Journal article
Designing Strong Optical Absorbers via Continuous Tuning of Interparticle Interaction in Colloidal Gold Nanocrystal Assemblies
ACS nano, v 13(7), pp 7493-7501
01 Jul 2019
PMID: 31136152
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
We program the optical properties of colloidal Au nanocrystal (NC) assemblies via an unconventional ligand hybridization (LH) strategy to precisely engineer interparticle interactions and design materials with optical properties difficult or impossible to achieve in bulk form. Long-chain hydrocarbon ligands used in NC synthesis are partially exchanged, from 0% to 100%, with compact thiocyanate ligands by controlling the reaction time for exchange. The resulting NC assemblies show transmittance, reflectance, optical permittivity, and direct current (DC) resistivity that continuously traverse a dielectric-metal transition, providing analog tuning of their physical properties, unlike the digital control realized by complete exchange with ligands of varying length. Exploiting this LH strategy, we create Au NC assemblies that are strong, ultrathin film optical absorbers, as seen by a 6x increase in the extinction of infrared light compared to that in bulk Au thin films and by a temperature rise of 20 degrees C upon illumination with 808 nm light. Our LH strategy may be applied to the design of materials constructed from NCs of different size, shape, and composition for specific applications.
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Details
- Title
- Designing Strong Optical Absorbers via Continuous Tuning of Interparticle Interaction in Colloidal Gold Nanocrystal Assemblies
- Creators
- Wenxiang Chen - Univ Penn, Dept Elect & Syst Engn, Philadelphia, PA 19104 USAJiacen Guo - Univ Penn, Dept Mat Sci & Engn, 3231 Walnut St, Philadelphia, PA 19104 USAQinghua Zhao - Univ Penn, Dept Chem, Philadelphia, PA 19104 USAPrashanth Gopalan - Univ Penn, Dept Mat Sci & Engn, 3231 Walnut St, Philadelphia, PA 19104 USAAaron T. Fafarman - Drexel UniversityAustin Keller - Univ Penn, Dept Mat Sci & Engn, 3231 Walnut St, Philadelphia, PA 19104 USAMingliang Zhang - Univ Penn, Dept Elect & Syst Engn, Philadelphia, PA 19104 USAYaoting Wu - Univ Penn, Dept Chem, Philadelphia, PA 19104 USAChristopher B. Murray - Univ Penn, Dept Mat Sci & Engn, 3231 Walnut St, Philadelphia, PA 19104 USACherie R. Kagan - Univ Penn, Dept Elect & Syst Engn, Philadelphia, PA 19104 USA
- Publication Details
- ACS nano, v 13(7), pp 7493-7501
- Publisher
- American Chemical Society; Washington, DC
- Number of pages
- 9
- Grant note
- CMMI-1562884 / National Science Foundation (NSF) DMR-1720530 / NSF MRSEC; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS) ONR N00014-18-1-2497 / Office of Naval Research Multidisciplinary University Research Initiative Award; MURI
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000477786400015
- Scopus ID
- 2-s2.0-85070421468
- Other Identifier
- 991019169104104721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology