Cu and Ni ferrites as the semiconductor materials were synthesized by a microwave sol-gel auto-combustion method. Two cationic surfactants, sodium dodecyl sulfate (SDS) and cetyltrimethylammonium bromide (CTAB), were applied and the influence of surfactants on the properties of the Cu and Ni ferrite particles was studied. The samples were characterized by X-ray powder diffraction (XRD) pattern,...

We report on the interaction of Lewis acids with narrow band gap conjugated copolymers containing donor and acceptor units. Examination of the widely used poly[(4,4-bis(2-ethylhexyl)cyclopenta-[2,1-b:3,4-b']dithiophene)-2,6-(diyl-alt-benzo[2,1,3]thiadiazole)-4,7-diyl] (1) shows weaker binding with B(C(6)F(5))(3) when compared with a small molecule that contains a cyclopenta-[2,1-b:3,4-b']dithio...

Solid source molecular beam epitaxy has been used to grow random alloy quaternary InAlAsSb and ternary InGaSb alloys with a 6.2 Å lattice constant for use in electronic devices such as p-n junctions and heterojunction bipolar transistors HBTs . Several p-n hetrojunctions composed of p-type InGaSb and one of several different n-type InAlAsSb alloys have been fabricated and show good rectificatio...

Maximum modulation of light transmission occurs when an opaque medium is suddenly made transparent. This phenomenon occurs in atomic and molecular gases through different mechanisms1,2, whereas much room remains for further studies in solids3–5. A plasma is an illustrative system showing opacity for low-frequency light, and light–plasma interaction theory provides a universal framework to descr...

Recent advances in thin-film crystal-g:rowth techniques such as molecular-beam epitaxy (MBE) have enabled the fabrication of quantum-well devices, which consist of alternating layers of various crystalline solid materials so thin that the materials' combined quantum-mechanical properties override their individual bulk properties. By using MBE, we constructed a number of quantum-well devices tha...