From wavelike to sub-diffusive motion: exciton dynamics and interaction in squaraine copolymers of varying length

Abstract

We measure excitation energy transport in conjugated polymers using direct observation of exciton pair dynamics.

Optical Index Matching, Flexible Electrospun Substrates for Seamless Organic Photocapacitive Sensors

“…[11][12][13][14] Among the latter squaraines are promising compounds that, due to their strong excitonic interaction with visible light combined with semiconducting properties, [15][16][17] have been widely implemented into photovoltaic light harvesting [18][19][20] and sensing [21][22][23][24] devices and subjected to fundamental molecular excitonic studies. [25][26][27][28][29] Especially appealing are the environmental robustness and the polymorphic structural variety [30,31] that merge into a functional self-patterning of microcrystalline thin films. [32] To eventually allow for in vivo operation of such optoelectronic device, fabrication on a biocompatible substrate is necessary.…”

Fifth-order two-quantum absorptive two-dimensional electronic spectroscopy of CdSe quantum dots

“…20 Recently, fifth-order 2Q CMDS has been used to study exciton-exciton interactions in molecular aggregates. 13,[21][22][23][24] Fifth-order 2Q CMDS allows for measurement of both rephasing and non-rephasing 2Q signals 25 and allows for a time delay between pump and probe pulses, which may help to avoid the non-resonant response seen in third-order 2Q spectra.…”

An iterative method for solving fractional diffusion‐wave equation involving the Caputo–Weyl fractional derivative

“…Fractional differential equations play an important role in different areas of sciences, engineering, and mathematics such as modeling of anomalous diffusive, 1‐4 subdiffusive systems, 5 wave propagation phenomena, 6‐8 soliton dynamics, 9 viscoelasticity, diffusion, 10‐13 plasma physics, 14 and wave phenomena 15‐18 . A fractional diffusion‐wave equation is an integro‐differential equation which is obtained from the classical diffusion or wave equation by replacing the first or second order time derivative term by a fractional derivative of order with 6 .…”