Green SPIONs as a novel highly selective treatment for leishmaniasis: an in vitro study against Leishmania amazonensis intracellular amastigotes

• Brunno R. F. Verçoza,
• Robson R. Bernardo,
• Luiz Augusto S. de Oliveira and
• Juliany C. F. Rodrigues

Beilstein J. Nanotechnol. 2023, 14, 893–903, doi:10.3762/bjnano.14.73

• promastigotes (control and treated cells) were washed in phosphate-buffered saline (PBS) pH 7.2 and adhered for 10 min on glass coverslips previously coated with poly-ʟ-lysine (Sigma-Aldrich, Germany). The intracellular amastigotes were obtained after infection of RAW 264.7 macrophages at a ratio of ten

• parasites to one macrophage. After treatment, cells were washed in PBS pH 7.2, fixed, and dehydrated, as described in [9]. Finally, cells were observed using a DM2500 optical microscope (Leica Microsystem, Germany) in bright-field mode. Electron microscopy analysis Control and treated cells were washed in

• PBS pH 7.2, fixed, and post-fixed according to previously published protocols [23]. Then, cells were processed for scanning electron microscopy and chemical element mapping analysis as described in [9]. The micrographs were obtained using a TESCAN VEGA 3 LMU scanning electron microscope operating at

Nanostructured lipid carriers containing benznidazole: physicochemical, biopharmaceutical and cellular in vitro studies

• Giuliana Muraca,
• María Esperanza Ruiz,
• Rocío C. Gambaro,
• Sebastián Scioli-Montoto,
• María Laura Sbaraglini,
• Gisel Padula,
• José Sebastián Cisneros,
• Cecilia Yamil Chain,
• Vera A. Álvarez,
• Cristián Huck-Iriart,
• Guillermo R. Castro,
• María Belén Piñero,
• Matias Ildebrando Marchetto,
• Catalina Alba Soto,
• Germán A. Islan and
• Alan Talevi

Beilstein J. Nanotechnol. 2023, 14, 804–818, doi:10.3762/bjnano.14.66

• . A Platinum EPS C8 (150 mm × 4.6 mm, 5 μm, GraceTM, Columbia, MD, USA) column was used; the mobile phase consisted of a mixture of methanol and 0.02% phosphoric acid solution (60:40) for a final pH of 2.5. The system was operated isocratically at a 1.0 mL/min flow rate and the detection was performed

• at 324 nm. The volume of injection was 20 μL. In vitro benznidazole release assay The release of BNZ from the nanoparticles was performed in a rotating paddle apparatus (Vision Classic 6, Hanson Research, Chatsworth, CA, USA) at 75 rpm using 500 mL of KH2PO4 buffer (pH 6.8) as the dissolution medium

Silver nanoparticles loaded on lactose/alginate: in situ synthesis, catalytic degradation, and pH-dependent antibacterial activity

• Nguyen Thi Thanh Tu,
• T. Lan-Anh Vo,
• T. Thu-Trang Ho,
• Kim-Phuong T. Dang,
• Van-Dung Le,
• Phan Nhat Minh,
• Chi-Hien Dang,
• Vinh-Thien Tran,
• Van-Su Dang,
• Tran Thi Kim Chi,
• Hieu Vu-Quang,
• Radek Fajgar,
• Thi-Lan-Huong Nguyen,
• Van-Dat Doan and
• Thanh-Danh Nguyen

Beilstein J. Nanotechnol. 2023, 14, 781–792, doi:10.3762/bjnano.14.64

• catalytic performance in degrading the pollutants methyl orange and rhodamine B. The antibacterial activity of the nanocomposite is pH-dependent, related to the alterations in surface properties of the nanocomposite at different pH values. At pH 6, the nanocomposite demonstrated the highest antibacterial

• properties of AgNPs can be influenced by factors such as size, pH value, and ionic strength of the medium [28][29][30][31]. Extensive research has been dedicated to control the size and shape of AgNPs through the application of various capping agents. In addition to their antimicrobial properties, AgNPs are

• nanocomposites using saccharides, such as alginate, cyclodextrin, and lactose. This method allows for the loading of metallic ions onto the nanocomposite, followed by their reduction to nanoparticles [36][37]. The nanocomposite matrix can release silver in appropriate environments, exhibiting pH-dependent

Carboxylic acids and light interact to affect nanoceria stability and dissolution in acidic aqueous environments

