Microplastic pollution in Himalayan lakes: assessment, risks, and sustainable remediation strategies

• Sameeksha Rawat,
• S. M. Tauseef and
• Madhuben Sharma

Beilstein J. Nanotechnol. 2025, 16, 2144–2167, doi:10.3762/bjnano.16.148

• MPs. They are therefore ideal for use in high-altitude lakes [44]. The goal of chemical methods for MP remediation is to convert polymers into non-toxic substances. Advanced oxidation processes (AOPs) use strong oxidants like ozone, hydrogen peroxide, or hydroxyl radicals to break down MPs [45]. The

• -altitude pH variability. 6 Nanomaterial applications in microplastic remediation 6.1 Role of photocatalysis in degradation Photocatalysis uses nanomaterials to break down MPs by converting light energy, often UV or visible light, into ROS. These ROS, which include superoxide anions and hydroxyl radicals

Rapid synthesis of highly monodisperse AgSbS₂ nanocrystals: unveiling multifaceted activities in cancer therapy, antibacterial strategies, and antioxidant defense

• Funda Ulusu,
• Adem Sarilmaz,
• Yakup Ulusu,
• Faruk Ozel and
• Mahmut Kus

Beilstein J. Nanotechnol. 2025, 16, 2105–2115, doi:10.3762/bjnano.16.145

• novel antimicrobial agents. Nanoparticle therapy is emerging as a prominent avenue toward that end [8]. Free radicals represent an important focus in pharmacological research. The severity of oxidative stress, defined as the imbalance between the formation of reactive oxygen/nitrogen species (ROS/RNS

• cascade of events leads to DNA breakage, heightened expression of death receptors, and ultimately culminates in apoptosis-driven cell death [10]. Therefore, nanoparticles can be considered as a medical agent in the treatment of various diseases that can be caused by free radicals, such as cancer

• ratio and enhanced surface reactivity [30]. These features, combined with the tunable surface chemistry of nanoparticles, allow for efficient interactions with free radicals and facilitate electron transfer reactions, resulting in robust antioxidant activity [49]. This activity involves scavenging free

Stereodiscrimination of guests in chiral organosilica aerogels studied by ESR spectroscopy

• Sebastian Polarz,
• Yasar Krysiak,
• Martin Wessig and
• Florian Kuhlmann

Beilstein J. Nanotechnol. 2025, 16, 2034–2054, doi:10.3762/bjnano.16.140

• , one is able to gather information about transport processes happening at 1–3 nm. If one selects an appropriate spin probe, the ESR spectra contain much valuable information. Line shape analysis and spin relaxation times can provide information on the motion and reactivity of trapped radicals. This can

• distance of ≈4 nm between the surface-attached radicals. It needs to be mentioned that the method of Ionita et al. [70] is sensitive only for very small distances below 5 nm; if distances between the spins are larger, the degree of dipolar coupling is too small to lead to notable changes in the ESR

Laser ablation in liquids for shape-tailored synthesis of nanomaterials: status and challenges

• Natalie Tarasenka

Beilstein J. Nanotechnol. 2025, 16, 1963–1997, doi:10.3762/bjnano.16.137

• hydrogen and peroxide radicals, as well as hydroxide and hydrogen ions that are changing the liquid parameters (such as pH) and can participate in the processes occurring with NPs during the later stages of growth, self-organization, and ageing. The produced reactive species might result in NP surface

• , but typically highly active species, such as radicals and ions, are formed. Their adsorption and reactions at the NP surface results in composition, shape, and structure transformations induced in NPs. As an example, Zhang et al. [30] explained the formation of Mn-doped Ni(OH)2 nanosheets, observed

• during Mn target ablation in a nickel chloride solution, by the involvement of hydrogen radicals, hydroxide ions, and hydroxyl groups reacting with Ni2+ ions. The authors state further shape transformation of the formed nanosheets into hierarchical spheres. In a similar process, Hunter et al. [51

Piezoelectricity of layered double hydroxides: perspectives regarding piezocatalysis and nanogenerators

• Evgeniy S. Seliverstov,
• Evgeniya A. Tarasenko and
• Olga E. Lebedeva

Beilstein J. Nanotechnol. 2025, 16, 1812–1817, doi:10.3762/bjnano.16.124

• biocompatibility might exhibit a piezoelectric effect under ultrasound irradiation and generate superoxide anion radicals [5]. The results confirmed the potential of the selected LDH for application in novel piezocatalytic tumor therapy as an effective sonosensitizer. The obtained data indicated that the

