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Search for "fluorophore" in Full Text gives 54 result(s) in Beilstein Journal of Nanotechnology.
Combining nanoscale manipulation with macroscale relocation of single quantum dots
Beilstein J. Nanotechnol. 2012, 3, 324–328, doi:10.3762/bjnano.3.36
- (SNOM) [1][2][3] and techniques based on adaptations of single-molecule spectroscopy [4], such as fluorescence imaging with one-nanometer accuracy (FIONA) [5], stochastic optical reconstruction microscopy (STORM) [6]. These techniques require the fluorophore under observation to be isolated by distances
- [13]. The gold nanoparticle was shown to dramatically quench the optical lifetime of the QD and to completely suppress its blinking. Experimental In this work, we position a single fluorophore, a CdSe QD, with nanometre precision on a macroscopic registration template, using automated atomic force
Distance dependence of near-field fluorescence enhancement and quenching of single quantum dots
Beilstein J. Nanotechnol. 2011, 2, 645–652, doi:10.3762/bjnano.2.68
- spectroscopy, energy transfer processes between single fluorophores and fluorophore quencher pairs play an important role in the investigation of molecular distances or orientations. At distances larger than about 3 nm these effects originate predominantly from dipolar coupling. As these experiments are
- ). At close proximity to the surface (<20 nm) we found a distinct decrease of the fluorescence emission, which was completely quenched at surface contact. This finding is attributed to energy transfer between the fluorophore and the gold tip. Analogous results for colloidal gold nanoparticles and
- dipolar coupling between the incident light and the gold tip leads to a field enhancement confined at the tip apex. Secondly, we have to consider the dipolar coupling between the fluorophore and the tip, which either leads to fluorescence enhancement due to resonant coupling or fluorescence quenching as a
Towards multiple readout application of plasmonic arrays
Beilstein J. Nanotechnol. 2011, 2, 501–508, doi:10.3762/bjnano.2.54
- to its complementary capture sequence. Thus, the formation of the DNA double helix was indicated by the fluorescence signal of the Cy3.5 label. The absorption and emission spectra of the fluorophore Cy3.5 and moreover the plasmonic profiles of the used gold nanorhomb arrays are depicted in Figure 5A
- to the spectral overlap of the plasmonic profile with the absorption spectrum of the dye, an enhanced excitation rate may be reached. Thus the fluorescence intensity is enhanced because the fluorophore is excited more often [32]. This mechanism may be the explanation for the signal increase seen with
- sample 1 and 2 for fluorescence measurements of Cy3.5. A further contribution to SEF is described as an enhanced decay rate that improves the quantum yield of the fluorophore and decreases the lifetime, which should allow the fluorophore to undergo more excitation–de-excitation cycles before
Novel acridone-modified MCM-41 type silica: Synthesis, characterization and fluorescence tuning
Beilstein J. Nanotechnol. 2011, 2, 284–292, doi:10.3762/bjnano.2.33
- bearing polycyclic aromatic compounds as terminal groups, Ar–(CH2)n–Si(OR)3 (n = 3, R = Me, Et), which may lead to interesting optical or electronic properties [4][5][6]. Acridone, being a well-known fluorophore used, e.g., for chemosensors [7], has previously been reported to be suitable for the pKa
- fluorescence intensity. Conclusion We have presented a novel fluorescent organosilane bearing an acridone fluorophore and its successful transformation into a MCM-41 type material via co-condensation with TEOS. As predicted, the hybrid material shows a change in its fluorescence properties when non-covalently
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