Individually Dispersed Gold Nanoshell-Bearing Cellulose Nanocrystals with Tailorable Plasmon Resonance

Journal Article · Mon Mar 26 00:00:00 EDT 2018 · Langmuir

DOI:https://doi.org/10.1021/acs.langmuir.7b03868· OSTI ID:1651199

Semenikhin, Nikolay S. ^[1]; Kadasala, Naveen Reddy ^[2]; Moon, Robert J. ^[3]; Perry, Joseph W.  ^[1]; Sandhage, Kenneth H.  ^[2]

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1. Georgia Institute of Technology, Atlanta, GA (United States)
2. Purdue University, West Lafayette, IN (United States)
3. Georgia Institute of Technology, Atlanta, GA (United States); US Forest Service, Madison, WI (United States)

Cellulose nanocrystals (CNCs) can be attractive templates for the generation of functional inorganic/organic nanoparticles, given their fine sizes, aspect ratios, and sustainable worldwide availability in abundant quantities. Here we present for the first time a scalable, surfactant-free, tailorable wet chemical process for converting commercially-available CNCs into individual aspected gold nanoshell-bearing particles with tunable surface plasmon resonance bands. Using a rational cellulose functionalization approach, stable suspensions of positively-charged CNCs have been generated. Continuous, conductive, nanocrystalline gold coatings were then applied to the individual, electrostatically-stabilized CNCs via decoration with 1-3 nm diameter gold particles followed by electroless gold deposition. Optical analyses indicated that these core-shell nanoparticles exhibited two surface plasmon absorbance bands, with one located in the visible range (near 550 nm) and the other at near infrared wavelengths. Here, the near IR band possessed a peak maximum wavelength that could be tuned over a wide range (1000-1300 nm) by adjusting the gold coating thickness. The bandwidth and wavelength of the peak maximum of the near IR band were also sensitive to the particle size distribution and could be further refined by fractionation using viscosity gradient centrifugation.

• Research Organization: Purdue Univ., West Lafayette, IN (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: EE0007117; SC0014034
• OSTI ID: 1651199
• Journal Information: Langmuir, Vol. 34, Issue 15; ISSN 0743-7463
• Publisher: American Chemical Society
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
Coating materials
Metal nanoparticles
Plasmonic nanoparticles
Gold
Nanoparticles