Coupled influence of noise and damped propagation of impurity on linear and nonlinear polarizabilities of doped quantum dots

Particle confined in modified ring-shaped potential

“…Another important microscopic quantity that can be determined using the data of oscillator strengths is the polarizability [58,59], the knowledge of which has applications in many areas of chemistry and physics like optics, chemical structure and interaction of molecules with light. The polarizabilities are also helpful in understanding the physical, electronic, and optical properties of particles.…”

Boosting the Optical Trapping of a Single Virus by Quantum Dots Tagging Increases Virus Polarizability and Trap Stiffness

“…To demonstrate the relationship between virus polarizability and trap stiffness, , streptavidin-modified quantum dots with emission at 605 nm (QDs-605) are used to tag the viral membranes and viruses tagged by the fluorescent dye Octadecyl Rhodamine B Chloride (R18) is used as the control group. , We utilized an optical trapping system in conjunction with a laser confocal system to capture virus particles while simultaneously conducting fluorescence imaging. As shown in Figure , it is evident that QDs-tagged viruses are more readily trapped by optical tweezers in comparison to R18-tagged viruses.…”

“…Consequently, it poses a great challenge to trap viruses using optical tweezers. , Nonetheless, recent research indicates that the optical trapping force model for Rayleigh particles is primarily linked to the real part of polarizability. Quantum dots, often used as fluorescence labels for biomolecules, have the capability to augment the polarizability of particle surfaces. − Here, we built an optical tweezers system coupled with a laser confocal fluorescence imaging system, which can fluorescently image and trap the viruses in the culture medium in real time. , Under these conditions, we harnessed this technology to achieve fluorescence imaging of viruses and obtain trap stiffness. Here, we built an optical tweezers system coupled with a laser confocal fluorescence imaging system, which can fluorescently image and trap the viruses in the culture medium in real time. − At the same time, we also measured the trap stiffness of the modified viruses and obtained the same results.…”

“…■ RESULTS AND DISCUSSION Optical Trapping of a Single Virus in the Culture Medium. To demonstrate the relationship between virus polarizability and trap stiffness, 10,22 streptavidin-modified quantum dots with emission at 605 nm (QDs-605) are used to tag the viral membranes and viruses tagged by the fluorescent dye Octadecyl Rhodamine B Chloride (R18) is used as the control group. 23,24 We utilized an optical trapping system in conjunction with a laser confocal system to capture virus particles while simultaneously conducting fluorescence imaging.…”