Electrical, photocatalytic, and sensory properties of graphene oxide and polyimide implanted with low- and medium-energy silver ions

• Josef Novák,
• Eva Štěpanovská,
• Petr Malinský,
• Vlastimil Mazánek,
• Jan Luxa,
• Ulrich Kentsch and
• Zdeněk Sofer

Beilstein J. Nanotechnol. 2025, 16, 1794–1811, doi:10.3762/bjnano.16.123

• ions are due to electronic stopping power (Se) and nuclear stopping power (Sn) [4]. Electronic stopping most often leads to the excitation of electrons to higher energy levels or to the ionization of the atoms and contributes to the formation of free radicals [21]. In contrast, nuclear stopping most

• formation of free radicals and their subsequent recombination [26]. The results obtained from the XPS analysis, in conjunction with the RBS findings, reveal a consistent trend indicative of ongoing carbonization processes occurring in the surface layers of the PI samples. The reduction in oxygen-containing

• consequently enhance the photocatalytic power [34]. Another process that may influence the photocatalytic degradation of rhodamine B is the presence of free radicals. Free radicals are generated during ion implantation in which the implanted ion significantly ionizes its surroundings, resulting in the

Exploring the potential of polymers: advancements in oral nanocarrier technology

• Rousilândia de Araujo Silva,
• Igor Eduardo Silva Arruda,
• Luise Lopes Chaves,
• Mônica Felts de La Roca Soares and
• Jose Lamartine Soares Sobrinho

Beilstein J. Nanotechnol. 2025, 16, 1751–1793, doi:10.3762/bjnano.16.122

• frequently involve non-biodegradable monomers, generate non-biocompatible byproducts, and require extensive purification to eliminate potentially toxic residues, thereby complicating scalability and regulatory compliance. Moreover, the use of free radicals or ultraviolet light to initiate polymerization

Multifunctional anionic nanoemulsion with linseed oil and lecithin: a preliminary approach for dry eye disease

• Niédja Fittipaldi Vasconcelos,
• Almerinda Agrelli,
• Rayane Cristine Santos da Silva,
• Carina Lucena Mendes-Marques,
• Isabel Renata de Souza Arruda,
• Priscilla Stela Santana de Oliveira,
• Mércia Liane de Oliveira and
• Giovanna Machado

Beilstein J. Nanotechnol. 2025, 16, 1711–1733, doi:10.3762/bjnano.16.120

• inhibition percentage) was calculated using Equation 2 [57]. The IC50 (the concentration required to achieve 50% inhibition) of the radical scavenging activity was determined via linear regression analysis [58]. where Abscontrol, represents the absorbance of the DPPH radicals, Abssample, represents the

Nanotechnology-based approaches for the removal of microplastics from wastewater: a comprehensive review

• Nayanathara O Sanjeev,
• Manjunath Singanodi Vallabha and
• Rebekah Rubidha Lisha Rabi

Beilstein J. Nanotechnol. 2025, 16, 1607–1632, doi:10.3762/bjnano.16.114

• generating highly reactive radicals through techniques such as Fenton and photo-Fenton reactions, UV/H2O2 systems, ozonation, TiO2, photocatalysis, and electrochemical oxidation [53]. These methods hold potential for breaking down MPs into smaller, less harmful by products, although optimization and

• pollutants adsorbed on its surface. In Fenton and Fenton-like processes, hydroxyl (•OH) radicals are formed when hydrogen peroxide reacts with a metallic active phase, such as Fe2+, facilitating the oxidation and breakdown of contaminants [58]. Table 2 depicts the advantages and limitations of various

• biological treatments aimed at removing organic contaminants [96]. In photocatalysis, under UV illumination, electron–hole pairs are generated. These pairs interact with water molecules and dissolved oxygen to generate reactive oxygen species, such as hydroxyl radicals and superoxide anions. These highly

Photocatalytic degradation of ofloxacin in water assisted by TiO₂ nanowires on carbon cloth: contributions of H₂O₂ addition and substrate absorbability

• Iram Hussain,
• Lisha Zhang,
• Zhizhen Ye and
• Jin-Ming Wu

Beilstein J. Nanotechnol. 2025, 16, 1567–1579, doi:10.3762/bjnano.16.111

• concentration were studied. The higher production of hydroxyl radicals (•OH) in the degradation of organic pollutants enhances the degradation efficiency of OFL. The TiO2 nanowires exhibited significant photodegradation of OFL in water with a high initial concentration range of 50–200 ppm, which is much higher

