Features and advantages of flexible silicon nanowires for SERS applications

• Hrvoje Gebavi,
• Vlatko Gašparić,
• Dubravko Risović,
• Nikola Baran,
• Paweł Henryk Albrycht and
• Mile Ivanda

Beilstein J. Nanotechnol. 2019, 10, 725–734, doi:10.3762/bjnano.10.72

• -sensitive and has a relatively large Raman cross section (ca. 10−29 cm2/sr [28]). The boronic acid group binds to certain analytes, for example, peptidoglycans in bacterial cell walls [29]. Recently, the difficult detection of saccharides (glucose, fructose) due to a low Raman scattering cross-section and a

• weak metal affinity was facilitated through the surface immobilization via 4-MPBA [30][31]. The 4-MPBA reporter features are predominantly based on re-orientation i.e. binding of the analyte via the boronic acid group causing a symmetry breaking and activation of the charge transfer mechanism which

• ). With the increase of the pH value, the sp2-hybridized boronic acid changes to the sp3-hybridized boronate [33]. The fabricated horizontal SiNWs synthesized at different temperatures in the range from 480 to 560 °C were all sputtered with Ag for 5 min. After that, the samples were dipped in 10−4 M MPBA

Closed polymer containers based on phenylboronic esters of resorcinarenes

• Tatiana Yu. Sergeeva,
• Rezeda K. Mukhitova,
• Irek R. Nizameev,
• Marsil K. Kadirov,
• Polina D. Klypina,
• Albina Y. Ziganshina and
• Alexander I. Konovalov

Beilstein J. Nanotechnol. 2018, 9, 1594–1601, doi:10.3762/bjnano.9.151

• release of dye is achieved by lowering the pH value to 3 or by adding glucose. Keywords: boronic acid; polymer nanocontainer; resorcinarene; responsive release; Introduction Boronic acids effectively interact with diols [1][2][3][4] that have found application in various fields: in the recognition and

• sensing of carbohydrates and glycoproteins [5][6][7][8][9][10][11], in separation techniques [12] and in labeling and manipulation of proteins [13][14][15]. In recent years, boronic acid derivatives were applied in the construction of functional materials, i.e., stimuli-responsive devices and carriers for

A novel electrochemical nanobiosensor for the ultrasensitive and specific detection of femtomolar-level gastric cancer biomarker miRNA-106a

• Maryam Daneshpour,
• Kobra Omidfar and
• Hossein Ghanbarian

Beilstein J. Nanotechnol. 2016, 7, 2023–2036, doi:10.3762/bjnano.7.193

• methodology and reached a low detection limit for miRNA [29], most of the label-free miRNA biosensors are developed using molecular probes such as methylene blue [30], Oracet blue [21], and ferrocene boronic acid [31]. In spite of the quicker and more accurate results offered by the label-free methods, it

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

• demonstrated by the detection of a biologically relevant model analyte, 4-mercaptophenyl boronic acid. Keywords: colloidal nanoparticles; convective self-assembly; interparticle gaps; surface enhanced Raman scattering; chemiresistor; Introduction The development of optical sensors is still following an

• connected by interdigitated electrodes (IDE) on a commercially available chip. We tested the electrical response of the sensor to external stimuli and validated its capability to detect the model analyte mercaptophenyl boronic acid. In contrast with previous nanoparticle-based chemiresistors, which use

Poly(styrene)/oligo(fluorene)-intercalated fluoromica hybrids: synthesis, characterization and self-assembly

• Giuseppe Leone,
• Francesco Galeotti,
• William Porzio,
• Guido Scavia,
• Luisa Barba,
• Gianmichele Arrighetti,
• Giovanni Ricci,
• Chiara Botta and
• Umberto Giovanella

Beilstein J. Nanotechnol. 2014, 5, 2450–2458, doi:10.3762/bjnano.5.254

• -octylfluorene-2-boronic acid pinacol ester was purchased from Alfa Aesar. 2,7-dibromo-9,9-bis(6’-bromohexyl)fluorene was synthesized following the procedure reported elsewhere [36]. Materials preparation Synthesis of 2,7-bis(9,9-dioctylfluorene-2-yl)-9,9-bis[6-(trimethylammonium)hexyl]fluorene dibromide (TF) TF

• was synthesized by standard Suzuki coupling reaction of 2,7-dibromo-9,9-bis(6’-bromohexyl)fluorene and 9,9-di-n-octylfluorene-2-boronic acid pinacol ester and subsequent quaternization of the neutral precursor with trimethylamine, according to the following procedure. A mixture of 2,7-dibromo-9,9-bis

• (6’-bromohexyl)fluorene (173 mg, 0.266 mmol), 9,9-di-n-octylfluorene-2-boronic acid pinacol ester (302 mg, 0.585 mmol), Pd(PPh3)4 (6 mg, 0.005 mmol), aqueous potassium carbonate (2 M, 1.0 mL), and toluene (2.5 mL) was deoxygenated and then heated to 90 °C under nitrogen. The mixture was stirred for

Nano-rings with a handle – Synthesis of substituted cycloparaphenylenes

• Anne-Florence Tran-Van and
• Hermann A. Wegner

Beilstein J. Nanotechnol. 2014, 5, 1320–1333, doi:10.3762/bjnano.5.145

• transformed to the boronic acid. This compound was then coupled with tetrabromoquinone via Suzuki coupling and treated with DDQ to furnish the tetraphenylbenzoquinone. The addition of lithiated phenyl iodide gave the syn-diol after separation. The compound was subsequently methylated. They presented a