New application of bimetallic Ag/Pt nanoplates in a colorimetric biosensor for specific detection of E. coli in water

• Azam Bagheri Pebdeni,
• Mohammad N. AL-Baiati and
• Morteza Hosseini

Beilstein J. Nanotechnol. 2024, 15, 95–103, doi:10.3762/bjnano.15.9

• /Pt NPL. a) Absorbance spectra of Ag/Pt NPL after the addition of TMB, TMB and H2O2, NPL, and aptamer-NPL in the presence of TMB-H2O2. b) Image related to the color change of the proposed NPL, c) the zeta potential of NPL, aptamer-NPL, E. coli bacteria, and NPL-E. coli. a) The calibration curve of

Fluorescent bioinspired albumin/polydopamine nanoparticles and their interactions with Escherichia coli cells

• Eloïse Equy,
• Jordana Hirtzel,
• Sophie Hellé,
• Béatrice Heurtault,
• Eric Mathieu,
• Morgane Rabineau,
• Vincent Ball and
• Lydie Ploux

Beilstein J. Nanotechnol. 2023, 14, 1208–1224, doi:10.3762/bjnano.14.100

• protein and to determine whether they can enter and accumulate in bacterial cells. The investigation has been conducted with NPs made of polydopamine (PDA) and bovine serum albumin (BSA), and Escherichia coli (E. coli) bacteria as a bacterial model. Three different types of fluorescent BSA/PDA NPs have

Recognition mechanisms of hemoglobin particles by monocytes – CD163 may just be one

• Jonathan-Gabriel Nimz,
• Pichayut Rerkshanandana,
• Chiraphat Kloypan,
• Ulrich Kalus,
• Saranya Chaiwaree,
• Axel Pruß,
• Radostina Georgieva,
• Yu Xiong and
• Hans Bäumler

Beilstein J. Nanotechnol. 2023, 14, 1028–1040, doi:10.3762/bjnano.14.85

• % FITC-positive monocytes indicated an intact monocytic phagocytosis capacity. Pre-feeding the cells with HbMPs limited the uptake of FITC-labeled E. coli bacteria and resulted in an MFI reduction to 45.2% ± 3.7% of the reference value. In further samples, the monocytic surface antigens CD14, CD33, CD163

• for 10 min at 37 °C right away. An MFI value in flow cytometry close to the one of the reference sample showed that neither one of the antibodies we used had an effect on the uptake of FITC-labeled E. coli bacteria (Figure 4). Discussion Indirect phagocytosis assays were carried out with whole blood

• tested receptors showed an inhibitory effect on the uptake of HbMPs compared to unopposed HbMP uptake (HbMP-prefed-30′), as illustrated in Figure 3. As a measure to rule out confounders, we tested for the non-interference of the antibodies on the ability of monocytes to take up FITC-labeled E. coli

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

• nanocomposites exhibited remarkable microbial growth inhibitory effects. Keywords: antimicrobial properties; C. albicans fungus; E. coli bacteria; photoinduced functionalized textile; silver/polymer nanomaterials; Introduction The proliferation of microorganisms is a major concern for health organizations

• being glued to the glass dishes. For this reason, antimicrobial characterizations were only carried out on Ag@PEG600DA/PETIA loaded with 3 wt % and 5 wt % of AgNO3 in order to observe the impact of the silver concentration on the E. coli bacteria and the C. albicans fungus. Liquid diffusion assay

• growth (Figure 12b). It should be noted that the required silver quantity to effectively inhibit microorganism growth is lower for C. albicans fungus (≈10 µg/g) than for E. coli bacteria (≈15 µg/g), which enables a faster growth inhibition of the fungi. In addition, the response of C. albicans to doses

Green synthesis of zinc oxide nanoparticles toward highly efficient photocatalysis and antibacterial application

• Vo Thi Thu Nhu,
• Nguyen Duy Dat,
• Le-Minh Tam and
• Nguyen Hoang Phuong

Beilstein J. Nanotechnol. 2022, 13, 1108–1119, doi:10.3762/bjnano.13.94

• with ZnO NPs doses of 1, 5, and 10 mg/mL and contact time intervals of 1, 3, and 6 h. The ZnO NP concentration of 1 mg/mL is not enough to inhibit all E. coli bacteria after 6 h of treatment. By increasing the concentration of ZnO NPs to 5 mg/mL at contact times of 3 and 6 h, the inhibitory efficiency

• reached 99.83 and 100%, respectively. When the dose of the photocatalyst increased to 10 mg/mL, the E. coli inhibition efficiency reached 99.35% with a contact time of 1 h and the efficiency was 100% when the contact time was 3 h. The results of E. coli bacteria inhibition by ZnO NPs synthesized by the

• . The E. coli bacteria with concentrations of 105 and 104 CFU/mL was almost completely destroyed after 6 h by ZnO with concentrations of 1, 5, and 10 mg/mL. Schematic illustration of the synthesis of ZnO nanoparticles. DTA/TG diagram of the zinc resinate sample. XRD diagram of ZnO NPs. FESEM image of