• beyond which the H2O2 additive contributes to OFL degradation. This dual behavior can be attributed to competing roles of H2O2 in advanced oxidation processes. At sub-critical concentrations, H2O2 may act as a scavenger of hydroxyl radicals (OH•) or holes (h+), reducing their availability for OFL

• degradation, as explained by (Equation 5): Above the critical concentration, H2O2 primarily serves as an electron acceptor (Equations 6 and 7), generating additional OH• radicals via reactions with superoxide radicals (O2•–) or photogenerated electrons (e–) [28], demonstrated by the subsequent reactions

Laser processing in liquids: insights into nanocolloid generation and thin film integration for energy, photonic, and sensing applications

• Akshana Parameswaran Sreekala,
• Pooja Raveendran Nair,
• Jithin Kundalam Kadavath,
• Bindu Krishnan,
• David Avellaneda Avellaneda,
• M. R. Anantharaman and
• Sadasivan Shaji

Beilstein J. Nanotechnol. 2025, 16, 1428–1498, doi:10.3762/bjnano.16.104

Ferroptosis induction by engineered liposomes for enhanced tumor therapy

• Alireza Ghasempour,
• Mohammad Amin Tokallou,
• Mohammad Reza Naderi Allaf,
• Mohsen Moradi,
• Hamideh Dehghan,
• Mahsa Sedighi,
• Mohammad-Ali Shahbazi and
• Fahimeh Lavi Arab

Beilstein J. Nanotechnol. 2025, 16, 1325–1349, doi:10.3762/bjnano.16.97

• a common biomarker of ferroptosis [22]. In general, ferroptosis begins with the Fenton reaction, in which unsaturated lipid molecules are oxidized by •OH radicals produced when iron ions and H2O2 are combined [28]. An iron-containing porphyrin molecule called hemin can also trigger ferroptosis

• site [88]. (III) Organic peroxides are chemical compounds with one or more oxygen bonds. The bond between the two oxygen atoms (O–O) can be easily disrupted, leading to the formation of alkoxy radicals (•RO). These organic peroxides are commonly employed to induce oxidative damage in cellular models

Better together: biomimetic nanomedicines for high performance tumor therapy

• Imran Shair Mohammad,
• Gizem Kursunluoglu,
• Anup Kumar Patel,
• Hafiz Muhammad Ishaq,
• Cansu Umran Tunc,
• Dilek Kanarya,
• Mubashar Rehman,
• Omer Aydin and
• Yin Lifang

Beilstein J. Nanotechnol. 2025, 16, 1246–1276, doi:10.3762/bjnano.16.92

Functional bio-packaging enhanced with nanocellulose from rice straw and cinnamon essential oil Pickering emulsion for fruit preservation

• Tuyen B. Ly,
• Duong D. T. Nguyen,
• Hieu D. Nguyen,
• Yen T. H. Nguyen,
• Bup T. A. Bui,
• Kien A. Le and
• Phung K. Le

Beilstein J. Nanotechnol. 2025, 16, 1234–1245, doi:10.3762/bjnano.16.91

• radicals [47]. The antioxidative performance of the films aligns with previous studies on essential oil-infused biopolymer matrices, confirming their potential to enhance food packaging stability by preventing oxidative degradation [48]. With increasing CEO concentration, transmittance decreased

• kept in the dark for 30 min. Measurements was performed using a 754 STECH INTERNATIONAL (China) UV–vis spectrophotometer at 517 nm. The DPPH radicals scavenging ability was calculated using (Equation 6): where Acontrol is the absorbance of the sample without the test substance, Asample is the

Hydrogels and nanogels: effectiveness in dermal applications

• Jéssica da Cruz Ludwig,
• Diana Fortkamp Grigoletto,
• Daniele Fernanda Renzi,
• Wolf-Rainer Abraham,
• Daniel de Paula and
• Najeh Maissar Khalil

Beilstein J. Nanotechnol. 2025, 16, 1216–1233, doi:10.3762/bjnano.16.90

• . (2017), the authors developed an innovative hydrogel that can be directly injected into the injured skin. The benefits associated with wound healing stand out: self-regeneration potential, antibacterial activity, neutralization of free radicals, high adhesion to the skin, and biocompatibility. These

