Molecular and Biological Matter Nano-Science in Motion
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1 Molecular and Biological Matter Nano-Science in Motion F D n+1 n n-1 1 Frank Schreiber
2 Molecular and Biological Matter Nano-Science in Motion Welche Themen gibt es? Wie wähle ich mein Thema aus? Was sind die Kriterien zur Auswahl? Wie läuft die Arbeit in der Praxis? Was muss ich sonst noch wissen? F D n+1 n n-1 2 Frank Schreiber
3 Molecular and Biological Matter Protein Biophysics: Bulk (Fajun Zhang; ) Protein Biophysics: Interfaces Organic Thin Films 3 Frank Schreiber
4 Protein Biophysics: Bulk Reminder: Tuning Protein Interactions by Multivalent Ions 4
5 Protein Biophysics: Bulk Reminder: One Example for Real-Time Studies: Protein Crystallization Induced by Multivalent Ions 5
6 Protein Crystallisation induced by multivalent ions Observation by optical microscopy in real time 6 A. Sauter et al, JACS (2015) Non-Trivial Nucleation of Protein Crystals in the Presence of Zn 2+
7 Crystallization of BLG in the presence of Cd 2+ Observation by SAXS in real time (now as movie) (smaller length scales than optical microscopy) 7 A. Sauter et al, JACS (2015) Non-Trivial Nucleation of Protein Crystals in the Presence of Zn 2+
8 Crystallization of BLG in the presence of Cd 2+ Observation by SAXS in real time (now as movie) 8 A. Sauter et al, JACS (2015) Non-Trivial Nucleation of Protein Crystals in the Presence of Zn 2+
9 Mögliche Bachelor-Arbeiten Bachelor thesis projects suggested by Fajun Zhang earlier Characterization of proteins and nanoparticles by SAXS Following protein crystallization by optical microscopy and SAXS Characterization of protein interactions and cluster formation by DLS & SAXS Temperature sensitive SMART materials based on LCST phase behavior Control parameters for LCST phase behavior Amyloid fibril formation in protein solution. 9
10 Molecular and Biological Matter Protein Biophysics: Bulk (Fajun Zhang; ) Protein Biophysics: Interfaces Organic Thin Films 10 Frank Schreiber
11 11 Protein Biophysics: Interfaces
12 Protein Biophysics: Interfaces Controlling protein-interface interactions? relevance for, e.g. - biosensors, implants, stents... - biotechnology: biofouling, purification,... - structural biology: nucleation of crystals for details see presentation by Madeleine Fries
13 Mögliche Bachelor-Arbeiten Protein Biophysics: Interfaces Diverging adsorption upon approaching LLPS? (nucleation of protein crystals?) Tuning adsorption behaviour? a) Electrochemical potential (with AG Speiser) b) Surface modifications through coatings 13 for details see presentation by Madeleine Fries
14 Molecular and Biological Matter Protein Biophysics: Bulk (Fajun Zhang; ) Protein Biophysics: Interfaces Organic Thin Films 14 Frank Schreiber
15 Organic Thin Films 15 for details see presentation by Jan Hagenlocher
16 Organic Thin Films F D n+1 n n-1 16 Samsung Galaxy with AMOLED display
17 Organic Thin Films: Donor-Acceptor Heterostructures Planar Heterostructure (PHJ) high charge carrier mobility weak exciton dissociation Mixed Heterostructure (BHJ) Image from Opitz et al. IEEE 16, 1707 (2010) Internal Quantum Efficiency: low charge carrier mobility strong exciton dissociation 17
18 Real-Time Growth Intensity a b c d e f g h q z (Å -1 ) out-of-plane structure in-plane structure 18
19 Growth data as I(q,t) i.e. scanning the angles quickly n+1 n n-1 F D DIP on Si-oxide growth at 130 deg. C substrate temperature Growth Rate 3 A / min 1 ML (standing up) is 16.5 A Total growth time 100 min Total thickness 300 A Monolayers (standing up) 19 Kowarik et al., Phys. Rev. Lett. 96, (2006)
20 20 Charge Transfer Effects in Donor-Acceptor Mixtures
21 Optical Properties During Growth F using differential reflectance spectroscopy (DRS) and spectroscopic ellipsometry with CCD detection n+1 n n-1 D Zhang et al., PRL 104 (2010) Hosokai et al., APL 97 (2010) Heinemeyer et al., PRL 104 (2010)
22 Mögliche Bachelor-Arbeiten Real-time growth study of donor-acceptor mixtures Optical spectroscopy of donor-acceptor mixtures collaboration with AG Broch 22 for details see presentation by Jan Hagenlocher
23 Molecular and Biological Matter Nano-Science in Motion Welche Themen gibt es? Wie wähle ich mein Thema aus? Was sind die Kriterien zur Auswahl? Wie läuft die Arbeit in der Praxis? Was muss ich sonst noch wissen? F D n+1 n n-1 23 Frank Schreiber
24 Mögliche Bachelor-Arbeiten (Kombinationen 1-2 Studierende pro Thema möglich) Protein Biophysics: Bulk (Fajun Zhang) Characterization of proteins and nanoparticles by SAXS Following protein crystallization by microscopy and SAXS Protein interactions and cluster formation Temperature sensitive smart materials based on LCST Tuning protein adsorption at interfaces with OTS coating Protein Biophysics: Interfaces Diverging adsorption layer and crystallization Tuning the adsorption: Electrochemical potential Tuning the adsorption: Surface coating Organic Thin Films Real-time growth study of donor-acceptor mixtures Optical spectroscopy of donor-acceptor mixtures 24 Frank Schreiber
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