Recent advances in green carbon dots (2015–2022): synthesis, metal ion sensing, and biological applications

• Aisha Kanwal,
• Naheed Bibi,
• Sajjad Hyder,
• Arif Muhammad,
• Hao Ren,
• Jiangtao Liu and
• Zhongli Lei

Beilstein J. Nanotechnol. 2022, 13, 1068–1107, doi:10.3762/bjnano.13.93

Bioselectivity of silk protein-based materials and their bio-inspired applications

• Hendrik Bargel,
• Vanessa T. Trossmann,
• Christoph Sommer and
• Thomas Scheibel

Beilstein J. Nanotechnol. 2022, 13, 902–921, doi:10.3762/bjnano.13.81

• composition, surface structuring on the micro-/nanoscale, and the introduction of low-surface-energy compounds [62]. Various studies demonstrated that the adhesion of Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli (E. coli) bacteria was significantly reduced on superhydrophobic coatings

Bacterial safety study of the production process of hemoglobin-based oxygen carriers

• Axel Steffen,
• Yu Xiong,
• Radostina Georgieva,
• Ulrich Kalus and
• Hans Bäumler

Beilstein J. Nanotechnol. 2022, 13, 114–126, doi:10.3762/bjnano.13.8

• substances were combined with one another in further experiments. It should be investigated whether the effect of the two substances can cancel or strengthen each other. The concentrations of GA and EDTA corresponded to those used in the fabrication process. The results are shown in Figure 5. When E. coli

• bacteria were cultured with the addition of EDTA and GA at room temperature for 1 h, there was no increase in optical density and thus no growth of bacteria (Figure 5A). In contrast, control cells grew normally. In the corresponding growth experiments with S. epidermidis, there was also no increase in

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

• -stranded PIC, this solution was heated to 55 °C then cooled back to room temperature according to the instructions from the manufacturer. As DNA plasmids, GFP plasmids (16542: pBI-MCS-EGFP) were purchased from Addgen, propagated in DH5α competent E. coli bacteria, and purified using the QIAGEN EndoFree

Imaging of SARS-CoV-2 infected Vero E6 cells by helium ion microscopy

• Natalie Frese,
• Patrick Schmerer,
• Martin Wortmann,
• Matthias Schürmann,
• Matthias König,
• Michael Westphal,
• Friedemann Weber,
• Holger Sudhoff and
• Armin Gölzhäuser

Beilstein J. Nanotechnol. 2021, 12, 172–179, doi:10.3762/bjnano.12.13

• field of cell biology for imaging various human and animal cells. These include cartilage [2], cancer [3], liver [4], kidney [5] and stem cells [6], as well as fibrin fibers [7]. To visualize viruses and their host organisms, HIM has so far been applied to image T4 phage-infected E. coli bacteria [8

Bio-imaging with the helium-ion microscope: A review

• Matthias Schmidt,
• James M. Byrne and
• Ilari J. Maasilta

Beilstein J. Nanotechnol. 2021, 12, 1–23, doi:10.3762/bjnano.12.1

• nanopillar texture on the wing of a dragonfly Orthetrum villosovittatum was studied. In addition to imaging the wing alone, samples were prepared with E. coli bacteria on them, to study the bactericidal properties of the nanostructure. Along similar lines, the nanostructures on the wings of three different

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

• . The local photothermal effect triggered by the NIR irradiation of PVA-GNS films was highly efficient in eliminating E. coli bacteria, as shown in Figure 4. In a very recent study, the antimicrobial activity of a chitosan-based hydrogel with embedded gold nanorods under low-power (200 mW) diode laser

Gram-scale synthesis of splat-shaped Ag–TiO₂ nanocomposites for enhanced antimicrobial properties

• Mohammad Jaber,
• Asim Mushtaq,
• Kebiao Zhang,
• Jindan Wu,
• Dandan Luo,
• Zihan Yi,
• M. Zubair Iqbal and
• Xiangdong Kong

Beilstein J. Nanotechnol. 2020, 11, 1119–1125, doi:10.3762/bjnano.11.96

• Gram-negative (E. coli) bacteria. Pure TiO2 nanoparticles and Ag–TiO2 nanocomposites showed clear inhibition zones of 3 mm, 4 mm, 14 mm and 19 mm against the Gram-negative E. coli bacteria (Figure 5b and c, respectively). In addition, 4 mm, 6 mm, 12 mm, and 19 mm inhibition zones were developed against

Facile biogenic fabrication of hydroxyapatite nanorods using cuttlefish bone and their bactericidal and biocompatibility study

• Satheeshkumar Balu,
• Manisha Vidyavathy Sundaradoss,
• Swetha Andra and
• Jaison Jeevanandam

Beilstein J. Nanotechnol. 2020, 11, 285–295, doi:10.3762/bjnano.11.21

• (S. aureus) and gram-negative (E. coli) bacteria. Acknowledgements The authors would like to thank the head of the Department of Animal Biotechnology for utilizing biocompatibility assessment facilities at TANUVAS, Veppery, Chennai-07.