Crystalline and amorphous structure selectivity of ignoble high-entropy alloy nanoparticles during laser ablation in organic liquids is set by pulse duration

• Robert Stuckert,
• Felix Pohl,
• Oleg Prymak,
• Ulrich Schürmann,
• Christoph Rehbock,
• Lorenz Kienle and
• Stephan Barcikowski

Beilstein J. Nanotechnol. 2025, 16, 1141–1159, doi:10.3762/bjnano.16.84

• organic solvents, active carbon species (radicals, permanent gases, degradation and condensation products as well as elemental carbon) were shown to form by various studies, conducting techniques such as gas-displacement quantifications and subsequent analysis via gas chromatography-coupled techniques [92

Fabrication of metal complex phthalocyanine and porphyrin nanoparticle aqueous colloids by pulsed laser fragmentation in liquid and their potential application to a photosensitizer for photodynamic therapy

• Taisei Himeda,
• Risako Kunitomi,
• Ryosuke Nabeya,
• Tamotsu Zako and
• Tsuyoshi Asahi

Beilstein J. Nanotechnol. 2025, 16, 1088–1096, doi:10.3762/bjnano.16.80

• photosensitized ROS generation was examined by using 1,3-diphenylisobenzofuran (DBPF) as chemical quencher. DPBF is a substance that reacts efficiently with ROS such as singlet oxygen, hydroxyl radicals, and superoxide anions [32][33][34]. The generation of ROS was monitored by absorption spectroscopy of the

Time-resolved probing of laser-induced nanostructuring processes in liquids

• Maximilian Spellauge,
• David Redka,
• Mianzhen Mo,
• Changyong Song,
• Heinz Paul Huber and
• Anton Plech

Beilstein J. Nanotechnol. 2025, 16, 968–1002, doi:10.3762/bjnano.16.74

• , liquid water produces hydrated electrons and water cations (H2O+), which undergo proton transfer with neighboring water molecules at timescales shorter than 100 fs to generate hydroxyl radicals (OH) and hydronium cations (H3O+) [97]. Simultaneously, the ionized electrons in the excited p-like state

• undergo rapid solvation by neighboring water molecules in ≈50 fs or transition nonadiabatically to the s-like state at a similar timescale [98][99][100]. The hydrated and thermalized electrons then recombine with ion cores and hydroxyl radicals through geminate and non-geminate recombination processes

Changes of structural, magnetic and spectroscopic properties of microencapsulated iron sucrose nanoparticles in saline

• Sabina Lewińska,
• Pavlo Aleshkevych,
• Roman Minikayev,
• Anna Bajorek,
• Mateusz Dulski,
• Krystian Prusik,
• Tomasz Wojciechowski and
• Anna Ślawska-Waniewska

Beilstein J. Nanotechnol. 2025, 16, 762–784, doi:10.3762/bjnano.16.59

Efficiency of single-pulse laser fragmentation of organic nutraceutical dispersions in a circular jet flow-through reactor

• Tina Friedenauer,
• Maximilian Spellauge,
• Alexander Sommereyns,
• Verena Labenski,
• Tuba Esatbeyoglu,
• Christoph Rehbock,
• Heinz P. Huber and
• Stephan Barcikowski

Beilstein J. Nanotechnol. 2025, 16, 711–727, doi:10.3762/bjnano.16.55

• ) nanoparticles [60]. On the other hand, it has been shown that optical breakdown and the production of ROS are hampered at high nanoparticle concentrations [60], which may be responsible for the low degradation by LFL-generated radicals at high particle mass concentrations. Furthermore, it has to be considered

Colloidal few layered graphene–tannic acid preserves the biocompatibility of periodontal ligament cells

• Teissir Ben Ammar,
• Naji Kharouf,
• Dominique Vautier,
• Housseinou Ba,
• Nivedita Sudheer,
• Philippe Lavalle and
• Vincent Ball

Beilstein J. Nanotechnol. 2025, 16, 664–677, doi:10.3762/bjnano.16.51

• , particularly antioxidant effects [16][17][18]. Bioactive antioxidants reduce oxidative stress by inhibiting unstable oxygen radicals [17]. Oxidative stress occurs when reactive oxygen species (ROS) damage cellular components because of an imbalance in the normal redox state of cells [17][19]. ROS, which

