Fabrication of flexible paper‐based Surface‐enhanced Raman scattering substrate from Au nanocubes monolayer for trace detection of crystal violet on shell

Abstract

Surface‐enhanced Raman scattering (SERS) substrate is the key to SERS technology and it is still a basic focus to fabricate desirable SERS substrates offering multiple advantages of strong Raman enhancement and good reproducibility and portability. A flexible paper‐based SERS substrate were fabricated involving the use of Au nanocubes (NCs) monolayer. Au NCs were generated with tunable size in the range of 24 to 63 nm through seed‐mediated growth method. The effect of support on SERS properties of Au NCs–assembled monolayer was systemically explored. As a result, more excellent SERS performance could be obtained by assembling Au NCs on the filter paper. Besides, the influence of Au NCs' size on SERS‐enhanced effect of paper‐based substrate was also investigated. Our results clearly indicated that paper‐based substrate with 39 nm Au NCs possessed the optimal SERS enhancement. This SERS substrate exhibited high sensitivity with enhancement factor (EF) up to 9.75 × 107 and demonstrated good uniformity and time stability. Furthermore, based on this superior paper‐based SERS substrate with advantage of powerful sample extraction performance, the measurement of crystal violet (CV) on shell surface were successfully carried out with detection limit down to 2.17 × 10−7 M. And linear quantification were achieved in the range from 5 × 10−5 to 5 × 10−7 M. To sum up, the as‐prepared SERS substrate is applicable for on‐site detection and analysis of CV on various shell surfaces.

Recent advances in linear and nonlinear Raman spectroscopy. Part XIV

“…level due to the enrichment effect of the periodic structures and the hot spots generated between sandwich structures built on gold wells. Lin et al [ 18 ] described the fabrication of flexible paper‐based SERS substrates from a Au nanocubes monolayer for trace detection of crystal violet on shell. This SERS substrate exhibited high sensitivity with enhancement factors up to 9.75 × 10 7 and demonstrated uniformity and time stability.…”

Inkjet‐based microreactor for the synthesis of silver nanoparticles on plasmonic paper decorated with chitosan nano‐wrinkles for efficient on‐site Surface‐enhanced Raman Scattering (SERS)

“…Non-portable Non-resonant Crystal Violet 5 × 10 −7 9.75 × 10 7 9.56 % [36] Au@Ag nanocubes on mask paper AuNRs on bacterial nanocellulose…”

Zero→Two-Dimensional Metal Nanostructures: An Overview on Methods of Preparation, Characterization, Properties, and Applications

“…As a result, metal nanostructures are widely used in various fields with their unique electromagnetic properties, such as bio-cell label [ 40 ], sensing [ 41 , 42 , 43 , 44 ], as well as data storage and optoelectronics [ 45 , 46 , 47 ]. In addition, metal nanostructures assembled into various special structures have special research and application values due to the coupling effect of surface plasmon resonance [ 48 , 49 , 50 ]. A classic example is the metal nanostructures coupled with SERS, which effectively amplifies the Raman scattering signal (the amplification effect can currently reach 10 8 –10 10 orders of magnitude) due to the greatly enhanced local electric field.…”