• Matthew L. Hancock,
• Eric A. Grulke and
• Robert A. Yokel

Beilstein J. Nanotechnol. 2023, 14, 762–780, doi:10.3762/bjnano.14.63

• dissolution and stabilization have been previously studied in vitro using acidic aqueous environments. Nanoceria agglomerated in the presence of some carboxylic acids over 30 weeks, and degraded in others, at pH 4.5 (i.e., the pH value in phagolysosomes). Plants release carboxylic acids, and cerium

• within the rhizosphere [12][13]. Colloid stability of nanoceria is affected by temperature, pH, surface structure, surface-adsorbed organic and inorganic ligands, and metal/nonmetal ions and their concentrations in the solution surrounding the particles [14]. Nanoceria interacts with soil and plant roots

• , where it is known to dissolve and transform in the presence of chelating agents at low pH [15]. In cucumber plants, there is clear evidence of ceria uptake and transport throughout the plant. A fraction of the ceria formed cerium carboxyl complexes. No phytotoxicity was reported to the plant itself [16

In situ magnesiothermic reduction synthesis of a Ge@C composite for high-performance lithium-ion batterie anodes

• Ha Tran Huu,
• Ngoc Phi Nguyen,
• Vuong Hoang Ngo,
• Huy Hoang Luc,
• Minh Kha Le,
• Minh Thu Nguyen,
• My Loan Phung Le,
• Hye Rim Kim,
• In Young Kim,
• Sung Jin Kim,
• Van Man Tran and
• Vien Vo

Beilstein J. Nanotechnol. 2023, 14, 751–761, doi:10.3762/bjnano.14.62

• at 180 °C for 12 h. After cooling to room temperature, the solid was collected and rinsed with DI water to neutral pH. The dried solid was denoted as Ge/C-HT180. Solid-state reaction coupling to synthesize Ge/C-SS750 composite Relevant amounts of Ge and BC-800 at a mass ratio of 2:5 were well ground

A graphene quantum dots–glassy carbon electrode-based electrochemical sensor for monitoring malathion

• Sanju Tanwar,
• Aditi Sharma and
• Dhirendra Mathur

Beilstein J. Nanotechnol. 2023, 14, 701–710, doi:10.3762/bjnano.14.56

• , differential pulse voltammetry experiments were conducted with 0.1 M phosphate-buffered saline at pH 7. Results and Discussion Characterization of graphene quantum dots The UV–vis absorption spectrum of the GQDs in distilled water is depicted in Figure 2a, which shows two prominent absorption peaks around 270

• voltammetry (DPV) analysis was conducted with various concentrations of malathion in 0.1 M PBS (pH 7) at a scan rate of 50 mV·s−1. Different concentrations of malathion were detected. The oxidative desulfurization of malathion into malaoxon (Figure 8) results in a current peak (centered at +1.9 V) at the GQDs

The microstrain-accompanied structural phase transition from h-MoO₃ to α-MoO₃ investigated by in situ X-ray diffraction

• Zeqian Zhang,
• Honglong Shi,
• Boxiang Zhuang,
• Minting Luo and
• Zhenfei Hu

Beilstein J. Nanotechnol. 2023, 14, 692–700, doi:10.3762/bjnano.14.55

• procedure, 6.2 g of ammonium heptamolybdate was dissolved in 100 mL of deionized water and stirred for 30 min at room temperature. Nitric acid was then added to the solution to reduce the pH to 1. After stirring for another 15 min, the solution was transferred into a 200 mL Teflon-lined autoclave and heated

Metal-organic framework-based nanomaterials as opto-electrochemical sensors for the detection of antibiotics and hormones: A review

• Akeem Adeyemi Oladipo,
• Saba Derakhshan Oskouei and
• Mustafa Gazi

Beilstein J. Nanotechnol. 2023, 14, 631–673, doi:10.3762/bjnano.14.52

ZnO-decorated SiC@C hybrids with strong electromagnetic absorption

• Liqun Duan,
• Zhiqian Yang,
• Yilu Xia,
• Xiaoqing Dai,
• Jian’an Wu and
• Minqian Sun

Beilstein J. Nanotechnol. 2023, 14, 565–573, doi:10.3762/bjnano.14.47

• ZnNO3·6H2O (0.5, 1, 2, 3, and 4 mmol), 50 mL H2O, and 8 mL PEG were mixed together. After that, 40 mg SiC@C nanowires was added to the above solution, followed by magnetic stirring for 20 min. At 60 °C, NH3·H2O was added dropwise until pH 9–10. After 2 h of continual stirring, the products were obtained

