Unveiling the potential of alginate-based nanomaterials in sensing technology and smart delivery applications

• Shakhzodjon Uzokboev,
• Khojimukhammad Akhmadbekov,
• Ra’no Nuritdinova,
• Salah M. Tawfik and
• Yong-Ill Lee

Beilstein J. Nanotechnol. 2024, 15, 1077–1104, doi:10.3762/bjnano.15.88

• include conductive polymers, enzymes, carbon nanotubes, and molecularly imprinted polymers (MIPs). MIPs function similarly to enzymes, producing polymeric cross-linked active sites for certain analytes. MIPs were initially used in optical sensing, but they have lately been examined in electrochemical

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

• (miniaturised) with the potential for low-cost manufacturing. Optical sensing: fluorescent sensors Optical sensors are light-based analytical devices based on the alteration in the measurement of light wavelengths following the interaction of the analyte with the molecular recognition element (Figure 5

• resonance, this review will exclusively concentrate on the luminescence (particularly fluorescence) sensing mechanism. The basis for optical sensing is the luminescence mechanism, which is the spontaneous emission in the optical range of ultraviolet, visible, or infrared light by a substance without being

• when synthesising MOFs for optical sensing applications. Note that phosphorescence, which is typically relatively weak at ambient temperature due to solvent quenching and self-quenching of the long-lived excited state, constitutes the majority of lanthanide luminescence. The possibility of solvent

Double-layer symmetric gratings with bound states in the continuum for dual-band high-Q optical sensing

• Chaoying Shi,
• Jinhua Hu,
• Xiuhong Liu,
• Junfang Liang,
• Jijun Zhao,
• Haiyan Han and
• Qiaofen Zhu

Beilstein J. Nanotechnol. 2022, 13, 1408–1417, doi:10.3762/bjnano.13.116

• optical field; nonlinear optics; optical sensing; Introduction High quality (Q) factor resonance in nanophotonics has attracted considerable attention in the past decades due to its wide applications in narrow-band filters [1], nonlinear optics [2], optical sensors [3] and lasers [4]. To date, most

• grating (HCG) structures in periodic subwavelengths [9][10]. Among them, HCG structures built on silicon-on-insulator (SOI) substrates establish a new platform for integrated optics as well as optical sensing [11][12] owing to its high reflectivity in bandwidth (>99%) and compatibility with the

• be evolved by controlling the grating gaps. Then, the FP-BIC is induced by varying the cavity length of the structure. Finally, we achieved a dual-band high-Q resonator for optical sensing, which is potentially valuable for applications in multi-wavelength sensing. Structure and Principle The

Detection and imaging of Hg(II) in vivo using glutathione-functionalized gold nanoparticles

• Gufeng Li,
• Shaoqing Li,
• Rui Wang,
• Min Yang,
• Lizhu Zhang,
• Yanli Zhang,
• Wenrong Yang and
• Hongbin Wang

Beilstein J. Nanotechnol. 2022, 13, 549–559, doi:10.3762/bjnano.13.46

• concentration of electrolyte solution was increased. The GNPs-GSH-Rh6G2 have a lower fluorescence baseline in 0.10 M NaCl solution, which is important for the application in living organisms. Detection of Hg(II) We investigated the optical sensing properties of GNPs-GSH-Rh6G2 using fluorescence spectroscopy. To

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

• Plasmonic Metasurfaces for Selective and Sensitive Optical Sensing of Volatile Compounds”, Advanced Materials, with permission from John Wiley & Sons. Copyright © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This content is not subject to CC BY 4.0. TiO2 fractals on candle soot templates. SEM images of

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

• light from ultraviolet to near-infrared have attracted widespread attention in recent years for a variety of applications in industry and technology, such as optical sensing/communication, environmental monitoring, biomedicine, and the “internet of things” [1][2][3][4]. Especially full-spectrum PDs

• full-spectrum optical sensing or optical communication. Powering external circuits as a PENG In structure design of the device, ultra-thin (45 μm) p-Si is prepared by isotropic chemical etching to fabricate flexible electronic devices and enhance the performance of the PDs. The structure diagram of a

• that the p-Si/n-ZnO NWs heterojunction device not only can realize self-powered full-spectrum (UV–visible–NIR) optical sensing but can also serve as a power source (PENG) transforming thermal energy into electrical energy to power other loads. Conclusion We have fabricated a high-performance self

Fabrication of silver nanoisland films by pulsed laser deposition for surface-enhanced Raman spectroscopy

• Bogusław Budner,
• Mariusz Kuźma,
• Barbara Nasiłowska,
• Bartosz Bartosewicz,
• Malwina Liszewska and
• Bartłomiej J. Jankiewicz

Beilstein J. Nanotechnol. 2019, 10, 882–893, doi:10.3762/bjnano.10.89

• ][8][9], photovoltaics [10] or optical sensing through localized surface plasmon resonance (LSPR) [11]. It is therefore not surprising that quite a number of studies have been initiated and performed in order to design and fabricate highly active SERS substrates based on metallic nanoparticles 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

