Thin films of the perovskite barium tin oxide (BaSnO3) were prepared and characterized by their structural optical, electrical, and photoluminescent characteristics. Film deposition methods included both RF sputtering and pulsed laser deposition techniques. High quality, oriented films having optical bandgaps ranging between 3.7 eV & 4.4 eV were produced on various substrates. The undoped films...

A two-terminal semiconducting single-walled carbon nanotube (SC-SWNT) film in contact with an ionic liquid allows the realization of an extremely high density of holes, inducing a strong position-dependent electromodulation of the interband and excitonic transitions as a result of the position-dependent shift of the SWNT Fermi level. Electrical control of the optical transmission suggests appli...

We report, for the first time, the use of a single step deposition of semiconductor channel layer to simultaneously achieve both n- and p-type transport in transparent oxide thin film transistors (TFTs). This effect is achieved by controlling the concentration of hydroxyl groups (OH-groups) in the underlying gate dielectrics. The semiconducting tin oxide layer was deposited at room temperature,...

A description of how semiconducting fluorescent polymers function as chemosensors for a variety of chemical vapors is presented. Amplification is achieved by transport of optically induced excitations throughout a polymer film. Careful and thoughtful design of polymer chemical structures is crucial to achieving high sensitivity towards nitroaromatic explosives such as trinitrotoluene (TNT) and ...

The two-dimensional (2D) layered electronic materials of transition metal dichalcogenides (TMDCs) have been recently proposed as an emerging canddiate for spintronic applications. Here, we report the exfoliated single layer WS2-intelayer based spin valve effect in NiFe/WS2/Co junction from room temperature to 4.2 K. The ratio of relative magnetoresistance in spin valve effect increases from 0.1...

Related Articles Simultaneous measurement of thermal conductivity and heat capacity of bulk and thin film materials using frequency-dependent transient thermoreflectance method Rev. Sci. Instrum. 84, 034902 (2013) Onset of size effect in lattice thermal conductivity of thin films J. Appl. Phys. 113, 113511 (2013) Effects of valence-band mixing and strain on thermoelectric properties of p-type q...

Weak interactions between bromine, sulphur, and hydrogen are shown to stabilize 2D supramolecular monolayers at the liquid-solid interface. Three different thiophene-based semiconducting organic molecules assemble into close-packed ultrathin ordered layers. A combination of scanning tunneling microscopy (STM) and density functional theory (DFT) elucidates the interactions within the monolayer. ...

We show here a new phenomenon in La0.5Sr0.5TiO3/SrTiO3 (LSTO/STO) heterostructures; that is a coexistence of three-dimensional electron liquid (3DEL) and 2D electron gas (2DEG), separated by an intervening insulating LSTO layer. The two types of carriers were revealed through multi-channel analysis of the evolution of nonlinear Hall effect as a function of film thickness, temperature and back g...

Thin film growth of iron chalcogenides by pulsed laser deposition (PLD) is still a delicate issue in terms of simultaneous control of stoichiometry, texture, substrate/film interface properties, and superconducting properties. The high volatility of the constituents sharply limits optimal deposition temperatures to a narrow window and mainly challenges reproducibility for vacuum based methods. ...