A nonenzymatic reduced graphene oxide-based nanosensor for parathion

• Sarani Sen,
• Anurag Roy,
• Ambarish Sanyal and
• Parukuttyamma Sujatha Devi

Beilstein J. Nanotechnol. 2022, 13, 730–744, doi:10.3762/bjnano.13.65

• nanoribbons doped with silver nanoparticles, rGO doped with ZrO2, and CuO–TiO2 hybrid nanocomposites were proposed to detect methyl parathion [19][20][21][22]. Rajaji et al. (2019) modified glassy carbon electrodes with graphene oxide encapsulated 3D porous chalcopyrite (CuFeS2) nanocomposites to detect

Reliable fabrication of transparent conducting films by cascade centrifugation and Langmuir–Blodgett deposition of electrochemically exfoliated graphene

• Teodora Vićentić,
• Stevan Andrić,
• Vladimir Rajić and
• Marko Spasenović

Beilstein J. Nanotechnol. 2022, 13, 666–674, doi:10.3762/bjnano.13.58

• substrates with dimensions of ca. 2 cm × 1 cm (Figure 2a). Although a great number of different types of substrate materials have been used, such as silica [37], chromium [38], tin [39], silver [40], or platinum [41], glass substrates were used in this paper. Glass is generally a popular choice, not just

Antibacterial activity of a berberine nanoformulation

• Hue Thi Nguyen,
• Tuyet Nhung Pham,
• Anh-Tuan Le,
• Nguyen Thanh Thuy,
• Tran Quang Huy and
• Thuy Thi Thu Nguyen

Beilstein J. Nanotechnol. 2022, 13, 641–652, doi:10.3762/bjnano.13.56

• types of nanoformulations, such as polymer-, lipid-, dendrimer-, graphene-, gold-, or silver-based nanoparticles, have been used for the delivery of BBR [29][30][31]. Yu et al. [29] prepared poly(ethylene glycol)–lipid–poly(lactic-co-glycolic acid) nanoparticles loaded with BBR to improve the oral

Sodium doping in brookite TiO₂ enhances its photocatalytic activity

• Boxiang Zhuang,
• Honglong Shi,
• Honglei Zhang and
• Zeqian Zhang

Beilstein J. Nanotechnol. 2022, 13, 599–609, doi:10.3762/bjnano.13.52

• increased due to its importance for photocatalytic application. Ohtani et al. reported that extra-fine brookite TiO2 exhibited good photocatalytic activity for redox reactions in aqueous propan-2-ol and silver sulfate solution [7]. Kobayashi et al. suggested that the photoactivity of brookite nanoparticles

Zinc oxide nanostructures for fluorescence and Raman signal enhancement: a review

• Ioana Marica,
• Fran Nekvapil,
• Maria Ștefan,
• Cosmin Farcău and
• Alexandra Falamaș

Beilstein J. Nanotechnol. 2022, 13, 472–490, doi:10.3762/bjnano.13.40

Controllable two- and three-state magnetization switching in single-layer epitaxial Pd_1−xFe_x films and an epitaxial Pd_0.92Fe_0.08/Ag/Pd_0.96Fe_0.04 heterostructure

• Igor V. Yanilkin,
• Amir I. Gumarov,
• Gulnaz F. Gizzatullina,
• Roman V. Yusupov and
• Lenar R. Tagirov

Beilstein J. Nanotechnol. 2022, 13, 334–343, doi:10.3762/bjnano.13.28

• the silver layer. All AMR and VSM experiments were carried out with the PPMS-9 system (Quantum Design). Results Сurrent along the [100] direction We start with the presentation of the results for a sample S00 of the Pd0.92Fe0.08 film where the electrical current flowed along the [100] direction of the

• PdFe1 and PdFe2 layers. It is achieved by introducing the non-magnetic spacer layer N of silver satisfying the epitaxial growth conditions. The different coercive fields were obtained choosing the Pd0.92Fe0.08 and Pd0.96Fe0.04 compositions for the ferromagnetic PdFe1 and PdFe2 layers [18]. Figure 6

Engineered titania nanomaterials in advanced clinical applications

• Padmavati Sahare,
• Paulina Govea Alvarez,
• Juan Manual Sanchez Yanez,
• Gabriel Luna-Bárcenas,
• Samik Chakraborty,
• Sujay Paul and
• Miriam Estevez

