Engineered PEG–PCL nanoparticles enable sensitive and selective detection of sodium dodecyl sulfate: a qualitative and quantitative analysis

• Soni Prajapati and
• Ranjana Singh

Beilstein J. Nanotechnol. 2025, 16, 385–396, doi:10.3762/bjnano.16.29

• absence of the Bradford reagent. This confirmed that both PEG–PCL NPs and the Bradford reagents need to be added to the ratio for the optical sensor development. PEG–PCL NPs and the Bradford reagent ratio was 2:3, giving maximum optical absorbance (Figure 4a). Similar results were obtained via

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

• ). Biorecognition elements and signal transducers (chemiluminescence, interferometry, surface plasmon resonance, luminescence, colourimetry, or surface-enhanced Raman spectroscopy), are the key components of an optical sensor. Analyte concentration, existence, and other relevant physical attributes are determined

• -workers [10]. According to the authors, the Ksv values of the Cu-MOF-based nanosensor were directly correlated with the temperature, indicating that the quenching mechanism between the triiodothyronine hormone and the optical sensor is dynamic. Additionally, the lifetime decay of the fluorophore is

• scientists developed a portable, simple, and affordable optical sensor based on test paper with fluorophore immobilisation for a quick and visible detection of antibiotics (Figure 8a). It was investigated and established how tetracycline-induced quenching occurred. As seen in Figure 8b, the fluorophore’s

Morphology-driven gas sensing by fabricated fractals: A review

• Vishal Kamathe and
• Rupali Nagar

Beilstein J. Nanotechnol. 2021, 12, 1187–1208, doi:10.3762/bjnano.12.88

• ). The samples were used in the electrochemical reduction of carbon dioxide and for an optical sensor based on LSPR. Figure 22a shows the Au–Bi2O3 fractal structures and the optical sensing of formate and toluene. Figure 22b and Figure 22c show SEM images of the sample on carbon fiber paper and a glass

A self-powered, flexible ultra-thin Si/ZnO nanowire photodetector as full-spectrum optical sensor and pyroelectric nanogenerator

• Liang Chen,
• Jianqi Dong,
• Miao He and
• Xingfu Wang

Beilstein J. Nanotechnol. 2020, 11, 1623–1630, doi:10.3762/bjnano.11.145

• work, a new type of self-powered, high-performance ultra-thin p-Si/n-ZnO nanowire (NW) flexible photodetector (PD) and its application as full-spectrum optical sensor and pyroelectric nanogenerator (PENG) are demonstrated. The working mechanism of PDs for PENGs is carefully investigated and

Commercial polycarbonate track-etched membranes as substrates for low-cost optical sensors

• Paula Martínez-Pérez and
• Jaime García-Rupérez

Beilstein J. Nanotechnol. 2019, 10, 677–683, doi:10.3762/bjnano.10.67

• porous sensors with such easily available mesoporous material. Keywords: chemical sensor; Fabry–Pérot interferometer; optical sensor; polycarbonate; track-etched membrane; Introduction Sensors are present in our daily life in order to detect and monitor chemical, biological and physical agents of

• an evanescent field with the target substance are the best known [2]. However, this kind of optical sensor presents a limited sensitivity, as only part of the light interacts with the substances of interest. To overcome this limitation, porous materials are a good option. Since they allow the

Magnetic-field sensor with self-reference characteristic based on a magnetic fluid and independent plasmonic dual resonances

• Kun Ren,
• Xiaobin Ren,
• Yumeng He and
• Qun Han

Beilstein J. Nanotechnol. 2019, 10, 247–255, doi:10.3762/bjnano.10.23

• -field sensor based on a MF and a plasmonic structure. As far as we know, the combination of a MF with a plasmonic waveguide has not been reported to date. The unique magnetic-optical properties of MFs are the basis of the optical sensor. The plasmonic structure is a MDM waveguide–cavity coupled system

A new bioinspired method for pressure and flow sensing based on the underwater air-retaining surface of the backswimmer Notonecta

• Matthias Mail,
• Adrian Klein,
• Horst Bleckmann,
• Anke Schmitz,
• Torsten Scherer,
• Peter T. Rühr,
• Goran Lovric,
• Robin Fröhlingsdorf,
• Stanislav N. Gorb and
• Wilhelm Barthlott

Beilstein J. Nanotechnol. 2018, 9, 3039–3047, doi:10.3762/bjnano.9.282

• a technical air-retaining surface and an optical sensor (for details see Experimental section). With this setup (Figure 8), which represents a biomimetic proof of principle, we were able to record the verbal conversation of two persons standing in front of the experimental tank. This was the final

Electrospun one-dimensional nanostructures: a new horizon for gas sensing materials

