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Publications

Werny, M., Zarupski, J., ten Have, I., Piovano, A., Hendriksen, C., Friederichs, N., Meirer, F., Groppo, E., Weckhuysen, B.,
Kinetics-based differences in the early stage fragmentation of two structurally analogous silica-supported hafnocene- and zirconocene-based catalysts were observed during gas-phase ethylene polymerization at low pressures. A combination of focused ion beam-scanning electron microscopy (FIB-SEM) and nanoscale infrared photoinduced force microscopy (IR PiFM) revealed notable differences...
Zhan, T., Yang, M., Cai, P., Oh, J., Yuan, X., Wu, B., Pan, L., Zhao, Y., Yang, C., Duan, C., Huang, F., Cao, Y.,
A sequentially deposited (SD) active layer with bulk-heterojunction (BHJ) like morphology is developed by utilizing a naphthalenediimide-based polymer acceptor PTzNDI-T with a strong interchain interaction and low solubility and a well-soluble polymer donor J52-Cl. The SD active layer is prepared by first depositing PTzNDI-T solution...
Hanifeh, M., Capolino, F.,
Vector beams are electromagnetic waves with specific polarization and localized distributions in the transverse plane to the propagation axis. Here, a theoretical treatment of two kinds of cylindrical vector beams, namely the azimuthally and radially polarized beams, and their composition is presented. In particular, the...
Xu, X., Li, Y., Peng, Q.,
Ternary blend organic solar cells (TB-OSCs) incorporating multiple donor and/or acceptor materials into the active layer have emerged as a promising strategy to simultaneously improve the overall device parameters for realizing higher performances than binary devices. Whereas introducing multiple materials also results in a more...
Hupfer, ML., Blaschke, D., Schmidt, H., Presselt, M.,
We present here a fundamental study on the miscibility between a prototype amphiphilic dye and alkylic and arylic Langmuir monolayers. Embedding dyes in such matrices is crucial for utilizing dyes in any photo-energy conversion process if the involved dyes form aggregates that provide thermal deactivation...
Otter, L., Förster, M., Belousova, E., O’Reilly, P., Nowak, D., Park, S., Clark, S., Foley, S., Jacob, D.,
Photo-Induced Force Microscopy (PiFM) is a promising new nanoanalytical imaging technique that offers simultaneous acquisition of 3D topographic data with molecular compound identification at the nanoscale. Contrasting to many other molecular compound identification techniques that cannot operate beyond the diffraction limit of light, PiFM takes...
Jo, MK., Heo, H., Lee, JH., Choi, S., Kim, A., Jeong, HB., Jeong, HY., Yuk, JM., Eom, D., Jahng, J., Lee, ES., Jung, IY., Cho, SR., Kim, J., Cho, S., Kang, K., Song, S.,
Charge doping to Mott insulators is critical to realize high-temperature superconductivity, quantum spin liquid state, and Majorana fermion, which would contribute to quantum computation. Mott insulators also have a great potential for optoelectronic applications; however, they showed insufficient photoresponse in previous reports. To enhance the...
Allen, L., Davies-Jones, J., Davies, P., King, S., O'Reilly, P.,
The one-pot, shape selective synthesis of cerium phosphate nanorods has been explored and developed to give nanoparticles with aspect ratios between 3–24.8. Studies of the surface with photo induced force microscopy show for the first time that despite the hexagonal phase bulk structure, mixed monoclinic...
Fang, W., Ping, H., Li, X., Liu, X., Wan, F., Tu, B., Xie, H., O'Reilly, P., Wang, H., Wang, W., Fu, Z.,
Bone, assembled by mineralized collagen fibrils, displays piezoelectric properties under external stimulation to affect tissue growth. The mineralized collagen fibrils consist of collagen and oriented inorganic nanocrystals. Inspired from the unique structures and piezoelectric effect of mineralized collagen fibrils, the intrafibrillar mineralization of oriented strontium...
Zhu, M., Li, P., Li, J., Lei, T.,
Organic electrochemical transistors (OECTs) based on conjugated polymers have aroused great interest in flexible bioelectronics due to their high transconductance, low operating voltage, and good biocompatibility. The OECT performance is mainly determined by the mixed ionic and electronic transport properties of organic semiconductors, which are...
