NanoFrazor Webinar Series 2024/2025Strained 2D Lateral Heterojunctions via Grayscale t-SPL

In this session, Dr. Giorgio Zambito from the University of Genoa will explore how grayscale thermal scanning probe lithography (t-SPL) is revolutionizing strain engineering in 2D materials, enabling precise control over electronic and optical properties at the nanoscale.

Transition Metal Dichalcogenides (TMDs) like MoS₂ have gained significant attention for their applications in ultrathin optoelectronic and quantum devices. However, engineering lateral heterojunctions to control their properties remains a key challenge. This webinar will introduce a novel approach using grayscale patterning via t-SPL to fabricate deterministic nanoscale templates that enable periodic strain engineering of 2D materials.

Key Topics Covered:

• How grayscale t-SPL enables precise shaping of 2D materials at high resolution.

• The role of periodic strain engineering in tuning electronic and optical properties.

• Experimental results demonstrating nanoscale modulation of electrical surface potential using Kelvin Probe Force Microscopy (KPFM).

• Creation of lateral Au-MoS₂ nano-heterojunctions with alternating Schottky and Ohmic responses, opening new possibilities for strain-engineered optoelectronic architectures.

This session is ideal for researchers and professionals working in nanotechnology, optoelectronics, and 2D materials.

a) Schematic view of the t-SPL grayscale lithography process. b) 3D view of the measured AFM topography of a faceted pattern. c) Sketch of a transferred 2D MoS₂ flake on a faceted template.

Read the full abstract here.

Session Details:

Date: Thursday, February 20, 2025

Time: 4:00–5:00 PM (CET)

The link to the webinar on MS Teams will be sent to you after registration.

About Giorgio Zambito

Graduated in Physics from the University of Genoa, in his master’s thesis he focused on the large-area growth of 2D Transition Metal Dichalcogenides (TMDs) via physical processes and their nanomanipulation. This work also introduced him to nanolithography techniques, particularly through the NanoFrazor tool implemented at the UniGe facility in 2020. During his PhD, he explored the integration of thermal-Scanning Probe Lithography (t-SPL) with large-area TMDs growth to develop 2D semiconducting deterministic nanocircuitry, grayscale-engineered 2D TMDs layers, and hybrid plasmonic-TMDs nanostructures.

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