In contrast to conventional surface-enhanced Raman scattering (SERS) platforms implemented on non-biological substrates, silk fibroin has the unique advantages of long-term biosafety and controllable biodegradability for in vitro and in vivo biomedical applications, as well as flexibility and process-compatibility. In this study, a silk fibroin film was developed to fabricate a flexible SERS sensor template with nanogap-rich gold nanoislands. The proposed biological SERS platform presents fairly good enhancements in detection performance such as detection limit, sensitivity, and signal-to-noise ratio. In particular, the sensitivity improvement was by more than 10 times compared to that of the counterpart sample, and an excellent spatial reproducibility of 2.8% was achieved. In addition, the near-field calculation results were consistent with the experimental results, and the effect of surface roughness of the silk substrate was investigated in a quantitative way. It is believed that biological SERS-active sensors could provide the potential for highly sensitive, cost-effective, and easily customizable nanophotonic platforms that include new capabilities for future healthcare devices.
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http://dx.doi.org/10.1364/OE.452665 | DOI Listing |
Adv Healthc Mater
December 2024
School of Perfume and Aroma Technology, Shanghai Institute of Technology Shanghai, Shanghai, 201418, China.
Precise and continuous monitoring of blood pressure and cardiac function is of great importance for early diagnosis and timely treatment of cardiovascular diseases. The common tests rely on on-site diagnosis and bulky equipments, hindering early diagnosis. The emerging hydrogels have gained considerable attention in skin bioelectronics by virtue of the similarities to biological tissues and versatility in mechanical, electrical, and biofunctional engineering.
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
Department of Orthopedics, Peking University Third Hospital, Beijing, China; Engineering Research Center of Bone and Joint Precision Medicine, Beijing, China. Electronic address:
The repair of diabetic bone defects is still filled with enormous challenges. Excessive reactive oxygen species (ROS) are regenerated in diabetic bone defect sites which is harmful to bone regeneration. Therefore, it's to a good strategy to scavenge the excess ROS to provide a friendly environment for diabetic bone defects repair.
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
Department of Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran; Nanotechnology Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran; Leicester School of Pharmacy, De Montfort University, Leicester, UK. Electronic address:
A promising new approach to mitigate the adverse effects of chemotherapeutic drugs on healthy tissues involves combining sonodynamic therapy with topical chemotherapy to enhance the therapeutic efficacy of anticancer drugs. In this study, we introduce a multi-functional in situ chitosan hydrogel (CS) containing silk fibroin nanoparticles (SFNPs) loaded with doxorubicin (DOXSFNPs) and CuO/TiO nanoparticles (CTNPs) for combination therapy. The developed DOXSFNPs exhibited a size of 257 ± 6 nm, a zeta potential of -14.
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
National Engineering Research Center for Healthcare Devices, Guangdong Provincial Key Laboratory of Medical Electronic Instruments and Materials, Institute of Biological and Medical Engineering, Guangdong Academy of Sciences, Guangzhou 510316, China; Engineering Research Center of Artificial Organs and Materials, Ministry of Education, Jinan University, Guangzhou 510632, China. Electronic address:
Persistent bleeding and limited repair capacity greatly threaten patients with bone destruction. Designing inorganic-organic biomimetic scaffolds with quick hemostasis and osteogenesis functions will solve this problem. A novel degradable and naringin (NG) loaded porous scaffold (SCB-N) based on APTES-modified bioactive glass (ABG), carboxymethyl chitosan and silk fibroin is developed.
View Article and Find Full Text PDFMaterials (Basel)
November 2024
Department of Biomedical Engineering, Yonsei University, Wonju 26493, Republic of Korea.
silk fibroin is a promising biopolymer with notable mechanical strength, biocompatibility, and potential for diverse biomedical applications, such as tissue engineering scaffolds, and drug delivery. These properties are intrinsically linked to the structural characteristics of silk fibroin, making it essential to understand its molecular stability under varying environmental conditions. This study employed molecular dynamics simulations to examine the structural stability of silk I and silk II conformations of silk fibroin under changes in temperature (298 K to 378 K) and pressure (0.
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