Silver vanadate nanoribbons: A label-free bioindicator in the conversion between human serum transferrin and apotransferrin via surface-enhanced Raman scattering

Abstract

Silver vanadate nanoribbons were synthesized via a hydrothermal process, which exhibited surface-enhanced Raman scattering effect. This surface-enhanced substrate was stable and reproducible for identifying human serum transferrin and human serum apotransferrin in the concentration of 1×10−5 M, which further exhibited significant sensitivity in monitoring the conversion of these two proteins in turn. This result showed that the silver vanadate nanoribbon might be employed as biomonitor in such systems.

Synthesis of β-AgVO3 nanowires by hydrothermal and precipitation routes: a comparative study

“…All samples presented peaks related to formation of β-AgVO 3 . The most intense peak at 884 cm −1 can be attributed to stretching vibrations of V-O-Ag, Ag-O-Ag and O-V-O [24][25][26][27][28]. That band at 840 cm −1 is related to the stretching vibrations of V-O groups in (V 2 O 7 ) −4 ion or to Ag-O-V stretching vibrations [24,27,28].…”

“…The most intense peak at 884 cm −1 can be attributed to stretching vibrations of V-O-Ag, Ag-O-Ag and O-V-O [24][25][26][27][28]. That band at 840 cm −1 is related to the stretching vibrations of V-O groups in (V 2 O 7 ) −4 ion or to Ag-O-V stretching vibrations [24,27,28]. The band at 805 cm −1 is associated with stretching vibrations of Ag-O-Ag bridges [25,27,28], while that band at 728 cm −1 is related to VO 4 deformation modes [24][25][26][27].…”

“…That band at 840 cm −1 is related to the stretching vibrations of V-O groups in (V 2 O 7 ) −4 ion or to Ag-O-V stretching vibrations [24,27,28]. The band at 805 cm −1 is associated with stretching vibrations of Ag-O-Ag bridges [25,27,28], while that band at 728 cm −1 is related to VO 4 deformation modes [24][25][26][27]. The stretching vibrations of Ag-O-V and asymmetric stretching of V-O-V in the polymeric chains of metavanadate are assigned to bands at 701 and 515 cm −1 [24][25][26][27][28].…”

“…The band at 805 cm −1 is associated with stretching vibrations of Ag-O-Ag bridges [25,27,28], while that band at 728 cm −1 is related to VO 4 deformation modes [24][25][26][27]. The stretching vibrations of Ag-O-V and asymmetric stretching of V-O-V in the polymeric chains of metavanadate are assigned to bands at 701 and 515 cm −1 [24][25][26][27][28]. Raman bands at 384 and 334 cm −1 are attributed to the asymmetric deformation of VO 4 3− tetrahedron [29,30].…”

Photoinduced absorption measurement on a microchip equipped with organic dye-doped polymer waveguide

“…This provokes troublesome procedures in the measurement, and gives a limitation in the type of substance to be measured. Therefore, various kinds of label-free sensing have been investigated intensively such as absorption [8,9], interference [10,11], and Raman scattering [12,13] spectroscopies. As found in these methods except for the Raman scattering spectroscopy, one can find that the most important issue for the optical label-free sensing on a compact microchip is the use of incoherent light with the broad spectrum as the probe light.…”