Carbon nanotube-cellulose ink for rapid solvent identification

• Tiago Amarante,
• Thiago H. R. Cunha,
• Claudio Laudares,
• Ana P. M. Barboza,
• Ana Carolina dos Santos,
• Cíntia L. Pereira,
• Vinicius Ornelas,
• Bernardo R. A. Neves,
• André S. Ferlauto and
• Rodrigo G. Lacerda

Beilstein J. Nanotechnol. 2023, 14, 535–543, doi:10.3762/bjnano.14.44

• transistors, transparent conductors, gas sensors, supercapacitors, and pH sensors [41][42][47][48][49][50][51][52][53][54][55]. Different approaches to ink printing methods have been explored, such as aerosol jet, inkjet, syringe, roll-to-roll printing, and stamp methods [1][41][50]. In this work, we report a

Nanoarchitectonics to entrap living cells in silica-based systems: encapsulations with yolk–shell and sepiolite nanomaterials

• Celia Martín-Morales,
• Jorge Fernández-Méndez,
• Pilar Aranda and
• Eduardo Ruiz-Hitzky

Beilstein J. Nanotechnol. 2023, 14, 522–534, doi:10.3762/bjnano.14.43

• nanoparticles to reach the desired weight percentage (5.0% to 7.0%). Eventually, the concentrated cell biomass (33% to 40% v/v) was then added and the mixture was placed in a 7 cm diameter Petri dish, where it gelled at room temperature after the addition of 0.2 M KOH to achieve pH 7–8. Table 1 gathers the

The origin of black and white coloration of the Asian tiger mosquito Aedes albopictus (Diptera: Culicidae)

• Manuela Rebora,
• Gianandrea Salerno,
• Silvana Piersanti,
• Alexander Kovalev and
• Stanislav N. Gorb

Beilstein J. Nanotechnol. 2023, 14, 496–508, doi:10.3762/bjnano.14.41

• cacodylate buffer (Electron Microscopy Sciences, Hatfield, England), pH 7.2. The fixed legs were repeatedly rinsed in sodium cacodylate buffer and post-fixed for 1 h at 4 °C in 1% osmium tetroxide in sodium cacodylate buffer (Electron Microscopy Sciences). The samples were then repeatedly washed in the same

Mixed oxides with corundum-type structure obtained from recycling can seals as paint pigments: color stability

• Dienifer F. L. Horsth,
• Julia de O. Primo,
• Nayara Balaba,
• Fauze J. Anaissi and
• Carla Bittencourt

Beilstein J. Nanotechnol. 2023, 14, 467–477, doi:10.3762/bjnano.14.37

• solution containing the Al3+ ions had an acid pH value of 0.45 [1]. Obtaining boehmite (γ-AlO(OH)) The pH value was modified to obtain the boehmite phase by adding sodium hydroxide (NaOH) until pH 8. After precipitation, the oxide hydroxide was vacuum filtered and oven-dried at 70 °C [1][13]. Boehmite

Evaluation of electrosynthesized reduced graphene oxide–Ni/Fe/Co-based (oxy)hydroxide catalysts towards the oxygen evolution reaction

• Karolina Cysewska,
• Marcin Łapiński,
• Marcin Zając,
• Jakub Karczewski,
• Piotr Jasiński and
• Sebastian Molin

Beilstein J. Nanotechnol. 2023, 14, 420–433, doi:10.3762/bjnano.14.34

• 1 M KOH (Stanlab, pH ≈13.9). Before each electrochemical experiment, the electrode was stabilized during cyclic voltammetry (CV) by sweeping the potential from 1.1 to 1.6 V vs RHE for at least 20 cycles with a scan rate of 100 mV·s−1. Linear scan voltammetry (LSV) was performed from 1.1 to 2 V vs

Plasmonic nanotechnology for photothermal applications – an evaluation

• A. R. Indhu,
• L. Keerthana and
• Gnanaprakash Dharmalingam

Beilstein J. Nanotechnol. 2023, 14, 380–419, doi:10.3762/bjnano.14.33

Quercetin- and caffeic acid-functionalized chitosan-capped colloidal silver nanoparticles: one-pot synthesis, characterization, and anticancer and antibacterial activities

