ABSTRACT There has been renewed interest in solar concentrators and optical antennas for improvements in photovoltaic energy harvesting and new optoelectronic devices. In this work, we

dielectrophoretically assemble single-walled carbon nanotubes (SWNTs) of homogeneous composition into aligned filaments that can exchange excitation energy, concentrating it to the centre of

core–shell structures with radial gradients in the optical bandgap. We find an unusually sharp, reversible decay in photoemission that occurs as such filaments are cycled from ambient

temperature to only 357 K, attributed to the strongly temperature-dependent second-order Auger process. Core–shell structures consisting of annular shells of mostly (6,5) SWNTs (_E_g=1.21 

concentrate excitons in unique ways. Access through your institution Buy or subscribe This is a preview of subscription content, access via your institution ACCESS OPTIONS Access through

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Read our FAQs * Contact customer support SIMILAR CONTENT BEING VIEWED BY OTHERS THERMAL AND NONTHERMAL EXCITON LIGHT EMISSIONS FROM CARBON NANOTUBES ABOVE 1000 K Article Open access 01 May

2025 RESONANT EXCITON TRANSFER IN MIXED-DIMENSIONAL HETEROSTRUCTURES FOR OVERCOMING DIMENSIONAL RESTRICTIONS IN OPTICAL PROCESSES Article Open access 09 December 2023 GIANT BULK PHOTOVOLTAIC

EFFECT DRIVEN BY THE WALL-TO-WALL CHARGE SHIFT IN WS2 NANOTUBES Article Open access 10 June 2022 REFERENCES * Currie, M. J., Mapel, J. K., Heidel, T. D., Goffri, S. & Baldo, M. A.

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W. _Light-Harvesting Antennas in Photosynthesis_, VOL. 13 (Kluwer Academic, 2003). Book  Google Scholar  Download references ACKNOWLEDGEMENTS M.S.S. is grateful for the NSF Career Award and

the Sloan Fellowship for supporting this work. A grant to M.S.S. from the Dupont-MIT Alliance is appreciated. J-H.H. acknowledges support from the Korea Research Foundation (MOEHRD,

KRF-2006-214-D00117). W-J.K. appreciates support from Kyungwon University. J.H.C. expresses his gratitude to Purdue University for financial support. The authors thank M. Zheng for useful 

discussions. AUTHOR INFORMATION Author notes * Jae-Hee Han and Geraldine L. C. Paulus: These authors contributed equally to this work AUTHORS AND AFFILIATIONS * Department of Chemical

Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Jae-Hee Han, Geraldine L. C. Paulus, Daniel A. Heller, Paul W. Barone, Chang Young Lee, Moon-Ho Ham, 

Changsik Song & Michael S. Strano * Institute for Soldier Nanotechnologies, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Jae-Hee Han, Chang Young Lee & 

Michael S. Strano * Advanced Material Laboratories, Sony Corporation, Kanagawa, 243-0021, Japan Ryuichiro Maruyama * Department of Energy and Biological Engineering, Kyungwon University,

Seongnam, Gyeonggi-do 461-701, South Korea Woo-Jae Kim * School of Mechanical Engineering, Birck Nanotechnology Center, Bindley Bioscience Center, Purdue University, West Lafayette, Indiana

47907, USA Jong Hyun Choi * Departamento de Fı´sica, Universidade Federal de Minas Gerais, Belo Horizonte, MG 30123-970, Brazil C. Fantini Authors * Jae-Hee Han View author publications You

can also search for this author inPubMed Google Scholar * Geraldine L. C. Paulus View author publications You can also search for this author inPubMed Google Scholar * Ryuichiro Maruyama

View author publications You can also search for this author inPubMed Google Scholar * Daniel A. Heller View author publications You can also search for this author inPubMed Google Scholar *

Woo-Jae Kim View author publications You can also search for this author inPubMed Google Scholar * Paul W. Barone View author publications You can also search for this author inPubMed 

Google Scholar * Chang Young Lee View author publications You can also search for this author inPubMed Google Scholar * Jong Hyun Choi View author publications You can also search for this

author inPubMed Google Scholar * Moon-Ho Ham View author publications You can also search for this author inPubMed Google Scholar * Changsik Song View author publications You can also search

for this author inPubMed Google Scholar * C. Fantini View author publications You can also search for this author inPubMed Google Scholar * Michael S. Strano View author publications You

can also search for this author inPubMed Google Scholar CONTRIBUTIONS M.S.S. and J-H.H. conceived and designed the experiments. J-H.H. and G.L.C.P. carried out the experiments and

theoretical calculation, and J-H.H., G.L.C.P. and M.S.S. analysed the data. D.A.H. designed and built the in-house dual-channel microscope. R.M., D.A.H., W-J.K., P.W.B., C.Y.L., J.H.C.,

M-H.H., C.S. and C.F. partly assisted in doing experiments and commented on the results. J-H.H., G.L.C.P. and M.S.S. wrote the paper. CORRESPONDING AUTHOR Correspondence to Michael S.

Strano. ETHICS DECLARATIONS COMPETING INTERESTS The authors declare no competing financial interests. SUPPLEMENTARY INFORMATION SUPPLEMENTARY INFORMATION Supplementary Information (PDF 966

kb) RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE Han, JH., Paulus, G., Maruyama, R. _et al._ Exciton antennas and concentrators from core–shell and

corrugated carbon nanotube filaments of homogeneous composition. _Nature Mater_ 9, 833–839 (2010). https://doi.org/10.1038/nmat2832 Download citation * Received: 10 December 2009 * Accepted:

13 July 2010 * Published: 12 September 2010 * Issue Date: October 2010 * DOI: https://doi.org/10.1038/nmat2832 SHARE THIS ARTICLE Anyone you share the following link with will be able to

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