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

• performed on a Hitachi Regulus SU8200. UV–vis spectroscopy was performed on an Agilent UV–Vis Cary 4000. Supercritical drying was carried out using a SPI-DRY critical point dryer Jumbo. HPLC measurements were performed on a Hewlett Packard 1100 Series. ESR spectroscopy: ESR spectroscopy was performed on a

On the road to sustainability – application of metallic nanoparticles obtained by green synthesis in dentistry: a scoping review

• Lorena Pinheiro Vasconcelos Silva,
• Joice Catiane Soares Martins,
• Israel Luís Carvalho Diniz,
• Júlio Abreu Miranda,
• Danilo Rodrigues de Souza,
• Éverton do Nascimento Alencar,
• Moan Jéfter Fernandes Costa and
• Pedro Henrique Sette-de-Souza

Beilstein J. Nanotechnol. 2025, 16, 1851–1862, doi:10.3762/bjnano.16.128

• structural, optical, and chemical properties. FTIR enables the identification of functional groups involved in the reduction and stabilization of nanoparticles, typically derived from phytochemicals in plant extracts used as reducing agents [52][56]. UV–vis spectroscopy is widely employed to monitor

Prospects of nanotechnology and natural products for cancer and immunotherapy

• Jan Filipe Andrade Santos,
• Marcela Bernardes Brasileiro,
• Pamela Danielle Cavalcante Barreto,
• Ligiane Aranha Rocha and
• José Adão Carvalho Nascimento Júnior

Beilstein J. Nanotechnol. 2025, 16, 1644–1667, doi:10.3762/bjnano.16.116

• scattering (DLS), and UV–visible (UV–vis) spectroscopy were used for characterization. The nanoparticles showed increased cellular uptake compared to free PD-L1, suppression of the NF-κB pathway as indicated by reduced PHO-P65 protein expression, and enhanced tumor inhibition due to immune activation and

• cell cycle arrest, regulate oxidative stress, enhance metabolic reprogramming, inhibit invasion and metastasis, and modulate immunity and inflammation [129]. The developed nanoparticles underwent physicochemical characterization by SEM, UV–vis spectroscopy, and encapsulation testing, in which the

• ]. The formulation includes temperature-responsive and non-temperature-responsive amphiphilic molecules (weight ratio of 7:3). UV–vis spectroscopy, TEM, and DLS experiments demonstrated that administration of 14.37 mg·kg−1 of the nanoparticles inhibited lung adenocarcinoma proliferation and migration

Influence of laser beam profile on morphology and optical properties of silicon nanoparticles formed by laser ablation in liquid

• Natalie Tarasenka,
• Vladislav Kornev,
• Alena Nevar and
• Nikolai Tarasenko

Beilstein J. Nanotechnol. 2025, 16, 1533–1544, doi:10.3762/bjnano.16.108

• structure of the formed NPs were analyzed by means of ultraviolet–visible (UV–vis) spectroscopy, high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), X-ray diffraction (XRD), and Raman and photoluminescence (PL) spectroscopies. Particle size and morphology

• . Optical characterization The optical properties of Si NPs dispersed in ethanol were investigated using Raman and UV–vis spectroscopy. Initially, Si NPs obtained using Bessel, annular, and Gaussian laser beams were characterized by Raman spectroscopy, and their Raman spectra (vibrational modes) were

Dendrimer-modified carbon nanotubes for the removal and recovery of heavy metal ions from water

• Thao Quynh Ngan Tran,
• Huu Trung Nguyen,
• Subodh Kumar and
• Xuan Thang Cao

Beilstein J. Nanotechnol. 2025, 16, 1522–1532, doi:10.3762/bjnano.16.107

• patterns were recorded on a Shimadzu 6100 X-ray diffractometer in a 2θ range of 10–80°, providing insights into the crystalline structure and phase composition of the CNTs before and after modification. UV–vis spectroscopy was used to monitor adsorption of metal ions by the interaction of dendrimerized

Cross-reactivities in conjugation reactions involving iron oxide nanoparticles

• Shoronia N. Cross,
• Katalin V. Korpany,
• Hanine Zakaria and
• Amy Szuchmacher Blum

