); polyethylenimine (PEI); single-walled carbon nanotubes; Introduction To date, chemotherapy is the most common therapy for cancer treatment. However, the inability of

• PEG and polyethylenimine (PEI), which contains amino groups, were synthesized (CNTs-PEG-PEI). The length of the SWCNTs was first shortened by ultrasonic scission in different strong acid solutions for improving the dispersion in water. Afterwards, PEG and PEI were grafted onto the CNTs. This

Photothermally active nanoparticles as a promising tool for eliminating bacteria and biofilms

• Mykola Borzenkov,
• Piersandro Pallavicini,
• Angelo Taglietti,
• Laura D’Alfonso,
• Maddalena Collini and
• Giuseppe Chirico

Beilstein J. Nanotechnol. 2020, 11, 1134–1146, doi:10.3762/bjnano.11.98

• be preassembled and grafted on a polyethylenimine (PEI)-functionalized glass surface, as depicted in Figure 5. Also such surfaces demonstrated both an intrinsic and a NIR-irradiation-enhanced antibacterial effect towards Gram-positive (S. aureus) and Gram-negative (E. coli) strains [71]. Silver core

• ://creativecommons.org/licenses/by/4.0/. A synthetic preparation route for silver nanoplates on polyethylenimine (PEI)-functionalized glass (A). Temperature increase of grafted silver nanoplates under NIR irradiation (808 nm, 0.26 W/cm2). The red line corresponds to the NIR irradiation on a bare glass surface (B

Internalization mechanisms of cell-penetrating peptides

• Ivana Ruseska and
• Andreas Zimmer

Beilstein J. Nanotechnol. 2020, 11, 101–123, doi:10.3762/bjnano.11.10

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

• conditions [34]. The so-obtained hybrids were further wrapped with anionic polyelectrolyte polystyrene sulfonate (PSS) and then with cationic polyethylenimine (PEI). A modification of this hybrid, PEI/PSS/SPIO/oMWCNT#Yin, was additionally synthesized by covalent carboxylic-amine crosslinking with folic acid

pH-Triggered release from surface-modified poly(lactic-co-glycolic acid) nanoparticles

• Manuel Häuser,
• Klaus Langer and
• Monika Schönhoff

Beilstein J. Nanotechnol. 2015, 6, 2504–2512, doi:10.3762/bjnano.6.260

• ), and zeta potential. PLGA nanoparticles were (249 ± 4) nm in diameter, showing a narrow size distribution (PDI 0.04 ± 0.02) and a zeta potential of (−53 ± 1) mV. After adsorption of the initial layer of polyethylenimine (PEI), the particles were washed as described in the Experimental section. The

• ), as well as aqueous solutions of polyethylenimine (PEI) (Mw ≈ 50,000–60,000 g/mol; 50 wt %) and polyacrylic acid (PAA) (Mw ≈ 100,000 g/mol; 35 wt %) were purchased from Sigma–Aldrich (Steinheim, Germany). An aqueous solution of poly(diallyldimethylammonium chloride) (PDADMAC) (Mw ≈ 8,500 g/mol; 28 wt

Synthesis of boron nitride nanotubes and their applications

• Saban Kalay,
• Zehra Yilmaz,
• Ozlem Sen,
• Melis Emanet,
• Emine Kazanc and
• Mustafa Çulha

Beilstein J. Nanotechnol. 2015, 6, 84–102, doi:10.3762/bjnano.6.9

• properties. However, this process adds further uncertainties to the assessment since another material is introduced into the system. For example, polyethylenimine (PEI) is a cytocompatible polymer and principally used for DNA transfection and cell permeabilization. The BNNTs were coated with PEI for

Influence of stabilising agents and pH on the size of SnO₂ nanoparticles

• Olga Rac,
• Patrycja Suchorska-Woźniak,
• Marta Fiedot and
• Helena Teterycz

Beilstein J. Nanotechnol. 2014, 5, 2192–2201, doi:10.3762/bjnano.5.228

• , polyethylenimine (PEI) or polyvinylpyrrolidone (PVP), and t-octylphenoxypolyethoxyethanol (Triton X-100) as a surfactant with a hydrophilic–lipophilic balance (HBL) of 13.5. Anhydrous tin(IV) chloride is a strong Lewis acid and easily forms complexes [21]. In contrast, PEI is a synthetic cationic polymer which may

• exceeding the PSP. Probably, after having exceeded this point, all active parts of the polymer are occupied by surfactant particles and then the polymer no longer serves as a stabiliser for the nanoparticles. The influence of polymer choice on the nanoparticle diameter Two polymers, polyethylenimine (PEI