Beilstein J. Nanotechnol. 2022, 13, 201–218, doi:10.3762/bjnano.13.15

• (GNP2) presented good osseointegration [61]. In another recent study, TiO2 nanotubes (TNT) were grown on the surface of medical-grade titanium alloy and then coated with silver nps (Ag nps) to improve the antimicrobial properties of the implants. Moreover, to avoid direct contact of Ag nps with human

• TiO2 nps to kill even desiccation-resistant microbes, their value has increased in the food, cosmetic, and drug industries. Recently, glass surfaces coated with silver and TiO2 nps showed promising results against bacteria S. aureus (Gram positive) and E. coli (Gram negative) as compared to the

• -doped titania nps and undoped titania nps. Interestingly, polyester fabric modified by silver-doped TiO2 nps showed the best bactericidal property [98]. Huppmann et al. designed an antimicrobial polymer for medical and sanitary applications using TiO2 nps as a filler in a medical-grade polypropylene (PP

Sputtering onto liquids: a critical review

• Anastasiya Sergievskaya,
• Adrien Chauvin and
• Stephanos Konstantinidis

Beilstein J. Nanotechnol. 2022, 13, 10–53, doi:10.3762/bjnano.13.2

• research papers for almost 20 years until 1996 when two research groups reported SoL experiments. Ye et al. studied the formation of silver films on the surface of silicon oil [10] while Wagener et al. prepared silver and aluminium NPs by deposition onto silicon oil using various experimental conditions

• his work stayed almost unnoticed. There had been no sufficient progress regarding the kinetics of NP formation during the 35 years after Takiyama’s work. Studies of pulse radiolysis reduction of silver (Ag) ions showed the presence of small ionic Agрz+ clusters (p = 2–9, z = 1–2) that grow and become

• nuclei of the final NPs [94][95]. Because silver clusters absorb light at different wavelengths than the surface plasmon resonance (SPR) band of Ag NPs (which is used for monitoring of NP growth kinetics by UV–vis spectroscopy) one can spot the induction period on the sigmoidal kinetic curves. Noteworthy

Self-assembly of amino acids toward functional biomaterials

• Huan Ren,
• Lifang Wu,
• Lina Tan,
• Yanni Bao,
• Yuchen Ma,
• Yong Jin and
• Qianli Zou

Beilstein J. Nanotechnol. 2021, 12, 1140–1150, doi:10.3762/bjnano.12.85

• , the substrate affinity of metal nanoparticles (1.53 mM) is comparable to that of natural lipase (1.27 mM). Metal ions, especially silver ions (Ag+), have been widely studied regarding antibacterial, antifungal, antiviral, anti-inflammatory, anti-angiogenic, and antitumor activities [63][64]. Silver

• metallohydrogels showed fewer toxicological side effects and were highly biocompatible than Ag+ in the administered dosage range. Furthermore, Fmoc-amino acid metallohydrogels tested under the same conditions showed significantly better wound healing than silver sulfadiazine cream and the control group. It has

Assessment of the optical and electrical properties of light-emitting diodes containing carbon-based nanostructures and plasmonic nanoparticles: a review

• Keshav Nagpal,
• Erwan Rauwel,
• Frédérique Ducroquet and
• Protima Rauwel

Beilstein J. Nanotechnol. 2021, 12, 1078–1092, doi:10.3762/bjnano.12.80

• OLED has also been reported owing to the SPR of AgNP with an average size of 80 nm [48]. Silver nanoparticles were embedded in a PEDOT:PSS layer within the follwing device configuration: ITO (150 nm)/PEDOT:PSS (60 ± 10 nm)/AgNP/Alq3 (100 nm)/LiF (1 nm)/Al (100 nm). The PL emission intensity at 535 nm

The role of deep eutectic solvents and carrageenan in synthesizing biocompatible anisotropic metal nanoparticles

• Nabojit Das,
• Akash Kumar and
• Raja Gopal Rayavarapu

Beilstein J. Nanotechnol. 2021, 12, 924–938, doi:10.3762/bjnano.12.69

• utilizing safe nanomaterials for advanced biomedical and clinical applications. Keywords: anisotropic nanoparticles; carrageenan; cytotoxicity; eutectic solvents; surfactants; Review Introduction Plasmonic metals such as gold and silver, upon achieving nanoscale dimensions, exhibit unusual physicochemical

• of gold and silver nanoparticles. Surface plasmon resonance is an inherent property of plasmonic metal nanoparticles that is immensely employed as a tool for theranostics and is highly influenced by the size and shape of the nanoparticle [2]. The property of SPR has also been exploited for nanochips

