TY - JOUR
T1 - Construction of ultra-sensitive surface-enhanced Raman scattering substrates based on 3D graphene oxide aerogels
AU - Liu, Wei
AU - Wang, Zihan
AU - Yan, Wenqian
AU - Zhao, Zhiyang
AU - Shi, Lingyan
AU - Huang, Longjin
AU - Liu, Yu
AU - He, Xuan
AU - Cui, Sheng
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2023/1/15
Y1 - 2023/1/15
N2 - Graphene-enhanced Raman scattering was an attractive Raman enhanced technique and has made remarkable progress in food safety, environmental monitoring, and bioanalysis. However, novel three-dimensional (3D) graphene materials had not been explored as SERS substrates. Here, 3D graphene oxide aerogels (GOA) were constructed and used as ultra-sensitive SERS substrates. In a hydrothermal environment, GO nanosheets were self-assembled into GO hydrogel and then combined with freeze-drying to obtain GOA. The optimized GOA had a high SERS enhancement factor (3.1 × 104) and a low detection limit (10−8 M) for the dye molecules. The excellent SERS effect was attributed to the large specific surface area of GOA, which facilitated molecular adsorption and formed abundant 3D hot spots. In addition, benefiting from the electron transfer promoted by the reduction of the band gap energy, synergistically enhanced the SERS effect. This work expands the applications of graphene oxide aerogels and provides valuable insights for designing novel 3D SERS substrates.
AB - Graphene-enhanced Raman scattering was an attractive Raman enhanced technique and has made remarkable progress in food safety, environmental monitoring, and bioanalysis. However, novel three-dimensional (3D) graphene materials had not been explored as SERS substrates. Here, 3D graphene oxide aerogels (GOA) were constructed and used as ultra-sensitive SERS substrates. In a hydrothermal environment, GO nanosheets were self-assembled into GO hydrogel and then combined with freeze-drying to obtain GOA. The optimized GOA had a high SERS enhancement factor (3.1 × 104) and a low detection limit (10−8 M) for the dye molecules. The excellent SERS effect was attributed to the large specific surface area of GOA, which facilitated molecular adsorption and formed abundant 3D hot spots. In addition, benefiting from the electron transfer promoted by the reduction of the band gap energy, synergistically enhanced the SERS effect. This work expands the applications of graphene oxide aerogels and provides valuable insights for designing novel 3D SERS substrates.
KW - 3D construction
KW - Graphene oxide aerogel
KW - Surface-enhanced Raman scattering
KW - Three-dimensional substrate
UR - http://www.scopus.com/inward/record.url?scp=85141474015&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2022.11.001
DO - 10.1016/j.carbon.2022.11.001
M3 - 文章
AN - SCOPUS:85141474015
SN - 0008-6223
VL - 202
SP - 389
EP - 397
JO - Carbon
JF - Carbon
ER -