Beilstein J. Nanotechnol. 2025, 16, 1504–1521, doi:10.3762/bjnano.16.106

• using UV–vis spectroscopy. Following the CuAAC reaction with Cy5-azide, we immediately see a visible change in the color of the IONPs from brown to deep blue-green (Figure 3B, inset). The UV–vis spectrum of the IONP-PPA CuAAC product (Figure 3B.i) shows two broad peaks at ≈610 and 650 nm, which

• should be detectable directly by UV–vis spectroscopy. Unfortunately, we could not detect binding with any of these dyes (results not shown). All three dyes showed relatively low aqueous solubility, and have their primary amine attached directly to an aromatic ring structure, which may contribute to both

• Information File 1, Figure S3) [64]. To assess any cross-reactivity in the thiol–maleimide Michael addition reaction, we utilized Cy3-maleimide, and relied on UV–vis spectroscopy to detect the binding of Cy3. When reacted with Cy3-maleimide, the IONP-CySH product was noticeably red (Figure 9A, inset

Photochemical synthesis of silver nanoprisms via green LED irradiation and evaluation of SERS activity

• Tuan Anh Mai-Ngoc,
• Nhi Kieu Vo,
• Cong Danh Nguyen,
• Thi Kim Xuan Nguyen and
• Thanh Sinh Do

Beilstein J. Nanotechnol. 2025, 16, 1417–1427, doi:10.3762/bjnano.16.103

• samples. It can thus be concluded that 72 h is the optimal duration for the transformation of AgNPs into AgNPrs using green LED irradiation, aligning well with the UV–vis spectroscopy results. TEM images of the samples at a magnification of 50,000 after 6, 12, 24, 48, and 72 h of LED irradiation are shown

• , 12, 24, 48, and 72 h. During the irradiation process, the color of the solution gradually shifted from pale yellow to green and eventually to blue. Characterization The optical properties of the samples were characterized using UV–vis spectroscopy (Jasco V-670) with a scanning range from 900 to 200

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

• materials (BP, rBP, and rCBP) was observed using a scanning electron microscope (SEM), model Primas E (US). The samples were coated with Pt for 30 s prior to measurement. Bioactive properties UV absorption. Transparency and UV absorption of the films were determined using UV–vis spectroscopy in the

Synthesis of biowaste-derived carbon-dot-mediated silver nanoparticles and the evaluation of electrochemical properties for supercapacitor electrodes

• Navya Kumari Tenkayala,
• Chandan Kumar Maity,
• Md Moniruzzaman and
• Subramani Devaraju

Beilstein J. Nanotechnol. 2025, 16, 933–943, doi:10.3762/bjnano.16.71

• using UV–vis spectroscopy. Supporting Information File 1, section S1 contains the details of the material characterization techniques. Results and Discussion Plant extract-mediated production of nanoparticles from noble metal precursors are well reported. In the present work, waste P. pinnata leaf

Morphology and properties of pyrite nanoparticles obtained by pulsed laser ablation in liquid and thin films for photodetection

• Akshana Parameswaran Sreekala,
• Bindu Krishnan,
• Rene Fabian Cienfuegos Pelaes,
• David Avellaneda Avellaneda,
• Josué Amílcar Aguilar-Martínez and
• Sadasivan Shaji

Beilstein J. Nanotechnol. 2025, 16, 785–805, doi:10.3762/bjnano.16.60

• nanocolloid in this work. The optical properties of nanocolloids and their thin films were evaluated using UV–visible (UV–vis) spectroscopy. The nanoparticle characterization and surface morphology were studied using transmission electron microscopy (TEM), scanning electron microscopy (SEM), and the

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

• of graphene confers antioxidant properties The arrangement of TA molecules on graphene layers and their antioxidant effects were analyzed through three experimental methods. The concentration of TA in the FLG suspension was measured using UV–vis spectroscopy, surface composition changes from graphite

Performance optimization of a microwave-coupled plasma-based ultralow-energy ECR ion source for silicon nanostructuring