• successful use in biological milieus. Recent studies indicated that the green synthesis of nanoparticles, such as zinc oxide nanoparticles and bimetallic copper–silver and nickel–cobalt nanoparticles, is preferred for catalytic, antibacterial, and therapeutic applications [12][13][14]. Several other

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

• the electrostatic interaction between analyte molecules and silver nanoparticles (Ag NPs) on the intensity of surface-enhanced Raman scattering (SERS). For this, we fabricated nanostructured plasmonic films by immobilization of Ag NPs on glass plates and functionalized them by a set of differently

• ; oligonucleotides; porphyrin; silver nanoparticles; substrate modification; surface-enhanced Raman spectroscopy (SERS); Introduction Surface-enhanced Raman scattering (SERS) with its advantages of extreme sensitivity, high selectivity, and non-destructive nature has demonstrated great potential for the quick

• molecules cannot access the “hot spots”. To address this problem, various techniques have been developed to capture non-adsorbing molecules on SERS-active surfaces [3][18][19][20]. Among various plasmonic materials, silver SERS substrates provide the strongest Raman enhancement for the same structure [8

The role of convolutional neural networks in scanning probe microscopy: a review

• Ido Azuri,
• Irit Rosenhek-Goldian,
• Neta Regev-Rudzki,
• Georg Fantner and
• Sidney R. Cohen

Beilstein J. Nanotechnol. 2021, 12, 878–901, doi:10.3762/bjnano.12.66

• image types was achieved, such as in images of cells and worms, enabling efficient cell-counting and viability prediction, as well as of silver nanowires. Image classification and segmentation CNNs are popular for cell classification. A CNN model based on actin-labeled fluorescence microscopy images

Comprehensive review on ultrasound-responsive theranostic nanomaterials: mechanisms, structures and medical applications

• Sepand Tehrani Fateh,
• Lida Moradi,
• Elmira Kohan,
• Michael R. Hamblin and
• Amin Shiralizadeh Dezfuli

Beilstein J. Nanotechnol. 2021, 12, 808–862, doi:10.3762/bjnano.12.64

Silver nanoparticles nucleated in NaOH-treated halloysite: a potential antimicrobial material

• Yuri B. Matos,
• Rodrigo S. Romanus,
• Mattheus Torquato,
• Edgar H. de Souza,
• Rodrigo L. Villanova,
• Marlene Soares and
• Emilson R. Viana

Beilstein J. Nanotechnol. 2021, 12, 798–807, doi:10.3762/bjnano.12.63

• 10.3762/bjnano.12.63 Abstract Despite all recent advances in medical treatments, infectious diseases remain dangerous. This has led to intensive scientific research on materials with antimicrobial properties. Silver nanoparticles (Ag-NPs) are a well-established solution in this area. The present work

• studied the nucleation of silver on halloysite substrates modified by chemical treatment with NaOH. The resulting stabilized Ag-NPs were characterized by X-ray diffraction, transmission electron microscopy, and energy-dispersive X-ray spectroscopy. The nucleation was characterized by thermogravimetric

• antimicrobial, and that it is possible to imbue a polymeric matrix with the antimicrobial properties of Ag-NPs. Keywords: antimicrobial activity; DIO coating; halloysite; nanocomposites; silver nanoparticles; Introduction The number of people dying from bacterial infections has been significantly reduced with

Silver nanoparticles induce the cardiomyogenic differentiation of bone marrow derived mesenchymal stem cells via telomere length extension

• Khosro Adibkia,
• Ali Ehsani,
• Asma Jodaei,
• Ezzatollah Fathi,
• Raheleh Farahzadi and
• Mohammad Barzegar-Jalali

Beilstein J. Nanotechnol. 2021, 12, 786–797, doi:10.3762/bjnano.12.62

• possible combination of stem cells and nanotechnology in the treatment of diseases. This study aims to investigate the in vitro effect of silver nanoparticles (Ag-NPs) on the cardiomyogenic differentiation of bone marrow-derived mesenchymal stem cells (BM-MSCs) through detection of cardiac markers. For

• ; cardiomyogenic differentiation; silver nanoparticles; telomere length; Wnt3/β-catenin signaling pathway; Introduction Cardiac disorders that eventually lead to heart failure cause an increased loss of cardiac cells. There is strong evidence that the progression of heart failure is associated with reduction in

• attention. Novel nanomaterials are being developed to improve disease treatment processes via biopharmaceutical molecules as well as the surface treatment of biomaterials [8][9]. Among nanoparticles (NPs), silver nanoparticles (Ag-NPs) are successfully commercialized due to their well-known antiseptic

