Carbon nanoparticles (CNPs) are among the most extensively researched and utilized nanomaterials due to a combination of unique optical and electronic properties. This work proposes an inexpensive and time-efficient green synthesis method for synthesizing fluorescent CNPs from the leaf extracts of Murraya koenigii, following a microwave-assisted approach. This work highlights the successful synthesis of CNPs using a single organic solvent throughout the procedure, without the use of any hazardous chemicals. They offer great dispersibility with water, ranging from 20-30 nm in size, as confirmed by scanning electron microscopy (SEM), with the maximum height observed at 1.92 nm, as confirmed by atomic force microscopy (AFM). The derived CNPs exhibited bright red fluorescence emission at 663 nm, as investigated by optical characterization. The chemical functional groups were investigated and interpreted using Fourier transform infrared (FTIR) and X-ray diffraction (XRD) spectroscopy. Further, the antioxidant assay was performed on derived CNPs with different concentrations, which exhibited excellent free radical scavenging properties. Moreover, the anti-bacterial activity was performed with E. coli and S. aureus, along with antioxidant assay. This work demonstrates a non-toxic and straightforward approach to promoting sustainable development by synthesizing CNPs using green leaf extracts. Nanoparticles possessing bright red fluorescence in the near-infrared (NIR) region opens up further scope of this work to contribute towards biomedical and plant health applications such as bioimaging, drug delivery, lateral root growth tests, and therapeutics.
Green synthesis of nanoparticles is widely accepted and appreciated mainly due to non-toxicity and excellent biocompatibility. We report a simple and cost-effective microwave-assisted approach for the fabrication of carbon nanoparticles (NPs) from petal extracts of white and pink Catharanthus roseus (commonly known as Baramasi), hence addressing them as BWNPs and BPNPs respectively. Both procedures resulted giving an average size of 22nm. They both exhibit green fluorescence under exposure to ultraviolet light, giving an absorption peak at 260nm. The topographic details were recorded using Atomic force microscopy, and the quasi-spherical shape and sizes were confirmed using scanning electron microscopy. Various functional groups were identified using Fourier transform infrared spectroscopy, and structural features along with crystallinity were investigated using X-ray diffraction. A time-efficient approach has been highlighted in this paper with the usage of a single solvent. These NPs can be potentially targeted for biomedical and plant health applications.
Green chemistry of fluorescent carbon nanoparticles (CNPs) from common sources such as leaves has gained significant interest due to their strong optical properties, and high photo stability. This paper highlights a microwave-assisted approach for the synthesis of carbon nanoparticles from the leaf extract of two plants Syzygium Cumini and Ocimum tenuiflorum, (commonly known as Jamun and Tulsi, so addressed here as JNPs and TNPs respectively), possessing various natural medicinal benefits, being addressed here as JNPs and TNPs. They exhibited an average size of 70 nm and emitted red fluorescence when exposed to ultraviolet light. The absorption spectra of both were recorded, alongside investigating functional groups using Fourier transform infrared spectroscopy. The average crystallite size for TNPs and JNPs is 23.63 nm and 28.35 nm were recorded using X-ray diffraction (XRD). Due to their excellent fluorescent property, they can be potentially used for drug delivery and therapy applications, thereby replacing the usage of conventional organic fluorescent molecules/dyes.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.