Fiber optic sensors based on hybrid phenyl-silica xerogel films to detect n-hexane: determination of the isosteric enthalpy of adsorption

• Jesús C. Echeverría,
• Ignacio Calleja,
• Paula Moriones and
• Julián J. Garrido

Beilstein J. Nanotechnol. 2017, 8, 475–484, doi:10.3762/bjnano.8.51

• ) directly relates to the dispersion of the results. The largest COV was for the response measured at 5 and 10 hPa. The limit of detection (LoD) was calculated by the propagation of errors approach, which includes the variability of the blank measurements and the uncertainty of the sample measurements. where

Comparison of four functionalization methods of gold nanoparticles for enhancing the enzyme-linked immunosorbent assay (ELISA)

• Paula Ciaurriz,
• Fátima Fernández,
• Edurne Tellechea,
• Jose F. Moran and
• Aaron C. Asensio

Beilstein J. Nanotechnol. 2017, 8, 244–253, doi:10.3762/bjnano.8.27

• ELISA limit of detection (LOD). Some strategies have been explored to enhance sensitivity, such as redox complexes, electroactive molecules and metal ions [6]. Along these lines, several nanotechnology-based strategies have been proposed involving nanoparticle-based solutions [5][7][8][9][10][11][12

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

• concentration of 1 ppm at room temperature. Our system showed sensibility mainly to nickel (II) ions. For this type of ion, we tested the sensitivity as a function of the ion concentration in the range 1.0–0.1 ppm and we estimated a limit of detection (LOD) of 0.3 ppm. Results and Discussion Silver nanoparticle

Graphene-enhanced plasmonic nanohole arrays for environmental sensing in aqueous samples

• Christa Genslein,
• Peter Hausler,
• Eva-Maria Kirchner,
• Rudolf Bierl,
• Antje J. Baeumner and
• Thomas Hirsch

Beilstein J. Nanotechnol. 2016, 7, 1564–1573, doi:10.3762/bjnano.7.150

• continuous gold film (Figure 6). For the nanohole array with a D/P of 0.43, saturation is almost reached at 5 µM (97% according to the Langmuir fit) and a roughly 12-fold enhancement of the maximum signal response compared to a continuous gold film is observed. Therefore, a 10-times better limit of detection

• (LOD) of ca. 20 nM is found when measuring with substrates with D/P = 0.43 compared to a continuous gold film (ca. 190 nM). The concentration covers the guideline values of the World Health Organization in fresh and drinking water for bis(2-ethylhexyl)phthalate (3–40 nM), the most widespread phthalate

Voltammetric determination of polyphenolic content in pomegranate juice using a poly(gallic acid)/multiwalled carbon nanotube modified electrode

• Refat Abdel-Hamid and
• Emad F. Newair

Beilstein J. Nanotechnol. 2016, 7, 1104–1112, doi:10.3762/bjnano.7.103

• of detection (LOD) of 3.22 × 10−6 M. The regression relationship is expressed as The lower limit of detection was calculated from the calibration data using the following equation: where s is the standard deviation of the intercept and m is the slope of the regression line. The analytical performance

• additions of standard solution of GA. On plotting the peak current versus GA concentration, the corresponding calibration plot was obtained (inset of Figure 6). It is found that the peak current of GA correlates linearly with the GA concentration in the range of 4.975 × 10−6 to 3.381 × 10−5 M with a limit

Electrochemical behavior of polypyrrol/AuNP composites deposited by different electrochemical methods: sensing properties towards catechol

• Celia García-Hernández,
• Cristina García-Cabezón,
• Cristina Medina-Plaza,
• Fernando Martín-Pedrosa,
• Yolanda Blanco,
• José Antonio de Saja and
• María Luz Rodríguez-Méndez

Beilstein J. Nanotechnol. 2015, 6, 2052–2061, doi:10.3762/bjnano.6.209

• CP in 1·10−5 to 1·10−3 mol/L catechol solutions. A linear increase in the intensity of the peaks with the concentration was observed in the studied range. The limit of detection (LOD) was calculated from the calibration curves following the “3sd/m” criterion. As observed in Table 2, the LODs were in

Optimized design of a nanostructured SPCE-based multipurpose biosensing platform formed by ferrocene-tethered electrochemically-deposited cauliflower-shaped gold nanoparticles

• Wicem Argoubi,
• Maroua Saadaoui,
• Sami Ben Aoun and
• Noureddine Raouafi

Beilstein J. Nanotechnol. 2015, 6, 1840–1852, doi:10.3762/bjnano.6.187

• recognition sites of the immunosensor. The plot of potential variation vs the amount of Ag gives a straight line (R2 = 0.97871) (Figure 4d) which confirmed the reproducibility of the measurements [35]. The limit of detection (LoD) and the limit of quantification (LoQ) were calculated using the formulae LoD

Glassy carbon electrodes modified with multiwalled carbon nanotubes for the determination of ascorbic acid by square-wave voltammetry

• Sushil Kumar and
• Victoria Vicente-Beckett

Beilstein J. Nanotechnol. 2012, 3, 388–396, doi:10.3762/bjnano.3.45

• electrode. Table 1 also shows that better repeatability and reproducibility of both peak currents and peak potentials were observed on the modified GCE compared to the bare GCE, demonstrating clearly that the modified electrode was protected from fouling by the Nafion membrane. The limit of detection (LOD