• Muhammad Imran,
• Nunzio Motta and
• Mahnaz Shafiei

Beilstein J. Nanotechnol. 2018, 9, 2128–2170, doi:10.3762/bjnano.9.202

Colloidal solution of silver nanoparticles for label-free colorimetric sensing of ammonia in aqueous solutions

• Alessandro Buccolieri,
• Antonio Serra,
• Gabriele Giancane and
• Daniela Manno

Beilstein J. Nanotechnol. 2018, 9, 499–507, doi:10.3762/bjnano.9.48

• (NH3) in the concentration range from 10−2 to 103 ppm to develop an optical sensor for NH3 in aqueous solutions. Ammonia affects the features of the nanoparticles obtained in a concentration-dependent manner as determined by UV–vis absorption analysis and TEM observations. Structural and morphological

• silver in the solution (2Ag+ + R2CH–OH + 2OH− → R2C=O + 2H2O + 2Ag ), in agreement with Muench et al. [26]. Nesakumar et al. have recently synthesized silver nanoparticles (AgNPs) using Terminalia chebula extract [27] and have obtained an optical sensor to detect dissolved ammonia in water. The above

• clarified completely in the works published so far. As the results show a dependence of the plasmon resonance on the concentration of NH3, we propose the development of a NH3 “fluid” optical sensor. It is worth to stress that the analysed system, ammonia in a colloidal silver solution is very simple

Optical techniques for cervical neoplasia detection

• Tatiana Novikova

Beilstein J. Nanotechnol. 2017, 8, 1844–1862, doi:10.3762/bjnano.8.186

• a low-power broadband light source produce different backscattering spectra compared to normal cervical tissue in the visible wavelength range. Such difference in spectra detected by an optical sensor can be used in order to identify neoplastic lesions of the cervical epithelium. DRS is an indirect

Chemiresistive/SERS dual sensor based on densely packed gold nanoparticles

• Sanda Boca,
• Cosmin Leordean,
• Simion Astilean and
• Cosmin Farcau

Beilstein J. Nanotechnol. 2015, 6, 2498–2503, doi:10.3762/bjnano.6.259

• concept of a dual electrical/optical sensor, with both chemiresistive and SERS capabilities. The proposed device is realized by self-assembling 15 nm gold nanoparticles into few micrometers-wide strips across commercially available interdigitated electrodes. The dual-mode operation of the device is

• type of optical sensor must be able to identify and quantify the investigated analyte, ideally by the use of a low-cost chip made by simple manufacturing procedures. Noble metal nanoparticles (NPs) demonstrated repeatedly their effectiveness as transducing elements in optical sensors based on surface

• cross-linking reactions, and connected to (micro)electrodes [5][6]. In this work we propose a dual electrical/optical sensor (DEOS) capable of exploiting both chemiresistive and SERS-based sensing. The device consists of a self-assembled film of spherical gold nanoparticles that is electrically

Evolution of microstructure and related optical properties of ZnO grown by atomic layer deposition

• Adib Abou Chaaya,
• Roman Viter,
• Mikhael Bechelany,
• Zanda Alute,
• Donats Erts,
• Anastasiya Zalesskaya,
• Kristaps Kovalevskis,
• Vincent Rouessac,
• Valentyn Smyntyna and
• Philippe Miele

Beilstein J. Nanotechnol. 2013, 4, 690–698, doi:10.3762/bjnano.4.78

• interstitials and adsorbed molecular oxygen on the surface of grains. The ultra-thin ZnO ALD films are attractive for optical sensor/biosensor applications due to their high oxygen to zinc ratio and variable optical properties. In addition, the presence of hydroxyl terminals leads to the hydrophilicity of the

Plasmonics-based detection of H₂ and CO: discrimination between reducing gases facilitated by material control

• Gnanaprakash Dharmalingam,
• Nicholas A. Joy,
• Benjamin Grisafe and
• Michael A. Carpenter

Beilstein J. Nanotechnol. 2012, 3, 712–721, doi:10.3762/bjnano.3.81

• sensors for turbine engines, solid-oxide fuel cells, and other high-temperature applications. Keywords: hydrogen detection; nanocomposites gold nanoparticles; optical sensor; plasmonics; physical vapor deposition; surface plasmon resonance; Introduction Sensors based on surface plasmon resonance have

Determination of object position, vortex shedding frequency and flow velocity using artificial lateral line canals

• Adrian Klein and
• Horst Bleckmann

Beilstein J. Nanotechnol. 2011, 2, 276–283, doi:10.3762/bjnano.2.32

• cylinder. Keywords: artificial lateral line; biomimetics; flow sensor; mechanoreception; optical sensor; Introduction Nature has invented a stunning diversity of sensory systems whose small size and high sensitivity is so far unmatched by man-made devices. Flow sensors based on hairs are located on the