Page 28 - ASME InterPACK 2017 Program

Invited Sessions

TRACK 1: HETEROGENEOUS INTEGRATION; MICROSYSTEMS
WITH DIVERSE FUNCTIONALITY

THURSDAY, AUGUST 31, 2017 9:15 am – 10:45 am
Room: Montgomery, Second Floor

1-2-2 New Frontiers in Materials – I

Session Organizer and Moderator: Prof. Ganpati Ramanath, Dr. Kaushik Mysore

This invited session will focus on tailoring novel multifunctional thin film, bulk and nanomaterials
and interfaces with control over multiple properties for emergent and conventional applications
in electronics packaging.

Dr. Mark Hersam Biography
Mark C. Hersam, is a Professor of Materials Science and Engineering, Chemistry, and Medicine
Northwestern and currently holds the Bette and Neison Harris Chair in Teaching Excellence at Northwestern
University University. His research interests include nanofabrication, scanning probe microscopy,
semiconductor surfaces and carbon nanomaterials. The paper is based on research that was
completed when he was a PhD student in the laboratory of Professor Joseph W Lyding at the
University of Illinois at Urbana-Champaign. Dr Nathan P Guisinger was an undergraduate
researcher at the time. Professor Lyding and Dr Guisinger remain active researchers today at
the University of Illinois at Urbana-Champaign and Argonne National Laboratory, respectively.

Processing and Applications of Two-Dimensional Nanomaterial Inks

Abstract
Two-dimensional nanomaterials have emerged as promising candidates for next-generation
electronics and optoelectronics [1,2], but advances in scalable nanomanufacturing are required
to exploit this potential in real-world technology. This talk will explore methods for improving the
uniformity of solution-processed two-dimensional nanomaterials with an eye toward realizing
dispersions and inks that can be deposited into large-area thin-films [3]. In particular, density
gradient ultracentrifugation allows the solution-based isolation of boron nitride [4], montmoril-
lonite [5], and transition metal dichalcogenides (e.g., MoS2, WS2, ReS2, MoSe2, WSe2) [6,7] with
homogeneous thickness down to the atomically thin limit. Similarly, two-dimensional black
phosphorus is isolated in organic solvents [8] or deoxygenated aqueous surfactant solutions [9]
with the resulting phosphorene nanosheets showing field-effect transistor mobilities and on/off
ratios that are comparable to micromechanically exfoliated flakes. By adding cellulosic polymer
stabilizers to these dispersions, the rheological properties can be tuned by orders of magni-
tude, thereby enabling two-dimensional nanomaterial inks that are compatible with a range of
additive manufacturing methods including inkjet [10], gravure [11], screen [12], and 3D printing
[13]. The resulting printed two-dimensional nanomaterial structures show promise in several
applications including photodiodes [14], anti-ambipolar transistors [15], gate-tunable memristors
[16], and heterojunction photovoltaics [17,18].

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