• Joy Mukherjee,
• Safiul Alam Mollick,
• Tanmoy Basu and
• Tapobrata Som

Beilstein J. Nanotechnol. 2025, 16, 484–494, doi:10.3762/bjnano.16.37

• the transformative impact of nanopatterning through low-energy inert ions. Keywords: optimization of ion current; surface topography; TEM; ultralow-energy ECR-based ion source; UV–vis spectroscopy; Introduction Ion sources serve as fundamental components in numerous scientific and industrial

Graphene oxide–chloroquine conjugate induces DNA damage in A549 lung cancer cells through autophagy modulation

• Braham Dutt Arya,
• Sandeep Mittal,
• Prachi Joshi,
• Alok Kumar Pandey,
• Jaime E. Ramirez-Vick,
• Govind Gupta and
• Surinder P. Singh

Beilstein J. Nanotechnol. 2025, 16, 316–332, doi:10.3762/bjnano.16.24

• formation of GO–Chl nanoconjugates was confirmed by investigating the optical, functional, structural, and morphological properties employing standard analytical characterization techniques. The optical properties of GO and GO–Chl were assessed using UV–vis spectroscopy (Supporting Information File 1

• two ways viz. entrapment efficacy (EE, % Chl that has been successfully absorbed onto GO) and % drug content or drug loading efficiency (DLE, amount of Chl loaded per unit weight of GO) using UV–vis spectroscopy. Firstly, a standard calibration curve of Chl was plotted by monitoring the optical

• ), and deconvoluted fitting components (multicolored regions) are also shown here. Quantitative estimation of Chl binding onto GO nanosheets using UV–vis spectroscopy: (a) Optical density measurement of various concentrations (2.5–25 µg/mL) of Chl for the preparation of a standard calibration curve. (b

Fabrication and evaluation of BerNPs regarding the growth and development of Streptococcus mutans

• Tuyen Huu Nguyen,
• Hong Thanh Pham,
• Kieu Kim Thanh Nguyen,
• Loan Hong Ngo,
• Anh Ngoc Tuan Mai,
• Thu Hoang Anh Lam,
• Ngan Thi Kim Phan,
• Dung Tien Pham,
• Duong Thuy Hoang,
• Thuc Dong Nguyen and
• Lien Thi Xuan Truong

Beilstein J. Nanotechnol. 2025, 16, 308–315, doi:10.3762/bjnano.16.23

• prepared using a wet-milling method with zirconium balls to enhance bioavailability and expand potential applications. The particle size and physicochemical properties of the BerNPs were analyzed using field-emission scanning electron microscopy (FE-SEM), UV–vis spectroscopy, X-ray diffraction, and Fourier

Preferential enrichment and extraction of laser-synthesized nanoparticles in organic phases

• Theo Fromme,
• Maximilian L. Spiekermann,
• Florian Lehmann,
• Stephan Barcikowski,
• Thomas Seidensticker and
• Sven Reichenberger

Beilstein J. Nanotechnol. 2025, 16, 254–263, doi:10.3762/bjnano.16.20

• and the vessel was held in place for two hours. Colloids were characterized by UV–vis-spectroscopy using a Cary 50 spectrometer (Varian Inc.) and further processed by OriginPro. The raw UV–vis extinction spectra were baseline-corrected by subtraction of UV–vis extinction spectra gained from

• nanoparticle-free TMS (Supporting Information File 1, Figure S4c) from the UV–vis extinction spectra of the gained colloids in the respective TMS (Supporting Information File 1, Figure S4a,b). Fractions of the colloids in the respective phases were calculated by dividing the extinctions obtained from UV–vis

• -spectroscopy (Supporting Information File 1, Figure S1 and Figure S5) at the wavelength of the plasmon resonance peak (for Au and Ag) or at the wavelength of 550 nm (for Cu, Fe, Al, and Ti). The extinction at a wavelength of 550 nm for copper was used because the plasmon resonance peaks were not always

Radiosensitizing properties of dual-functionalized carbon nanostructures loaded with temozolomide

• Radmila Milenkovska,
• Nikola Geskovski,
• Dushko Shalabalija,
• Ljubica Mihailova,
• Petre Makreski,
• Dushko Lukarski,
• Igor Stojkovski,
• Maja Simonoska Crcarevska and
• Kristina Mladenovska

Beilstein J. Nanotechnol. 2025, 16, 229–251, doi:10.3762/bjnano.16.18

• after exposure to irradiation, X-ray powder diffraction (XRPD) was used. The stability of TMZ under these conditions was determined unsing attenuated total reflectance Fourier-transform infrared (ATR-FTIR) and UV–vis spectroscopy. Most of the procedures and techniques were used in our previous study [43

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

• characterized through colorimetric analysis (CIEL*a*b*) and UV–vis spectroscopy. Antimicrobial activity test The antimicrobial properties of the BEPh, BEOx, A-BEPh, A-BEOx, A-BEPhP, and A-BEOxP samples were investigated against the bacteria Bacillus cereus (ATCC 10876) (Gram-positive) and Proteus mirabilis

Characterization of ZnO nanoparticles synthesized using probiotic Lactiplantibacillus plantarum GP258

• Prashantkumar Siddappa Chakra,
• Aishwarya Banakar,
• Shriram Narayan Puranik,
• Vishwas Kaveeshwar,
• C. R. Ravikumar and
• Devaraja Gayathri

Beilstein J. Nanotechnol. 2025, 16, 78–89, doi:10.3762/bjnano.16.8

• characterization using UV–vis spectroscopy, Fourier-transform infrared spectroscopy, X-ray diffraction measurements, energy-dispersive X-ray spectroscopy, scanning and transmission electron microscopy, photocatalytic studies, electrochemical analysis, and determination of antibacterial and anticancer activity. The

• pattern) and 192 nm (irregular shape). Valuable insights regarding photocatalytic and colloidal stability of the biosynthesized ZnO NPs was provided by using UV–vis spectroscopy and zeta potential analysis. Compared to a similar type of study conducted by Selvarajan and Mohanasrinivasan [24], our study

• °–80° (2θ), with a step size of 0.02° and a dwell time of 1 s per step. Reflectance was studied using UV–vis spectroscopy performed on a Shimadzu UV-2600 double-beam spectrophotometer. Nanoparticles were dispersed in deionized water at a concentration of 1 mg/mL, and the spectra were recorded in the

Facile synthesis of size-tunable L-carnosine-capped silver nanoparticles and their role in metal ion sensing and catalytic degradation of p-nitrophenol

• Akash Kumar,
• Ridhima Chadha,
• Abhishek Das,
• Nandita Maiti and
• Rayavarapu Raja Gopal

Beilstein J. Nanotechnol. 2024, 15, 1576–1592, doi:10.3762/bjnano.15.124

• -AP was monitored through UV–vis spectroscopy. In UV–vis measurements, there was a decrease in absorption intensity at 400 nm, and a minor peak around 300 nm was observed due to the formation of P-AP (Figure 9). Figure 9 illustrates the P-NP degradation at 0.25 mM using ʟ-car-AgNPs (1 ± 0.2 OD). ʟ-car

Green synthesis of carbon dot structures from Rheum Ribes and Schottky diode fabrication

• Muhammed Taha Durmus and
• Ebru Bozkurt

Beilstein J. Nanotechnol. 2024, 15, 1369–1375, doi:10.3762/bjnano.15.110

• electron microscopy (SEM), I–V/C–V measurements, UV–vis spectroscopy, and steady-state fluorescence spectroscopy, respectively. CDs synthesis 2.5 g of the powdered Rheum ribes plant was placed in an autoclave bottle, and 50 mL of pure water was added to the bottle. This aqueous solution was placed in an

Mn-doped ZnO nanopowders prepared by sol–gel and microwave-assisted sol–gel methods and their photocatalytic properties

• Cristina Maria Vlăduț,
• Crina Anastasescu,
• Silviu Preda,
• Oana Catalina Mocioiu,
• Simona Petrescu,
• Jeanina Pandele-Cusu,
• Dana Culita,
• Veronica Bratan,
• Ioan Balint and
• Maria Zaharescu

Beilstein J. Nanotechnol. 2024, 15, 1283–1296, doi:10.3762/bjnano.15.104

• parallel in Figure 7. The insets show a wide pore size distribution reaching 120 nm and pore width maxima located in the mesoporosity area for both samples (40 nm for SG and 35–45 nm for MW). Similar textural features for SG and MW samples are presented in Table 3. UV–vis spectroscopy The recorded UV–vis

Enhanced catalytic reduction through in situ synthesized gold nanoparticles embedded in glucosamine/alginate nanocomposites

• Chi-Hien Dang,
• Le-Kim-Thuy Nguyen,
• Minh-Trong Tran,
• Van-Dung Le,
• Nguyen Minh Ty,
• T. Ngoc Han Pham,
• Hieu Vu-Quang,
• Tran Thi Kim Chi,
• Tran Thi Huong Giang,
• Nguyen Thi Thanh Tu and
• Thanh-Danh Nguyen

Beilstein J. Nanotechnol. 2024, 15, 1227–1237, doi:10.3762/bjnano.15.99

• g·mL−1). The reduction process was initiated through heating the mixture and visually confirmed by a change in color of the reaction mixture indicating the formation of AuNPs on the GluN/Alg composite. UV–vis spectroscopy within the range of 300 to 600 nm was employed to monitor this process

• temperature, and the reaction time, by using UV–vis spectroscopy. Changes in the physicochemical properties, such as morphology and particle size of AuNPs, were monitored through absorbance and the λmax values of the surface plasmon resonance (SPR) band. Figure 2 illustrates the impact of synthesis conditions

Green synthesis of biomass-derived carbon quantum dots for photocatalytic degradation of methylene blue

• Dalia Chávez-García,
• Mario Guzman,
• Viridiana Sanchez and
• Rubén D. Cadena-Nava

Beilstein J. Nanotechnol. 2024, 15, 755–766, doi:10.3762/bjnano.15.63

• incandescent light were used, and the solution was continuously agitated. The absorbance of the solution was measured at 20 min intervals to monitor the progress of the degradation reaction. All samples were evaluated under both light sources. Results and Discussion UV–vis spectroscopy UV–vis spectroscopy was

Photocatalytic degradation of methylene blue under visible light by cobalt ferrite nanoparticles/graphene quantum dots

• Vo Chau Ngoc Anh,
• Le Thi Thanh Nhi,
• Le Thi Kim Dung,
• Dang Thi Ngoc Hoa,
• Nguyen Truong Son,
• Nguyen Thi Thao Uyen,
• Nguyen Ngoc Uyen Thu,
• Le Van Thanh Son,
• Le Trung Hieu,
• Tran Ngoc Tuyen and
• Dinh Quang Khieu

Beilstein J. Nanotechnol. 2024, 15, 475–489, doi:10.3762/bjnano.15.43

• time intervals, 10 mL of the sample was taken and centrifuged to separate the material from the solution. The concentration of remaining MB in the solution was determined by using UV–vis spectroscopy. Identification of intermediates Intermediate products and mineralization level of the MB

• result, the repulsion force of these species comes into play, reducing adsorption. UV–vis spectroscopy was used to study MB decolourisation (Figure 7c). The UV–vis spectra of MB present a strong adsorption band at 664 nm, corresponding to functional groups (n–π* electron transition), and two adsorption

CdSe/ZnS quantum dots as a booster in the active layer of distributed ternary organic photovoltaics

• Gabriela Lewińska,
• Piotr Jeleń,
• Zofia Kucia,
• Maciej Sitarz,
• Łukasz Walczak,
• Bartłomiej Szafraniak,
• Jerzy Sanetra and
• Konstanty W. Marszalek

Beilstein J. Nanotechnol. 2024, 15, 144–156, doi:10.3762/bjnano.15.14

• nanoparticles, including the size of the shell (0.6 nm), and the core size declared by the manufacturer are included in Table 1. UV–vis spectroscopy was conducted with an Avantes Sensline Ava-Spec ULS-RS-TEC fiber-optic spectrophotometer and an Avantes AvaLight DH-S-BAL-Hal lamp. The absorption and luminescence

• determined in a wide frequency range from 10−1 to 106 Hz at room temperature. The amplitude of the alternating current signal was set to 0.1 V. The ZView software was used to analyze the recorded impedance spectra. Results and Discussion UV–vis spectroscopy The pure quantum dots exhibit absorption in the