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Assessing Effects of Near-Field Synergistic Light Absorption on Ordered Inorganic Phototropic Growth

Carim, Azhar I. and Meier, Madeline C. and Kennedy, Kathleen M. and Richter, Matthias H. and Hamann, Kathryn R. and Lewis, Nathan S. (2021) Assessing Effects of Near-Field Synergistic Light Absorption on Ordered Inorganic Phototropic Growth. Journal of the American Chemical Society, 143 (10). pp. 3693-3696. ISSN 0002-7863. doi:10.1021/jacs.0c13085.

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We report herein that synergistic light absorption in the optical near-field enables nanoscale self-organization during inorganic phototropic growth. Se–Te was grown electrochemically under illumination from an incoherent, unstructured light source in geometrically constrained, wavelength scale areas. Despite the limited dimensions, with as few as two discrete features produced in a single sub-micron dimension, the deposit morphology exhibited defined order and anisotropy. Computer modeling analysis of light absorption in simulated structures revealed a synergy wherein light capture in a nanoscale feature was enhanced by the presence of additional adjacent features, with the synergistic effect originating predominantly from nearest neighbor contributions. Modeling moreover indicated that synergistic absorption is produced by scattering of the incident illumination by individual nanoscale features, leading to a local increase in the near-field intensity and consequently increasing the absorption in neighboring features. The interplay between these optical processes establishes the basis for spontaneous order generation via inorganic phototropic growth.

Item Type:Article
Related URLs:
URLURL TypeDescription
Carim, Azhar I.0000-0003-3630-6872
Meier, Madeline C.0000-0003-1608-0810
Kennedy, Kathleen M.0000-0002-7125-4871
Richter, Matthias H.0000-0003-0091-2045
Hamann, Kathryn R.0000-0003-1163-7173
Lewis, Nathan S.0000-0001-5245-0538
Additional Information:© 2021 American Chemical Society. Received: December 18, 2020; Published: March 8, 2021. This work was supported by the National Science Foundation, Directorate for Mathematical & Physical Sciences, Division of Materials Research under Award Number DMR 1905963. The authors gratefully acknowledge J. R. Thompson and W.-H. Cheng for insightful discussions and R. Gerhart and N. Hart for assistance with photoelectrochemical cell fabrication. M.C.M. and K.R.H. acknowledge Graduate Research Fellowships from the National Science Foundation. M.C.M. also acknowledges the Resnick Sustainability Institute at Caltech for fellowship support. Author Contributions: A.I.C. and M.C.M. contributed equally. The authors declare no competing financial interest.
Group:Resnick Sustainability Institute
Funding AgencyGrant Number
NSF Graduate Research FellowshipUNSPECIFIED
Resnick Sustainability InstituteUNSPECIFIED
Subject Keywords:Morphology, Light absorption, Absorption, Toxicological synergy, Deposition
Issue or Number:10
Record Number:CaltechAUTHORS:20210311-085247183
Persistent URL:
Official Citation:Assessing Effects of Near-Field Synergistic Light Absorption on Ordered Inorganic Phototropic Growth. Azhar I. Carim, Madeline C. Meier, Kathleen M. Kennedy, Matthias H. Richter, Kathryn R. Hamann, and Nathan S. Lewis. Journal of the American Chemical Society 2021 143 (10), 3693-3696; DOI: 10.1021/jacs.0c13085
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:108391
Deposited By: Tony Diaz
Deposited On:11 Mar 2021 17:07
Last Modified:16 Nov 2021 19:11

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