UNIVAQ - 2DEGAS

 

 

 

Prof. Maurizio Passacantando

 

Prof. Luca Lozzi

 

 

 

 

The UNIAQ research unity investigates growth, surfaces/interfaces, and transport in low-dimensional materials and nanodevices, coupling device fabrication with advanced microscopy and photoemission. UNIAQ work spans chemoresistive gas sensing, field emission, and opto/electronic transduction, leveraging XPS/UPS, STM/AFM, SEM, XRD, and electrical I–V/field-emission measurements to correlate structure with function. The investigated systems comprise:

 

·         WS₂ nanotube devices and heterostructures with graphene

 

·         Electrospun metal-oxide nanofibers (WO₃, TiO₂)

 

·         Carbon nanostructures (CNTs, graphene)

 

·          TMD nanostructures (MoS₂ nanoflowers/bilayers)

 

Other research areas covered by the Unit include surface and interface physics of ultrathin films and metal–organic interfaces for organic/optoelectronic devices, exploiting a comprehensive toolkit (XPS/UPS, LEED, STM/AFM).

• ZEISS LEO 1530 (FE-SEM) with Kleindiek micromanipulators – Field-emission SEM for high-resolution imaging and in-situ electrical probing.

0.1–30 kV; ~1.0 nm resolution @ 30 kV; InLens/SE detectors; in-situ micro/nano-probing Kleindiek (MM3A-EM).

• Oxford Instruments X-ACT 100 (EDS) – Silicon drift detector for SEM-EDS microanalysis. ~125 eV (Mn Kα) energy resolution; Be–Pu detection range; LN₂-free operation; INCA/AZtec software.

• Bruker D8 ADVANCE (XRD) – θ–2θ powder diffractometer for phase and texture analysis. Cu Kα configuration; step size down to 0.0001°; LYNXEYE 1D detector.

• Perkin-Elmer PHI ESCA (XPS) – Surface chemical analysis with hemispherical analyzer.

• Keithley 236 (SMU) – Four-quadrant source-measure unit for I-V characterization. ±110 V, ±100 mA; current sensitivity down to ~10 fA; GPIB interface.

• CVD Tube Furnaces (horizontal, compact setup)