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Title: Layer-by-Layer Sorting of Rhenium Disulfide via High-Density Isopycnic Density Gradient Ultracentrifugation

Journal Article · · Nano Letters

Isopycnic density gradient ultracentrifugation (iDGU) has been widely applied to sort nanomaterials by their physical and electronic structure. Yet, the commonly used density-gradient medium iodixanol has a finite maximum buoyant density that prevents the use of iDGU for high-density nanomaterials. Here, we overcome this limit by adding cesium chloride (CsCl) to iodixanol, thus increasing its maximum buoyant density to the point where the high-density two-dimensional nanomaterial rhenium disulfide (ReS2) can be sorted in a layer-by-layer manner with iDGU. The resulting aqueous ReS2 dispersions show photoluminescence at ~1.5 eV, which is consistent with its direct bandgap semiconductor electronic structure. Moreover, photocurrent measurements on thin films formed from solution-processed ReS2 show a spectral response that is consistent with optical absorbance and photoluminescence data. In addition to offering a pathway for effective solution processing of ReS2, this work establishes a general methodology for sorting high-density nanomaterials via iDGU.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Argonne-Northwestern Solar Energy Research Center (ANSER)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); US Department of the Navy, Office of Naval Research (ONR)
Grant/Contract Number:
SC0001059; DMR-1505849; DMR-1121262; N00014-14-1-0669
OSTI ID:
1388164
Journal Information:
Nano Letters, Vol. 16, Issue 11; Related Information: ANSER partners with Northwestern University (lead); Argonne National Laboratory; University of Chicago; University of Illinois, Urbana-Champaign; Yale University; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 50 works
Citation information provided by
Web of Science

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Cited By (12)

Perspective: 2D for beyond CMOS journal May 2018
Solution-Based Processing of Optoelectronically Active Indium Selenide journal August 2018
Production and processing of graphene and related materials journal January 2020
Advent of 2D Rhenium Disulfide (ReS 2 ): Fundamentals to Applications journal January 2017
3D Anisotropic Thermal Conductivity of Exfoliated Rhenium Disulfide journal July 2017
Nanosized ReS 2 Monolayers Embedded in Nitrogen‐Doped Carbon Nanotubes for High‐Rate Capacitive Lithium Storage journal February 2019
Extending the Colloidal Transition Metal Dichalcogenide Library to ReS 2 Nanosheets for Application in Gas Sensing and Electrocatalysis journal December 2019
2D–Organic Hybrid Heterostructures for Optoelectronic Applications journal February 2019
Functional inks and printing of two-dimensional materials. text January 2018
Production and processing of graphene and related materials text January 2020
Production and processing of graphene and related materials text January 2020
Extending the colloidal transition metal dichalcogenide library to ReS2 nanosheets for application in gas sensing and electrocatalysis text January 2020