• the spectrum was notably noisy, with a signal-to-noise ratio (SNR) value of 3.52 (see Figure 2b). All these issues are disadvantageous for the future employment of these membranes as optical sensing structures for two reasons. First, the noise can hide tiny displacements of the spectra that could

Metal–dielectric hybrid nanoantennas for efficient frequency conversion at the anapole mode

• Valerio F. Gili,
• Lavinia Ghirardini,
• Davide Rocco,
• Giuseppe Marino,
• Ivan Favero,
• Iännis Roland,
• Giovanni Pellegrini,
• Lamberto Duò,
• Marco Finazzi,
• Luca Carletti,
• Andrea Locatelli,
• Aristide Lemaître,
• Dragomir Neshev,
• Costantino De Angelis,
• Giuseppe Leo and
• Michele Celebrano

Beilstein J. Nanotechnol. 2018, 9, 2306–2314, doi:10.3762/bjnano.9.215

• properties of molecules at liquid–liquid interfaces [7]. The ability to downscale nonlinear optical processes, such as SHG, in extremely confined spatial regions opens many fascinating opportunities in light manipulation and multiplexing [8] as well as in optical sensing and spectroscopy [9][10]. Yet, to

Refractive index sensing and surface-enhanced Raman spectroscopy using silver–gold layered bimetallic plasmonic crystals

• Somi Kang,
• Sean E. Lehman,
• Matthew V. Schulmerich,
• An-Phong Le,
• Tae-woo Lee,
• Stephen K. Gray,
• Rohit Bhargava and
• Ralph G. Nuzzo

Beilstein J. Nanotechnol. 2017, 8, 2492–2503, doi:10.3762/bjnano.8.249

• the most commonly used plasmonic materials because they generate strong plasmonic resonances at visible and near-infrared frequencies [39]. Metallic Ag generates a stronger evanescent field and a narrower plasmon resonance than Au, which in principle is advantageous for both optical sensing and SERS

Streptavidin-coated gold nanoparticles: critical role of oligonucleotides on stability and fractal aggregation

• Roberta D'Agata,
• Pasquale Palladino and
• Giuseppe Spoto

Beilstein J. Nanotechnol. 2017, 8, 1–11, doi:10.3762/bjnano.8.1

• relevant ligands has led to dramatic progresses in both living cells as well as biomolecular diagnostic assays [3][4][5]. In particular, optical sensing exploiting the surface plasmon resonance (SPR) effect has been widely investigated and plays a significant role in biomolecular detection [6][7]. In this

Low temperature co-fired ceramic packaging of CMOS capacitive sensor chip towards cell viability monitoring

• Niina Halonen,
• Joni Kilpijärvi,
• Maciej Sobocinski,
• Timir Datta-Chaudhuri,
• Antti Hassinen,
• Someshekar B. Prakash,
• Peter Möller,
• Pamela Abshire,
• Sakari Kellokumpu and
• Anita Lloyd Spetz

Beilstein J. Nanotechnol. 2016, 7, 1871–1877, doi:10.3762/bjnano.7.179

• spectroscopy [1], electrochemical quartz crystal microbalance measurements [2], optical sensing [3], impedimetric sensing [4][5][6], and capacitive sensing [7][8][9][10][11]. The lab-on-a-chip (LoC) concept is an excellent way to implement label-free, noninvasive, cost-effective cytotoxicity assessment. LoCs

Surface-enhanced infrared absorption studies towards a new optical biosensor

• Lothar Leidner,
• Julia Stäb,
• Jennifer T. Adam and
• Günter Gauglitz

Beilstein J. Nanotechnol. 2016, 7, 1736–1742, doi:10.3762/bjnano.7.166

• results are compared with a similar experiment performed with an ATR (attenuated total reflectance) set-up. Keywords: attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR); direct optical sensing; mid-infrared regime (MIR); reflectometric interference spectroscopy; surface

• markers for many diseases. Optical biosensors are used in basic research and life science, for example, to study protein–protein interactions [1][2]. A subfield of optical biosensors are those operated through direct optical detection. Direct optical sensing relates to the detection of analyte molecules

• thin films. Results and Discussion Reflectometric interference spectroscopy in the mid-infrared Reflectometric interference spectroscopy (RIfS) is a well-established sensor concept for direct optical sensing in the visible wavelength region of the electromagnetic spectrum. It can be used both as a

Hydrophilic silver nanoparticles with tunable optical properties: application for the detection of heavy metals in water

• Paolo Prosposito,
• Federico Mochi,
• Erica Ciotta,
• Mauro Casalboni,
• Fabio De Matteis,
• Iole Venditti,
• Laura Fontana,
• Giovanna Testa and
• Ilaria Fratoddi

Beilstein J. Nanotechnol. 2016, 7, 1654–1661, doi:10.3762/bjnano.7.157

• characterization of AgNPs stabilized by sodium 3-mercaptopropane sulfonate (AgNP-3MPS). A new preparation was optimized to improve the optical sensing performances based on SPR spectral changes. The AgNP-3MPS nanoparticles have been tested as optical sensors in water solution towards different metal ions at