• Akif Hakan Kurt,
• Elif Berna Olutas,
• Fatma Avcioglu,
• Hamza Karakuş,
• Mehmet Ali Sungur,
• Cansu Kara Oztabag and
• Muhammet Yıldırım

Beilstein J. Nanotechnol. 2023, 14, 362–376, doi:10.3762/bjnano.14.31

• potentials, both regarding sign and numbers, clearly reveals that the stability of the NPs has changed significantly. Various studies have reported that in cell culture medium, there are pH-induced changes of NP conformation, particle size, stability, and functionality. Therefore, the nature of the cell

• activities against multidrug-resistant E. coli strains when compared to Ag NPs or quercetin treatments [78]. Here, factors such as low NP concentrations, high bacterial concentration, nanoparticle size, and ambient pH may have played a role in obtaining such low antibacterial inhibition results. Furthermore

Bismuth-based nanostructured photocatalysts for the remediation of antibiotics and organic dyes

• Akeem Adeyemi Oladipo and
• Faisal Suleiman Mustafa

Beilstein J. Nanotechnol. 2023, 14, 291–321, doi:10.3762/bjnano.14.26

• pH value of the effluent, the dosage of the photocatalyst, the initial concentration of the target pollutant, the dosage of oxidants, and the type of light source. To lower the overall cost of water treatment, the photocatalyst must be effective under all types of light, including direct sunlight, UV

• light, and simulated sunlight. Several Bi-based photocatalysts are visible-light-driven because of the bandgap, making them useful in a variety of situations. The solution pH value is a critical parameter when it comes to the photocatalytic degradation of textile dyes and antibiotics. The point of zero

• charge (pHpzc) of the photocatalysts, the effluent matrices, and the speciation of the target pollutants at various pH values all affect how well the photocatalytic process degrades pollutants. To avoid additional cost associated with pH adjustment of the effluent, an effective photocatalyst needs to

Biocatalytic synthesis and ordered self-assembly of silica nanoparticles via a silica-binding peptide

• Mustafa Gungormus

Beilstein J. Nanotechnol. 2023, 14, 280–290, doi:10.3762/bjnano.14.25

• molecular crowding-like effects, preventing efficient assembly of the particles. Therefore, tailoring intermolecular interactions between nanoparticles by modifying the particle surfaces or through external influences such as temperature, pH value, templates, and magnetic or flow fields, is important to

• achieved by reducing the negative surface charge of the SiO2 particles. The surface of the SiO2 particles is negatively charged above pH 2–3 [39][40]. Therefore, the as-synthesized particles exhibit little cohesion because of electrostatic repulsion. Usually, a post-assembly sintering process or long

Recent progress in cancer cell membrane-based nanoparticles for biomedical applications

• Qixiong Lin,
• Yueyou Peng,
• Yanyan Wen,
• Xiaoqiong Li,
• Donglian Du,
• Weibin Dai,
• Wei Tian and
• Yanfeng Meng

Beilstein J. Nanotechnol. 2023, 14, 262–279, doi:10.3762/bjnano.14.24

• anticancer effects [76]. After QT was delivered to tumor tissue by the active targeting ability of the membrane, the sensitivity to radiotherapy was effectively improved, and a strong anticancer effect was exerted under X-ray irradiation [76]. Gong et al. designed a pH-responsive multifunctional biomimetic

• , it has also been demonstrated that cell membrane coating does not affect the ability to generate ROS during treatment [82]. Tumor growth and progression are accompanied by an abnormal microenvironment (e.g., low pH, local hypoxia, overexpression of glutathione (GSH), and high levels of H2O2) [39

• middle cerebral artery occlusion rats. The infarct area of rats treated with 4T1 breast cancer membrane-coated pH-sensitive polymeric nanoparticles loaded with succinobucol (MPP/SCB) was significantly reduced on T2W MRI compared with bare nanoparticles (PP/SCB) and saline (tMCAO). (a) Experimental

Nanotechnology – a robust tool for fighting the challenges of drug resistance in non-small cell lung cancer

• Filip Gorachinov,
• Fatima Mraiche,
• Diala Alhaj Moustafa,
• Ola Hishari,
• Yomna Ismail,
• Jensa Joseph,
• Maja Simonoska Crcarevska,
• Marija Glavas Dodov,
• Nikola Geskovski and
• Katerina Goracinova

