Multifunctional nanoprobe based on upconversion nanoparticles for luminescent sensing and magnetic resonance imaging

Mou, Xiaoming; Wang, Jiaxin; Meng, Xianfu; Liu, Jinliang; Shi, Liyi; Sun, Lining

doi:10.1016/j.jlumin.2017.05.006

Cited by 24 publications

(12 citation statements)

References 33 publications

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“…The huge development of materials science, nanoscience, and nanomaterials technology has led to the synthesis and engineerization of several nanostructures (metallic and non) used in different fields such as biomedicine [ 1 , 2 ], biotechnology [ 3 , 4 ], energy [ 5 , 6 , 7 , 8 ], optics, and optoelectronics [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. Recently, sensors based on different nanosized materials have been developed, achieving a high sensitivity and selectivity [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ].…”

Section: Introductionmentioning

confidence: 99%

Plasmonic Sensor Based on Interaction between Silver Nanoparticles and Ni2+ or Co2+ in Water

et al. 2018

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Silver nanoparticles capped with 3-mercapto-1propanesulfonic acid sodium salt (AgNPs-3MPS), able to interact with Ni2+ or Co2+, have been prepared to detect these heavy metal ions in water. This system works as an optical sensor and it is based on the change of the intensity and shape of optical absorption peak due to the surface plasmon resonance (SPR) when the AgNPs-3MPS are in presence of metals ions in a water solution. We obtain a specific sensitivity to Ni2+ and Co2+ up to 500 ppb (part per billion). For a concentration of 1 ppm (part per million), the change in the optical absorption is strong enough to produce a colorimetric effect on the solution, easily visible with the naked eye. In addition to the UV-VIS characterizations, morphological and dimensional studies were carried out by transmission electron microscopy (TEM). Moreover, the systems were investigated by means of dynamic light scattering (DLS), Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and high-resolution X-ray photoelectron spectroscopy (HR-XPS). On the basis of the results, the mechanism responsible for the AgNPs-3MPS interaction with Ni2+ and Co2+ (in the range of 0.5–2.0 ppm) looks like based on the coordination compounds formation.

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Section: Introductionmentioning

confidence: 99%

Plasmonic Sensor Based on Interaction between Silver Nanoparticles and Ni2+ or Co2+ in Water

et al. 2018

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“…Recently, many sensors based on different nanosized materials have been developed, achieving a high sensitivity and selectivity for heavy metal ions 29–39 . Metal NP systems, for example, exhibit a pronounced LSPR effect, and this optical property can be monitored also in the presence of various types of contaminants, such as heavy metal ions 19,23 .…”

Section: Resultsmentioning

confidence: 99%

“…Recently, many sensors based on different nanosized materials have been developed, achieving a high sensitivity and selectivity for heavy metal ions. [29][30][31][32][33][34][35][36][37][38][39] Metal NP systems, for example, exhibit a pronounced LSPR effect, and this optical property can be monitored also in the presence of various types of contaminants, such as heavy metal ions. 19,23 In general, three parameters can change due to the contamination: energy peak position (maximum of the LSPR band), FWHM, and the band intensity.…”

Section: Application For Sensorsmentioning

confidence: 99%

X‐ray and UV photoelectron spectroscopy of Ag nanoclusters

Bolli

Mezzi

Burratti

et al. 2020

Surface & Interface Analysis

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The main purpose of the present work is to analyze a series of Ag nanoparticles (NPs) with different size or ligand functionalization by using X‐ray photoelectron spectroscopy (XPS) and to identify the differences in the band‐shape and energy peak position of photoemission spectra due to the particle dimension. A transmission electron microscopy characterization was performed, to verify the consistency of the results. Three types of samples were prepared starting from AgNO3 water solution and adding different capping agents. In the first two cases, the formation of NPs was promoted by the reduction of silver ions Ag+1 to metallic Ag0 through the addition of sodium borohydride, whereas in the last case, it was triggered by the exposure to UV light. Depending on the size of the NPs, a different physical behavior can be recognized. NPs with diameter of about 5 nm are characterized by the phenomenon of localized surface plasmon resonance (LSPR). The other type of samples having a diameter of about 1.5 nm presents discrete energy levels instead of electronic bands, and in this case, a typical fluorescence phenomenon can be observed. In the latter case, we can refer to such systems as nanoclusters. The XPS analyses were focused on the Ag 3D spectra looking for the possible shifts of the Ag doublet as a function of the particles size. The ultraviolet photoelectron spectroscopy with He II source was used for the investigation of possible changes in the valence band.

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“…This phenomenon is used in the application of gas sensing (9)(10)(11). The sensitivity of semiconductor against target gas can be improved by doping or making composite (12)(13)(14)(15) or by reducing their particles to nanosized (16,17) or by increasing operating temperature. Porous silicon (PSi) having distinctive physical and chemical properties which differ from single crystal Si properties.…”

Section: Introductionmentioning

confidence: 99%

“…In the PSi some part silicon crystals etched away by the electrochemical process make the silicon surface contains many pores. As a result, numerous and unusual physical phenomena can be observed (12,13).…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Fabrication of In2O3: CdO Nanoparticles for NO2 Gas Sensor

Journal¹

2018

Baghdad Sci.J

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The physical and morphological characteristics of porous silicon (PS) synthesized via gas sensor was assessed by electrochemical etching for a Si wafer in diluted HF acid in water (1:4) at different etching times and different currents. The morphology for PS wafers by AFM show that the average pore diameter varies from 48.63 to 72.54 nm with increasing etching time from 5 to 15min and from 72.54 to 51.37nm with increasing current from 10 to 30 mA. From the study, it was found that the gas sensitivity of In2O3: CdO semiconductor, against NO2 gas, directly correlated to the nanoparticles size, and its sensitivity increases with increasing operating temperature.

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Multifunctional nanoprobe based on upconversion nanoparticles for luminescent sensing and magnetic resonance imaging

Cited by 24 publications

References 33 publications

Plasmonic Sensor Based on Interaction between Silver Nanoparticles and Ni2+ or Co2+ in Water

Plasmonic Sensor Based on Interaction between Silver Nanoparticles and Ni2+ or Co2+ in Water

X‐ray and UV photoelectron spectroscopy of Ag nanoclusters

Synthesis and Fabrication of In2O3: CdO Nanoparticles for NO2 Gas Sensor

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