One-step aqueous synthesis of graphene–CdTe quantum dot-composed nanosheet and its enhanced photoresponses

A new method for the preparation of a Fe3O4/graphene hybrid material and its applications in electromagnetic wave absorption

“…Both the μ′ and μ" values vary in the range of 1.05-1.32 and 0.04-0.23, respectively, whereas the values of the magnetic tangent loss (i.e., = " ) of the sample are 0.03-0.18, which is comparable to those of other magnetic materials [23]. It is thus suggested that the Fe 3 O 4 /graphene hybrid prepared in our study may have some degree of magnetic loss to EM waves over all of the tested frequencies (2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18). Fe 3 O 4 /graphene hybrids exhibit relatively high dielectric tangent loss and low magnetic tangent loss, suggesting that the electromagnetic loss mainly depends on the dielectric loss.…”

“…Graphene, a single layer of carbon atoms tightly packed into a two-dimensional honeycomb sp 2 carbon lattice, has recently attracted much attention because of its combination of excellent mechanical, electrical, thermal, and optical properties while exhibiting ultrathin thickness [1][2][3][4]. On the basis of its light weight, large surface area, and good chemical stability, graphene has become a nanoscale building block for new hybrid materials [5][6][7][8][9][10].…”

Flexible phototransistors based on graphene nanoribbon decorated with MoS2 nanoparticles

“…The displacement in the G band to 1540 cm -1 is and evidence of removing of the oxygnerated functional group after reduction process. In addition, a comparison of intensity ratio of I(D)/I(G) peaks is utilized to characterize the reduction of graphene oxide [48], whereas, the increase in this ratio is attributed to new graphitic domain generated during reduction of GO [49]. This relatively low intensity of I(D)/I(G) suggest the presence of nanoscopic hole in the graphene plane or small size of the sp 2 domains [50].…”

Metal Chalcogenide Hierarchical Nanostructures for Energy Conversion Devices

“…CdTe is a near-perfect material for PV application since it is a direct band gap semiconductor with a high optical absorption coefficient in the visible portion of the photon spectrum, and has a band gap of ~1.5 eV, which is closely matched to the terrestrial solar spectrum for optimum conversion efficiency [58]. Lu et al used a graphene layer to improve PV efficiency of CdTe QDs [59]. Figure 9.38 shows Lu and co-workers' QD-composed nanosheet.…”