Presentation Title

Mechanical Exfoliation of 2D Nanomaterials Using Simple Machines

Start Date

November 2016

End Date

November 2016

Location

HUB 302-97

Type of Presentation

Poster

Abstract

Synthesis and characterization of 2D nanomaterials such as graphene and hexagonal boron nitride (h-BN) is an expanding field of research within materials science and condensed-matter physics with a diverse array of applications. These materials are used to build heterostructures with finely tuned optoelectronic properties. The traditional mechanical exfoliation of nanomaterials via the adhesive tape method is highly unpredictable and inconsistent for producing high quality samples. Using LEGO® for rapid prototyping, we set out to correct these inconsistencies and created the Nanomaterial Exfoliator (NE). Using a system of LEGO® gears and building blocks, the NE functions by mechanically turning a gear which powers the machine to exfoliate nanomaterials via adhesive tape. This method utilizes constant pressure and rate to produce thin graphene and h-BN flakes. The NE produces nanomaterials that have significantly more high quality flakes than are obtained using the traditional adhesive tape method. Raman spectroscopy confirms the validity of the NE method as a better alternative to the adhesive tape method. The ultimate goal of this project is to fully automate the mechanical exfoliation process, produce samples on larger SiO2 substrates, and control pressure, rate, temperature, and exfoliation angle in order to produce the highest possible quality nanomaterial flakes.

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Nov 12th, 1:00 PM Nov 12th, 2:00 PM

Mechanical Exfoliation of 2D Nanomaterials Using Simple Machines

HUB 302-97

Synthesis and characterization of 2D nanomaterials such as graphene and hexagonal boron nitride (h-BN) is an expanding field of research within materials science and condensed-matter physics with a diverse array of applications. These materials are used to build heterostructures with finely tuned optoelectronic properties. The traditional mechanical exfoliation of nanomaterials via the adhesive tape method is highly unpredictable and inconsistent for producing high quality samples. Using LEGO® for rapid prototyping, we set out to correct these inconsistencies and created the Nanomaterial Exfoliator (NE). Using a system of LEGO® gears and building blocks, the NE functions by mechanically turning a gear which powers the machine to exfoliate nanomaterials via adhesive tape. This method utilizes constant pressure and rate to produce thin graphene and h-BN flakes. The NE produces nanomaterials that have significantly more high quality flakes than are obtained using the traditional adhesive tape method. Raman spectroscopy confirms the validity of the NE method as a better alternative to the adhesive tape method. The ultimate goal of this project is to fully automate the mechanical exfoliation process, produce samples on larger SiO2 substrates, and control pressure, rate, temperature, and exfoliation angle in order to produce the highest possible quality nanomaterial flakes.