Li, J., Li, J., Yan, Z., Ding, XL., Xia, XH.,
The incorporation of unnatural bases in DNA programming can break through the limits of Watson-Crick and Hoogsteen base pairing to expand the diversity of DNA structures. Thus, understanding the interaction between DNA and unnatural bases is of great importance in DNA nanotechnology. Here, we propose...
Yang, Q., Liu, X., Yu, S., Feng, Z., Liang, L., Qin, W., Wang, Y., Hu, X., Chen, S., Feng, Z., Hou, G., Wu, K., Guo, X., Li, C.,
Inverted perovskite solar cells (i-PSCs) manifest negligible hysteresis and potential to construct tandem solar cells attracting much attention, but their power conversion efficiency (PCE) still lags behind those of conventional ones due to non-radiative recombination from defect states and mismatched energy-level alignment for electron transport....
Rho, Y., Lee, K., Wang, L., Ko, C., Chen, Y., Ci, P., Pei, J., Zettl, A., Wu, J., Grigoropoulos, C.,
Chemical doping has been extensively studied for control of charge carrier polarity and concentration in two-dimensional (2D) van der Waals materials. However, conventional routes by substitutional doping or absorbed molecules suffer from degradation of the electrical mobility due to structural disorder, while the maximum doping...
Zhang, X., Shen, W., Zhao, Y., Wang, X., Wang, Y., Li, L., Zhang, Y., Long, Z., Wang, J., Belfiore, L., Tang, J., Inganäs, O.,
The search for the alternatives to expensive synthesized conjugated polymers as interfaces in polymer solar cells (PSCs), which could largely decrease the cost and promote the commercialization process of PSCs, is now highly relevant. To introduce natural polymer as the interface layer for the high-efficiency...
Matejdes, M., Stöter, M., Czerwieniec, R., Leitl, M., Rosenfeldt, S., Schumacher, T., Albert, J., Lippitz, M., Yersin, H., Breu, J.,
A small molecular weight cationic copper(I) complex showing high luminescence quantum yield based on a thermally activated delayed fluorescence mechanism is immobilized between two 1 nm thin silicate layers. Partial ion exchange of the emitter into a synthetic layered silicate (fluorohectorite) yields an ordered heterostructure...
Bo, Z., Xu, C., Huang, Z., Chen, P., Yan, G., Yang, H., Yan, J., Cen, K., Ostrikov, K.,
Unimpeded ion traffic in carbon materials with ionic selectivity remains a challenge in electrochemical energy storage and chemical purifications represented by capacitive deionization (CDI) of potable and industrial water. In this work, a new concept of solar nano-ionics is developed to directly feed solar energy...
Gao, M., Wang, W., Hou, J., Ye, L.,
π-Conjugated organic/polymer materials-based solar cells have attracted tremendous research interest in the fields of chemistry, physics, materials science, and energy science. To date, the best-performance polymer solar cells (PSCs) have achieved power conversion efficiencies exceeding 18%, mostly driven by the molecular design and device structure...
Zhao, Y., Yao, Z., Snow, CD., Xu, Y., Wang, Y., Xiu, D., Belfiore, LA., Tang, J.,
We designed and realized highly fluorescent nanostructures composed of Eu3+ complexes under a protein coating. The nanostructured material, confirmed by photo-induced force microscopy (PiFM), includes a bottom fluorescent layer and an upper protein layer. The bottom fluorescent layer includes Eu3+ that is coordinated by 1,10-phenanthroline...
Hupfer, ML., Meyer, R., Deckert-Gaudig, T., Ghosh, S., Skabeev, A., Peneva, K., Deckert, V., Dietzek, B., Presselt, M.,
Supramolecular dye structures, which are often ruled by π-π interactions between planar chromophores, crucially determine the optoelectronic properties of layers and interfaces. Here, we present the interfacial assembly of perylene monoanhydride and monoimide that do not feature a planar chromophore but contain chlorine substituents in...
Li, J., Pang, J., Yan, Z., Jahng, J., Li, J., Morrison, W., Liang, J., Zhang, Q., Xia, X.,
Tip-enhanced infrared (IR) spectra and imaging have been widely used in cutting-edge studies for the in-depth understanding of the composition, structure, and function of interfaces at the nanoscale. However, molecular monolayer sensitivity has only been demonstrated at solid/gas interfaces. In an aqueous environment, reduced sensitivity...