New micro/mesoporous nanocomposite material from low-cost sources for the efficient removal of aromatic and pathogenic pollutants from water

• Emmanuel I. Unuabonah,
• Robert Nöske,
• Jens Weber,
• Christina Günter and
• Andreas Taubert

Beilstein J. Nanotechnol. 2019, 10, 119–131, doi:10.3762/bjnano.10.11

• -nitrophenol and E. coli bacteria, we prepared an initial set of materials with MgCl2 and ZnCl2 at a reaction temperature of 500 °C. Figure 1a shows the nitrogen sorption isotherms of 1M-HYCA, 1Z-HYCA, and 2Z-HYCA (see experimental part for sample labels). The shape of the isotherms suggests the presence of

Noble metal-modified titania with visible-light activity for the decomposition of microorganisms

• Maya Endo,
• Zhishun Wei,
• Kunlei Wang,
• Baris Karabiyik,
• Kenta Yoshiiri,
• Paulina Rokicka,
• Bunsho Ohtani,
• Agata Markowska-Szczupak and
• Ewa Kowalska

Beilstein J. Nanotechnol. 2018, 9, 829–841, doi:10.3762/bjnano.9.77

• (right) as a reference. SEM images of the decomposition of bacterial cells under vis (λ > 420 nm) irradiation on Ag/TiO2(ST41) photocatalyst. Number of E. coli bacteria (closed symbols) and evolution of CO2 (open symbols) during inactivation of bacterial cells in the dark (grey symbols) and under vis

BN/Ag hybrid nanomaterials with petal-like surfaces as catalysts and antibacterial agents

• Konstantin L. Firestein,
• Denis V. Leybo,
• Alexander E. Steinman,
• Andrey M. Kovalskii,
• Andrei T. Matveev,
• Anton M. Manakhov,
• Irina V. Sukhorukova,
• Pavel V. Slukin,
• Nadezda K. Fursova,
• Sergey G. Ignatov,
• Dmitri V. Golberg and
• Dmitry V. Shtansky

Beilstein J. Nanotechnol. 2018, 9, 250–261, doi:10.3762/bjnano.9.27

• associated with the appearance of bacterial cell resistivity to low Ag+ ion concentration. Then, the antibacterial activity of the BN/Ag HNMs was evaluated against planktonic E. coli bacteria. After incubation for 3 h, the number of CFUs in the presence of both types of BN/Ag HNMs decreased to zero (Figure

• control sample, there is no biofilm formation on the surface of CVD and UV BN/Ag HNMs (Figure 9e). Thus, our data demonstrate that both types of BN/Ag HNMs possess a strong antibacterial effect against E. coli bacteria and inhibit the early stage of biofilm formation. Despite a broad spectrum of

Antimicrobial properties of CuO nanorods and multi-armed nanoparticles against B. anthracis vegetative cells and endospores

• Pratibha Pandey,
• Merwyn S. Packiyaraj,
• Himangini Nigam,
• Gauri S. Agarwal,
• Beer Singh and
• Manoj K. Patra

Beilstein J. Nanotechnol. 2014, 5, 789–800, doi:10.3762/bjnano.5.91

• , generated on copper foil as effective antibacterial against E. coli bacteria when the bacterial suspension drop was tested on these surfaces. Perelshtein et al. [19] have reported antibacterial CuO-cotton textile against E. coli and S. aureus. Gao et al. [20] reported strong antibacterial activity of CuO

• against gram-positive B. anthracis vegetative cells almost comparable to that against nonsporigenic gram-negative E. coli bacteria. The CuO nanoparticles demonstrated a significantly higher bactericidal activity in comparison to bulk CuO microparticles. The spores however showed more resistance towards

• and spores B. anthracis and E. coli bacteria were grown in nutrient broth in an incubator shaker at 37 °C overnight and were used for evaluation of nanoparticles in broth culture test. Standard cultures of the bacteria B. anthracis Sterne and E. coli were sourced from the High Containment Facility of

Photocatalytic antibacterial performance of TiO₂ and Ag-doped TiO₂ against S. aureus. P. aeruginosa and E. coli

• Kiran Gupta,
• R. P. Singh,
• Ashutosh Pandey and
• Anjana Pandey

Beilstein J. Nanotechnol. 2013, 4, 345–351, doi:10.3762/bjnano.4.40

• investigated against Gram-positive Staphylococcus aureus (S. aureus), and Gram-negative Pseudomonas aeruginosa (P. aeruginosa) and Escherichia coli (E. coli) bacteria under visible light. Results and Discussion XRD of TiO2 and Ag-doped TiO2 The samples were annealed at 450 °C to achieve crystallization in TiO2