Highly fluorinated and photocrosslinkable liquid prepolymers for flexible optical waveguides

Surfactant-assisted reflux synthesis, characterization and formation mechanism of carbon nanotube/europium hydroxide core–shell nanowires

“…As we all know that CNT/Eu(OH) 3 can easily adsorb water molecules from the air due to hydrogen-bond formation on its surface [34], it is obvious that the peak at $100 8C with the first weight loss of $5 wt% for the obtained nanowires is due to the loss of adsorbed water [26][27][28]. The second weight loss stage with an exothermal peak at $250 8C suggests that a few basic europium carbonate may exist in the core-shell nanowires due to the formation of basic carbonate hydrolyzed from urea, which is similar to the previous reports [35,36]. The third weight loss stage with an exothermal peak at $320 8C suggests the decomposition of Eu(OH) 3 and SPS.…”

Synthesis and upconversion luminescence properties of monodisperse Y2O3:Yb, Ho spherical particles

“…Among above methods, homogeneous precipitation method not only has the advantages such as simple process and low production cost, but also is an effective way to synthesize spherical particles [17,18]. In the present work, we successfully prepared monodisperse spherical Y 2 O 3 :Yb, Ho particles with size in the range of 40-200 nm via a simple homogeneous precipitation method.…”

Highly luminescent, off-stoichiometric CuxInyS2/ZnS quantum dots for near-infrared fluorescence bio-imaging

“…The photoluminescence of Cu-rich CIS QDs originates from the recombinations of electrons and holes trapped in the defect states (Fig. [48][49][50] Furthermore, we measured the PLQY of NIRemitting QDs, which have an emission peak at 718.6 nm, using rhodamine B 49 to conrm the reliability of the PLQY determined with rhodamine 6G. 43 The PLQY of the QDs was determined by comparing the total emission intensity of the QDs with that of rhodamine 6G at an excitation wavelength of 500 nm.…”

“…43 The PLQY of the QDs was determined by comparing the total emission intensity of the QDs with that of rhodamine 6G at an excitation wavelength of 500 nm. During the ZnS passivation step, the size of the effective CIS core is reduced through the surface etching of the CIS core 30,48 or by the formation of an alloyed interfacial CIS/ZnS shell layer, 19,35,55 which can cause a blue shi of the absorption and emission peaks. Previous studies showed that a Cu-rich composition resulted in a low level of uorescence emission; 8,19,23 however, in the present work, it was found that the PLQY of the CIS QDs was not signicantly dependent on the Cu/ In ratio as shown in Fig.…”