Sr- and Mg-doped LaGaO3 powders with various dopant concentrations (La1 - x Sr x Ga1 - y Mg y O3 - ( x + y )/2 where 0.02 ≤ x ≤ 0.2 and 0.02 ≤ y ≤ 0.2) were synthesized through a novel solution combustion route. X-ray diffraction patterns indicate orthorhombic structure for compositions 0 ≤ x ≤ 0.075 and 0 ≤ y ≤ 0.075 and primitive − cubic for 0.1 ≤ x ≤ 0.2 and 0.1 ≤ y ≤ 0.2. Thin films of La1 - x Sr x Ga1 - y Mg y O3 - ( x + y )/2 (0.1 ≤ x ≤ 0.2 and 0.1 ≤ y ≤ 0.2) were deposited using both Nd:YAG (532 nm) and excimer (248 nm) lasers. The as-deposited films at room temperature were amorphous, which on annealing at 973 K exhibited single-phase cubic structure. Films deposited with excimer laser were smooth and particulate free compared to Nd:YAG laser deposition. The LSGM films on Si[111] and sapphire[0001] substrates showed good surface morphology compared to films on MgO[001] and amorphous quartz. Films were found to be slightly rich in Sr/La ratio compared to target composition. O+, O, Ga+, Ga, and La+ were the major species in the laser ablation plume with ion and neutral velocities of 3 × 105 and 3 × 104 cm/s, respectively.

A 2D 10-element test microbolometer array was fabricated without an air-gap thermal isolation structure. The microbolometer uses vanadium oxide film deposited by pulsed laser deposition at room temperature as the infrared (IR) sensitive layer. The IR response of the uncooled microbolometer was evaluated in the spectral region of 8-15 µm. The detectivity and the responsivity were determined as ∼6 × 10 5 cm Hz 1/2 W −1 and 36 V W −1 respectively at a 10 Hz chopper frequency with 50 µA bias current for a thermal conductance G ∼ 10 −3 W K −1 between the thermal sensing layer and the substrate. The preliminary results for the test microbolometer array are discussed and compared with those for microbolometers fabricated on micromachined thermally isolated structures.

Magnetite nanoparticles (Fe 3 O 4 ) decorated reduced graphene oxide (rGO) composite was synthesized by the solvothermal method and utilized as a potential adsorbent for the removal of cesium (Cs + ) and strontium (Sr 2+ ) ions from aqueous solution. The effects of adsorbate concentration and reaction time on the removal efficiencies of Cs + and Sr 2+ were investigated. The adsorption capacity increases as the initial concentration of Cs + /Sr 2+ increased from 1 to 170 mg/L, which might be due to the more available adsorption sites, and the adsorbent reached equilibrium at 360 min. The adsorption isotherm was fitted to the Freundlich model with maximum adsorption capacities of Cs + and Sr 2+ being 128.2 and 384.6 mg g −1 , respectively. The kinetic study showed that the adsorption behavior followed pseudo-second-order kinetics. The rGO/Fe 3 O 4 nanocomposite showed excellent selectivity toward Cs + and Sr 2+ even in the presence of competitive cations (Na + , K + , and Mg 2+ ) having a higher concentration.

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