• include superoxide radicals, hydroxyl radicals, and hydrogen peroxide, are natural byproducts of the oxidative metabolism. Mammalian cells maintain balanced ROS levels for homeostasis and cellular proliferation. However, excess ROS creates an electron imbalance that triggers continuous electron transfer

• reactions, leading to oxidative stress [17]. Studies have shown that TA exhibits significant antioxidant properties by suppressing hydroxyl radical formation and neutralizing both superoxide anion radicals and hydrogen peroxide. However, its antioxidant efficacy is concentration-dependent. While it shows

A formulation containing Cymbopogon flexuosus essential oil: improvement of biochemical parameters and oxidative stress in diabetic rats

• Ailton Santos Sena-Júnior,
• Cleverton Nascimento Santana Andrade,
• Pedro Henrique Macedo Moura,
• Jocsã Hémany Cândido dos Santos,
• Cauãn Torres Trancoso,
• Eloia Emanuelly Dias Silva,
• Deise Maria Rego Rodrigues Silva,
• Ênio Pereira Telles,
• Luiz André Santos Silva,
• Isabella Lima Dantas Teles,
• Sara Fernanda Mota de Almeida,
• Daniel Alves de Souza,
• Jileno Ferreira Santos,
• Felipe José Aidar Martins,
• Ana Mara de Oliveira e Silva,
• Sandra Lauton-Santos,
• Guilherme Rodolfo Souza de Araujo,
• Cristiane Bani Correa,
• Rogéria De Souza Nunes,
• Lysandro Pinto Borges and
• Ana Amélia Moreira Lira

Beilstein J. Nanotechnol. 2025, 16, 617–636, doi:10.3762/bjnano.16.48

• suggest attenuation of hepatic injury and systemic inflammation, which are commonly exacerbated in diabetic states. These effects may be attributed to the modulation of oxidative stress pathways, particularly through the scavenging of free radicals and the upregulation of endogenous antioxidant enzymes

Effect of additives on the synthesis efficiency of nanoparticles by laser-induced reduction

• Rikuto Kuroda,
• Takahiro Nakamura,
• Hideki Ina and
• Shuhei Shibata

Beilstein J. Nanotechnol. 2025, 16, 464–472, doi:10.3762/bjnano.16.35

• of nanoparticles in large quantities for practical use. In this study, we investigated improvements of the synthesis efficiency of nanoparticles in LRL by adding scavengers, such as isopropyl alcohol (IPA) and glycerin, for oxidative radicals formed by laser irradiation to the solution and converting

• the oxidative radicals into reducing species. Based on the evaluation of the synthesis efficiency of Au nanoparticles, it was confirmed that the addition of IPA increased the synthesis efficiency of nanoparticles by about five times, and the addition of glycerin increased it by about nine times

• radical scavengers In laser-induced reduction, laser irradiation breaks down water molecules to produce various radical species. The standard electrode potentials of solvated electrons (e−aq) and hydrogen radicals (H•) are E0 = −2.77 V and E0 = −2.1 V, respectively [33]. It has been reported that solvated

Emerging strategies in the sustainable removal of antibiotics using semiconductor-based photocatalysts

• Yunus Ahmed,
• Keya Rani Dutta,
• Parul Akhtar,
• Md. Arif Hossen,
• Md. Jahangir Alam,
• Obaid A. Alharbi,
• Hamad AlMohamadi and
• Abdul Wahab Mohammad

Beilstein J. Nanotechnol. 2025, 16, 264–285, doi:10.3762/bjnano.16.21

• • radicals [35][57]. The second pathway also known as the oxidative pathway, occurs when the holes migrate to the surface of the photocatalyst. As a result, HO• radicals are generated by oxidizing H2O/OH−, and this generation is influenced by the alkalinity or acidity of the surrounding environment (H2O/OH

Clays enhanced with niobium: potential in wastewater treatment and reuse as pigment with antibacterial activity

• Silvia Jaerger,
• Patricia Appelt,
• Mario Antônio Alves da Cunha,
• Fabián Ccahuana Ayma,
• Ricardo Schneider,
• Carla Bittencourt and
• Fauze Jacó Anaissi

Beilstein J. Nanotechnol. 2025, 16, 141–154, doi:10.3762/bjnano.16.13

• generate OH• radicals (strong oxidants), leading to the mineralization of organic pollutants, including textile dyes [8]. In this study, the strategy and objective are to modify bentonite clay with niobium phosphate and niobium oxide by the calcinated method, and then use it as an adsorbent or