Zinc oxide nanostructures for fluorescence and Raman signal enhancement: a review

• Ioana Marica,
• Fran Nekvapil,
• Maria Ștefan,
• Cosmin Farcău and
• Alexandra Falamaș

Beilstein J. Nanotechnol. 2022, 13, 472–490, doi:10.3762/bjnano.13.40

• metal-based nanocomposites can present several disadvantages, such as the use of complex polymer stabilizers, which result in toxic activity [40], SERS deactivation [41], or undesired signals in SERS analysis. Therefore, simple and rapid metal decoration methods have been applied recently. Some of these

Multiwalled carbon nanotube based aromatic volatile organic compound sensor: sensitivity enhancement through 1-hexadecanethiol functionalisation

• Nadra Bohli,
• Meryem Belkilani,
• Juan Casanova-Chafer,
• Eduard Llobet and
• Adnane Abdelghani

Beilstein J. Nanotechnol. 2019, 10, 2364–2373, doi:10.3762/bjnano.10.227

• , metal decoration or chemical functionalisation [13]. In the present work, we investigated the effect of gold nanoparticle decorated, multiwall carbon nanotubes functionalized with 1-hexadecanethiol on the sensor selectivity and sensitivity towards benzene and toluene vapours. Experimental Materials

Gas sensing properties of MWCNT layers electrochemically decorated with Au and Pd nanoparticles

• Elena Dilonardo,
• Michele Penza,
• Marco Alvisi,
• Riccardo Rossi,
• Gennaro Cassano,
• Cinzia Di Franco,
• Francesco Palmisano,
• Luisa Torsi and
• Nicola Cioffi

Beilstein J. Nanotechnol. 2017, 8, 592–603, doi:10.3762/bjnano.8.64

• decoration, in both cases. Oxygen is commonly present in MWCNTs synthesized by the CVD process and is mainly derived from the oxygen adsorbed on the surface, as well as from carbon oxidation events. In both hybrid systems, the atomic percentage of oxygen further increased at the MWCNT surface after metal

• metal-decorated MWCNTs The elemental percentages detected by XPS on the surface of pristine and metal-decorated MWCNTs are reported in Table 1. As expected, the deposited metal content increases with the deposition time. The atomic percentage of oxygen at the MWCNT surface increases after the metal

• decoration, probably due to the generation of defects during the metal functionalization [40][41]. However, although the total oxygen content in the MWCNT films increased upon metal inclusion, the oxygen/gold elemental ratio decreased, while the oxygen/palladium ratio remained constant. The chemical

Sensitive detection of hydrocarbon gases using electrochemically Pd-modified ZnO chemiresistors

• Elena Dilonardo,
• Michele Penza,
• Marco Alvisi,
• Gennaro Cassano,
• Cinzia Di Franco,
• Francesco Palmisano,
• Luisa Torsi and
• Nicola Cioffi

Beilstein J. Nanotechnol. 2017, 8, 82–90, doi:10.3762/bjnano.8.9

• components of the O 1s spectrum, O–Zn and O–C, remains unchanged after the surface functionalization. Therefore, the atomic ratio O–Zn/Zn (the percentage of oxygen bound to metal divided by the total metal percentage) remained stoichiometric, i.e. equal to 1, also after the metal decoration, as reported in

Pt- and Pd-decorated MWCNTs for vapour and gas detection at room temperature

• Hamdi Baccar,
• Atef Thamri,
• Pierrick Clément,
• Eduard Llobet and
• Adnane Abdelghani

Beilstein J. Nanotechnol. 2015, 6, 919–927, doi:10.3762/bjnano.6.95

• compounds studied (measured at concentrations up to 50 ppm). Therefore, these sensors could be useful in a small, battery-operated alarm detector, for example, which is able to discriminate aromatic from non-aromatic volatile organic compounds in ambient. Keywords: gas and vapour sensing; metal decoration

• -workers reported the use of an organometallic precursor together with a plasma treatment in order to obtain FeO-decorated multiwalled carbon nanotubes for the room-temperature detection of aromatic and non-aromatic VOCs [38]. In spite of the fact that metal decoration effectively helps in tuning the gas

• advantageous technique for functionalising carbon nanotubes since it allows for an oxygen plasma treatment followed by metal decoration without breaking the vacuum or the need to transfer the nanotubes between different reactors and additionally takes only a few minutes. Furthermore, this treatment can be