Beilstein J. Nanotechnol. 2023, 14, 240–261, doi:10.3762/bjnano.14.23

• , the pH-responsive linker between HA and PEG is hydrolyzed, leading to the cleavage of the HA layer. This, in turn, decreases the NP size and enables faster tumor diffusion, improved internalization, and drug release at the site of action. These nanocarriers exhibited a high degree of tumor homing, low

• toxicity, and efficient tumor inhibition in vitro and in a tumor mouse model [97]. An additional example of multilayered cleavable pH-responsive nanoparticles for KRAS mutated cancer is described in Table 2. Multistage drug delivery systems: Multistage nanocarriers address the issue of heterogenous

• )-functionalized nanoporous silica particles loaded with a poly(ʟ-glutamic acid) pH-cleavable linker–doxorubicin conjugate, which self-assembles into NPs after its release from the iNPG [114]. Li et al. designed a multistage nanocarrier for NSCLC targeting, composed of icotinib-loaded amphiphilic chitosan micelles

Cyclodextrins as eminent constituents in nanoarchitectonics for drug delivery systems

• Makoto Komiyama

Beilstein J. Nanotechnol. 2023, 14, 218–232, doi:10.3762/bjnano.14.21

• drugs to the target site but can be rather easily dissociated at the target site through a small perturbation. Hence, by applying photoirradiation, temperature increase, pH change, or other stimuli to CyD-based nanoarchitectures, the encapsulated drug can be released at required timing for on-demand

• glutathione and the pH decrease [100]. In order to deliver DOX to the cell nuclei, water-soluble conjugates of β-CyD with C60 fullerene have been employed [101]. CyDs are also useful for the treatment of COVID-19, which has been spreading all over the world as pandemic [102][103][104]. For example, remdesivir

• recognized by the molecularly imprinted β-CyD polymer. By extending this concept, a pH-responsive hydrogel was prepared [114]. Conclusion CyDs are easily obtainable at low cost and show many unique properties required for the application to medicinal purposes. CyDs are characterized by (1) a preorganized

A distributed active patch antenna model of a Josephson oscillator

• Vladimir M. Krasnov

Beilstein J. Nanotechnol. 2023, 14, 151–164, doi:10.3762/bjnano.14.16

• mV. This yields, Rn = 20 mΩ, C = 44.25 pF, Λ = 272.6 nm, inductance L* = μ0Λa/b = 3.43 pH, and c0/c = 2.71 × 10−2. Surface resistance Within the two-fluid model, the surface resistance of two superconducting electrodes can be written as [41]: Here, σn is the normal state conductivity. This

Batch preparation of nanofibers containing nanoparticles by an electrospinning device with multiple air inlets

• Dong Wei,
• Chengwei Ye,
• Adnan Ahmed and
• Lan Xu

Beilstein J. Nanotechnol. 2023, 14, 141–150, doi:10.3762/bjnano.14.15

• force (Ph) caused by the fluctuation height of spinning solution, surface tension (Ps) of the spinning solution, and electric field force (PE) produced by the applied voltage. These forces determine whether a jet could be formed at point A. The polymer fluid surface tension would make the liquid surface

Antimicrobial and mechanical properties of functionalized textile by nanoarchitectured photoinduced Ag@polymer coating

• Jessica Plé,
• Marine Dabert,
• Helene Lecoq,
• Sophie Hellé,
• Lydie Ploux and
• Lavinia Balan

Beilstein J. Nanotechnol. 2023, 14, 95–109, doi:10.3762/bjnano.14.11

• composed of 0.1 M KH2PO4, 20 wt % (NH4)2SO4, 0.1 wt % FeSO4, 20 wt % MgSO4, 6 M KOH, 0.05 wt % vitamin B1 and 10 wt % glucose; pH adjusted at 6.8; all products purchased by Sigma-Aldrich) were prepared [41], before undergoing an overnight incubation at 30 °C and 37 °C, respectively. The as-prepared pre

Solvent-induced assembly of mono- and divalent silica nanoparticles

• Bin Liu,
• Etienne Duguet and
• Serge Ravaine

Beilstein J. Nanotechnol. 2023, 14, 52–60, doi:10.3762/bjnano.14.6

• open air at room temperature and the grids were placed in a box protected from dust. Statistics from image analysis were performed over at least 300 multipods or 200 chains. The ζ potential value of 1-PSN aqueous dispersions (pH ≈5.7) was measured using the Malvern Zetasizer 3000 HS setup (Malvern