Recent progress in actuation technologies of micro/nanorobots

• Ke Xu and
• Bing Liu

Beilstein J. Nanotechnol. 2021, 12, 756–765, doi:10.3762/bjnano.12.59

• targeted drug delivery. Li et al. [19] designed a fish-like magnetic actuation micro/nanorobot with a passive gold segment as the head, two active nickel segments as the body, and one passive gold segment as the caudal fin, all connected by a flexible structure of porous silver. The swimming mode of the

• and two nickel arm segments connected by flexible porous silver hinges. The flexible porous silver segment makes the robot swing symmetrically. By magnetizing the nickel segment, the two arms of the robot can swing in different directions under the action of the oscillating magnetic field, realizing a

Fate and transformation of silver nanoparticles in different biological conditions

• Barbara Pem,
• Marija Ćurlin,
• Darija Domazet Jurašin,
• Valerije Vrček,
• Rinea Barbir,
• Vedran Micek,
• Raluca M. Fratila,
• Jesus M. de la Fuente and
• Ivana Vinković Vrček

Beilstein J. Nanotechnol. 2021, 12, 665–679, doi:10.3762/bjnano.12.53

• de Zaragoza, Zaragoza 50009, Spain Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Spain 10.3762/bjnano.12.53 Abstract The exploitation of silver nanoparticles (AgNPs) in biomedicine represents more than one third of their overall application

• vivo settings. Keywords: animal tissue; biological media; nanoparticle aggregation; nanoparticle dissolution; nanoparticle reformation; silver nanoparticles; Introduction The global consumption of silver nanoparticles (AgNPs) has been steadily increasing in the last decade and estimated to reach over

• Silver (nano) that insufficient data on AgNP physicochemical properties and toxicology in cosmetics hinder the health hazards caused by AgNPs [5]. Earlier, the Scientific Committee on Emerging and Newly Identified Health Risks (SCENIHR) raised questions on how different forms of Ag used in consumer and

A review of defect engineering, ion implantation, and nanofabrication using the helium ion microscope

• Frances I. Allen

Beilstein J. Nanotechnol. 2021, 12, 633–664, doi:10.3762/bjnano.12.52

High-yield synthesis of silver nanowires for transparent conducting PET films

• Gul Naz,
• Hafsa Asghar,
• Muhammad Ramzan,
• Muhammad Arshad,
• Rashid Ahmed,
• Muhammad Bilal Tahir,
• Bakhtiar Ul Haq,
• Nadeem Baig and
• Junaid Jalil

Beilstein J. Nanotechnol. 2021, 12, 624–632, doi:10.3762/bjnano.12.51

• & Optoelectronics Laboratory (AFMOL), Department of Physics, Faculty of Science, King Khalid University, Abha 9004, Saudi Arabia Center of Research Excellent in Desalination & Water Treatment, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia 10.3762/bjnano.12.51 Abstract Silver nanowires

• optoelectronics. Keywords: silver nanowires; high yield; visible luminescence; PET film; transmittance; sheet resistance; Introduction Several optoelectronic devices, such as solar cells, touch screens, LC displays, organic EL panels, light-emitting diodes, and organic light emitting diodes, use transparent

• to their greater tube–tube resistance and lower inherent carrier concentration [10]. Today, noble metal nanomaterials are extensively employed owing to their superior conduction properties [11]. Among them only silver nanowires (AgNWs) films outperform ITO films in term of transmittance and

Stability and activity of platinum nanoparticles in the oxygen electroreduction reaction: is size or uniformity of primary importance?

• Kirill O. Paperzh,
• Anastasia A. Alekseenko,
• Vadim A. Volochaev,
• Ilya V. Pankov,
• Olga A. Safronenko and
• Vladimir E. Guterman

Beilstein J. Nanotechnol. 2021, 12, 593–606, doi:10.3762/bjnano.12.49

• ) (Pine Research Instruments, USA). A saturated silver chloride electrode was used as a reference electrode. The potentials were given with regard to a reversible hydrogen electrode (RHE). A thin, porous catalyst layer was applied to the electrode using the so-called "catalytic ink". To obtain a

On the stability of microwave-fabricated SERS substrates – chemical and morphological considerations

• Limin Wang,
• Aisha Adebola Womiloju,
• Christiane Höppener,
• Ulrich S. Schubert and
• Stephanie Hoeppener

