A5040986547- Biosensors and Analytical Detection
- Advanced Chemical Sensor Technologies
- Photonic Crystals and Applications
- Optical Imaging and Spectroscopy Techniques
- Advanced Fiber Laser Technologies
- Random lasers and scattering media
- Optical Coherence Tomography Applications
- Laser-Matter Interactions and Applications
- Laser Applications in Dentistry and Medicine
- Cystic Fibrosis Research Advances
- Advanced Biosensing Techniques and Applications
- Electrospun Nanofibers in Biomedical Applications
- Leaf Properties and Growth Measurement
- Plant Pathogens and Fungal Diseases
- Spectroscopy Techniques in Biomedical and Chemical Research
- Photonic and Optical Devices
- Photodynamic Therapy Research Studies
- Analytical Chemistry and Sensors
- Microfluidic and Capillary Electrophoresis Applications
- Semiconductor Lasers and Optical Devices
- Solid State Laser Technologies
- Non-Invasive Vital Sign Monitoring
- Air Quality Monitoring and Forecasting
- Spectroscopy and Chemometric Analyses
- Metamaterials and Metasurfaces Applications
Pennsylvania State University
2015-2023
Park University
2015
We report a smartphone spectrometer with nanometer resolution working in the visible range. A G-Fresnel device dual functionality of focusing and dispersion is used to enable miniaturization. Proof principle application Bradford assay protein concentration also demonstrated.
We report a miniature, visible to near infrared G-Fresnel spectrometer that contains complete spectrograph system, including the detection hardware and connects with smartphone through microUSB port for operational control. The is able achieve resolution of ~5 nm in wavelength range from 400 1000 nm. further developed diffuse reflectance spectroscopy system using demonstrated capability hemoglobin measurement. Proof concept studies tissue phantoms yielded mean error 9.2% on concentration...
We report on the use of leaf diffuse reflectance spectroscopy for plant disease detection. A smartphone-operated, compact diffused spectrophotometer is used field collection spectra to enable pre-symptomatic detection progression potato late blight post inoculation with oomycete pathogen Phytophthora infestans. Neural-network-based analysis predicts infection >96% accuracy, only 24 h after pathogen, and nine days before visual symptoms appear. Our study demonstrates potential using portable...
Top-down fabrication is commonly used to provide positioning control of optical structures; yet, it places stringent limitations on component materials, and oftentimes, dynamic reconfigurability challenging realize. Here, we present a reconfigurable nanoparticle platform that can integrate heterogeneous particle assembly different shapes, sizes, chemical compositions. We demonstrate disorder in this use tune random laser emission characteristics for suspension titanium dioxide nanowires dye...
Halides play important roles in human health and environmental monitoring. However, different halides interfere with each other current measurement methods. Simultaneous sensing of multiple a fast low-cost manner remains challenge. Here, we report fluorometric multi-halide method by using single citrate-based fluorophore, CA-Cys, on custom-made portable device. The fluorescence emitted CA-Cys is quenched due to the dynamic quenching halide ions; sensitivities vary from types pH, providing...
A versatile, broadly tunable, power scalable, multi-line, ultrafast source is presented, the operation of which based on combining principles pulse division with phenomenon soliton self-frequency shift (SSFS). Interferometric recombination demonstrated showing that can decouple generally limiting relationship between output and center wavelength in SSFS-based optical sources. Broadly tunable two- four-color shifted pulses are experimentally demonstrated. Simultaneous dual-polarization...
Biocompatible and even biodegradable polymers have unique advantages in various biomedical applications. Recent years, photonic devices fabricated using biocompatible been widely studied. In this work, we manufactured an optical fiber polymer POC POMC. This step index is flexible easy to handle. Light was coupled into by directly objective. The has a good light guiding property approximate loss of 2db/cm. Due the two layer structure, our able support applications inside biological tissue....
We presented a broadly tunable, power scalable, multi-line, ultrafast source. The source is based on combining principles of pulse division with the phenomenon soliton self-frequency shift. By using this system, interferometric recombination demonstrated showing that can decouple generally limiting relationship between output and center wavelength in shift optical sources. Broadly tunable multi-color shifted pulses are experimentally demonstrated. Simultaneous dual-polarization second...
Chloride level in sweat is a major diagnostic criterion for cystic fibrosis (CF) and many other health conditions. In an effort to develop low cost, point-of-care diagnostics system chloride concentration measurement, we demonstrated smartphone-based chloridometer measure by using our recently developed fluorescence sensor. We characterized the performance of device validate its clinical potential. The study indicates that may potentially advance reducing cost improving accuracy.
The turbidity of biological tissue due to fundamental light-tissue interactions has been a long-standing challenge in biomedical optical technologies. Implanting fibrous waveguide into and organ for light delivery collection is one the most effective way alleviate this problem. In manuscript, by taking advantage favorable designability processibility citrate-based synthetic polymers, two bio-elastomers with distinct properties but matched mechanical similar biodegradation profiles were...
We report on a novel nanoparticle platform by electric field assisted assembly, which is capable of manipulating the refractive index distribution through controlling particle assembly. Two examples based control scattering properties are presented. demonstrate lensless imaging in such system. In addition, we show that random lasing can be enhanced assembly anisotropic particles immersed gain medium. These illustrate technique provides promising for reconfigurable optical applications.