Document Type

Journal Article

Department/Unit

Department of Physics

Title

Wafer-scale, three-dimensional helical porous thin films deposited at a glancing angle

Abstract

Minimization of helices opens a door to impose novel functions derived from the dimensional shrinkage of optical, mechanical and electronic devices. Glancing angle deposition (GLAD) enables one to deposit three-dimensional helical porous thin films (HPTFs) composed of separated spiral micro/nano-columns. GLAD integrates a series of advantageous features, including one-step deposition, wafer-scale production with mono-handedness of spirals, flexible engineering of spiral materials and dimensions, and the adaption to various kinds of substrates. Herein, we briefly review the fabrication of HPTFs by GLAD, specific growth mechanisms, physical properties in structures, mechanics and chiral optics, and the emerging applications in green energy. A prospective outlook is presented to illuminate some promising developments in enantioselection, bio-dynamic analyses, wirelessly-controlled drug delivery and mass production.

Publication Year

2014

Journal Title

Nanoscale

Volume number

6

Issue number

16

Publisher

Royal Society of Chemistry

First Page (page number)

9401

Last Page (page number)

9409

Referreed

1

Funder

The authors acknowledge Mr Benson Leung (Physics, HKBU) for his technical assistance in TEM (funded by SEG_HKBU06) and Mr Edward Chan (Physics, HKBU) for his technical support in x-ray diffraction. This work was financially supported by HKBU8/CRF/11E (GLAD; FB), NSFC/21473149 (FB, JHD), SKLP_14-15_P004 (FB), FRG2/13-14/018 (FB), NSFC/11304260 (JN) and FRG2/ 13-14/081 (JHD, JN).

DOI

10.1039/c4nr00249k

ISSN (print)

20403364

Link to Publisher’s Edition

http://dx.doi.org/10.1039/c4nr00249k

Keywords

silver nanospirals, chiroptical activity, circular dichroism, glancing-angle deposition, chiroplasmon

ISSN (electronic)

20403372

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