• of the nanoparticles occurred. Metal ion detection We investigated the optical sensing properties of the AgNP-3MPS material via absorption spectroscopy. Each solution of AgNP-3MPS/ion was prepared in spectroscopic cuvettes that were carefully cleaned to avoid contamination. To a specific amount of

Tunable longitudinal modes in extended silver nanoparticle assemblies

• Serene S. Bayram,
• Klas Lindfors and
• Amy Szuchmacher Blum

Beilstein J. Nanotechnol. 2016, 7, 1219–1228, doi:10.3762/bjnano.7.113

• of modern applications in surface-enhanced Raman spectroscopy (SERS), optical sensing and emission enhancement of molecules residing in the near field [33][34]. In addition to applications in spectroscopy, plasmonic interactions may also be exploited in other light-based devices. The miniaturization

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

• demonstration of a dual electrical/optical sensing concept based on gold nanoparticles, combining unique advantages of both chemiresistor and SERS sensors. Results and Discussion Dual sensing concept The main idea of this work stems from the fact that the same physical systems (noble metal colloids) and the

• optical sensing approaches. Finally, although the measurements reported above are done sequentially, and not simultaneous, one can easily accept the fact that the progress to a simultaneous experiment is only a technical matter; it requires technologies such as PDMS molding of a fluidic chamber, and

Self-organization of gold nanoparticles on silanated surfaces

• Htet H. Kyaw,
• Salim H. Al-Harthi,
• Azzouz Sellai and
• Joydeep Dutta

Beilstein J. Nanotechnol. 2015, 6, 2345–2353, doi:10.3762/bjnano.6.242

• structures [8]. AuNPs have been studied intensively for a wide range of applications such as catalysis [9], biosensing [10], colorimetric sensing [11], optical sensing (surface plasmon resonance (SPR) and surface-enhanced Raman scattering (SERS)) [12][13], photonics [13][14], photovoltaic devices [15] and

In situ SU-8 silver nanocomposites

• Søren V. Fischer,
• Basil Uthuppu and
• Mogens H. Jakobsen

Beilstein J. Nanotechnol. 2015, 6, 1661–1665, doi:10.3762/bjnano.6.168

• µm is achieved in the lithographic process. The UV exposure time is found to be independent of the nanoparticle concentration. The fabricated silver nanocomposites exhibit high plasmonic responses suitable for the development of new optoelectronic and optical sensing devices. Keywords: functional

Synergic combination of the sol–gel method with dip coating for plasmonic devices

• Cristiana Figus,
• Maddalena Patrini,
• Francesco Floris,
• Lucia Fornasari,
• Paola Pellacani,
• Gerardo Marchesini,
• Andrea Valsesia,
• Flavia Artizzu,
• Daniela Marongiu,
• Michele Saba,
• Franco Marabelli,
• Andrea Mura,
• Giovanni Bongiovanni and
• Francesco Quochi

Beilstein J. Nanotechnol. 2015, 6, 500–507, doi:10.3762/bjnano.6.52

• used to perform the optical sensing test and to regenerate the sensor chip. The normalized reflectance spectra (R/R0) of both a bare (uncoated), plasmonic, nanostructured chip and a chip coated with an ≈6 nm thick silica layer are shown. The reference reflectance spectrum (R0, Figure 6a) is measured

• after coating with a single layer of ≈6 nm (left) and a double layer (right) of silica. The coatings were realized by using 1:6 (v/v) EtOH dilution of the starting sol (pH ≈4) at a withdrawal speed of 50 mm/min. Simplified schemes showing the procedure used to perform the optical sensing and chip

Green preparation and spectroscopic characterization of plasmonic silver nanoparticles using fruits as reducing agents

• Jes Ærøe Hyllested,
• Marta Espina Palanco,
• Nicolai Hagen,
• Klaus Bo Mogensen and
• Katrin Kneipp

Beilstein J. Nanotechnol. 2015, 6, 293–299, doi:10.3762/bjnano.6.27

• catalyst, as antibacterial agents in medicine or plasmonic active structures in optical sensing and imaging [1][2][3][4][5][6]. These broad fields of applications generate a strong interest also in the preparation of metal nanoparticles. Many methods have been invented to synthesize nanoparticles, which

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

• been a principal area of research in optical sensing devices [1][2][3][4]. The catalytic activity of highly dispersed gold particles either supported on metal oxides or embedded in metal oxides as discovered by Haruta et al. [5] served as pioneering work in the field of noble-metal catalysis in general

• . The co-sputtered film was shown to have 9 atom % Au. Optical sensing apparatus The sensing apparatus used for the experiments is shown in Figure 9. The setup consists of, from right to left, an Ocean Optics tungsten halogen source with an emission wavelength range of 360–2500 nm; the quartz flow cell

• separation between the H2 (red) and CO (blue) markers is a qualitative measure of the difference in response of the sample to the two gases. Optical sensing apparatus. From left: UV–vis source, quartz flow cell with gas inlet and outlet ports, tube furnace, focusing lenses, beam splitters and spectrometers