Beilstein J. Nanotechnol. 2021, 12, 541–551, doi:10.3762/bjnano.12.44

• on the SERS activity of the substrates and a carbonate buffer at pH 10 was found to even improve SERS performance. This study represents a guideline on the stability of microwave-fabricated SERS substrates or other SERS substrates consisting of non-stabilized silver nanoparticles for the application

• of different organic solvents and buffer solutions. Keywords: chemical stability; microwave synthesis; scanning electron microscopy; silver nanoparticles; surface-enhanced Raman spectroscopy; Introduction Surface-enhanced Raman spectroscopy (SERS) has been developed into a standard analytical tool

• Raman signals can be significantly improved when the measurements are performed on roughened silver electrodes [5], an understanding of the SERS enhancement process has been gained from a large number of investigations. This has rationalized the requirements for a good performance of SERS substrates

Surface-enhanced Raman scattering of water in aqueous dispersions of silver nanoparticles

• Paulina Filipczak,
• Krzysztof Hałagan,
• Jacek Ulański and
• Marcin Kozanecki

Beilstein J. Nanotechnol. 2021, 12, 497–506, doi:10.3762/bjnano.12.40

• Raman scattering (SERS) effect. In this work, we show the SERS effect for water molecules in the dispersion of silver nanoparticles (AgNPs) without any external electrical field. An enhancement factor was estimated to be (4.8 ± 0.8) × 106 for an excitation wavelength of 514.5 nm and for AgNPs with an

• effect weaker [20]. Silver nanoparticles (AgNPs) are gaining more and more popularity in various applications, such as electronics [22], photonics [23], and medicine [24]. Silver nanocolloids are also commonly used as an enhancing substrate in surface-enhanced Raman scattering (SERS) [25][26]. Since the

• , spontaneous and stimulated Raman surface enhancement of the signal of liquid water in an aqueous dispersion of silver nanoparticles [35]. High enhancement factors (in the magnitude of 106) were obtained for the results from both techniques. In this work, further investigations on the SERS effect for water

Rapid controlled synthesis of gold–platinum nanorods with excellent photothermal properties under 808 nm excitation

• Jialin Wang,
• Qianqian Duan,
• Min Yang,
• Boye Zhang,
• Li Guo,
• Pengcui Li,
• Wendong Zhang and
• Shengbo Sang

Beilstein J. Nanotechnol. 2021, 12, 462–472, doi:10.3762/bjnano.12.37

• is the formation of strong silver bromide complexes (in the form of either Ag(I)-Br−-CTA+ or simply as AgBr2−), which act as face-specific capping agents on the lateral facets of the AuNRs [34][35][36][37][38][39]. Considering the above two mechanisms, it can be stated that when the PtCl42−-CTAB

• increased further. This phenomenon may indicate that the increase in the quantity of Ag+ leads to the formation of more Ag0 or silver bromide complexes on the side of the AuNRs, which prevents the reduction of Pt to a greater extent, and Pt is mainly deposited on the tip at last. Above all, variations of

• Reagents Gold(III) chloride trihydrate (HAuCl4·3H2O), potassium tetrachloroplatinate(II) (K2PtCl4), silver nitrate (AgNO3), cetyltrimethylammonium bromide (CTAB), ascorbic acid, and sodium borohydride (NaBH4) were purchased from Sinopharm Chemical Reagent Co. Ltd. (Taiyuan, China). Deionized water was used

A review on nanostructured silver as a basic ingredient in medicine: physicochemical parameters and characterization

• Gabriel M. Misirli,
• Kishore Sridharan and
• Shirley M. P. Abrantes

Beilstein J. Nanotechnol. 2021, 12, 440–461, doi:10.3762/bjnano.12.36

• . Thenhipalam 673635, Kerala, India National Institute for Quality Control in Health, Oswaldo Cruz Foundation (INCQS, FIOCRUZ), Rio de Janeiro, RJ, Brazil 10.3762/bjnano.12.36 Abstract Recent studies with silver nanoparticles (AgNPs) and the history of silver metal as a broad-spectrum bactericidal and

• virucidal agent, places silver as one of the future biocidal candidates in the field of nanomedicine to eliminate bacteria and viruses, especially multidrug resistant ones. In this review, we have described the various morphologies of AgNPs and correlated the enhanced bactericidal activity with their

• prominent {111} facets. In addition to prioritizing the characterization we have also discussed the importance of quantifying AgNPs and silver ion content (Ag+) and their different mechanisms at the chemical, biological, pharmacological, and toxicological levels. The mechanism of action of AgNPs against