Journal ArticleDOI
Nanoscale Structure of Si/SiO2/Organics Interfaces
Hans-Georg Steinrück,Andreas Schiener,Torben Schindler,Johannes Will,Andreas Magerl,Oleg Konovalov,Giovanni Li Destri,Oliver H. Seeck,Markus Mezger,Julia Haddad,Moshe Deutsch,Antonio Checco,Benjamin M. Ocko +12 more
TLDR
X-ray reflectivity measurements of increasingly more complex interfaces involving silicon (001) substrates reveal the existence of a thin low-density layer intruding between the single-crystalline silicon and the amorphous native SiO2 terminating it, and the importance of accounting for this layer in modeling silicon/liquid interfaces and silicon-supported monolayers is demonstrated.Abstract:
X-ray reflectivity measurements of increasingly more complex interfaces involving silicon (001) substrates reveal the existence of a thin low-density layer intruding between the single-crystalline silicon and the amorphous native SiO2 terminating it. The importance of accounting for this layer in modeling silicon/liquid interfaces and silicon-supported monolayers is demonstrated by comparing fits of the measured reflectivity curves by models including and excluding this layer. The inclusion of this layer, with 6–8 missing electrons per silicon unit cell area, consistent with one missing oxygen atom whose bonds remain hydrogen passivated, is found to be particularly important for an accurate and high-resolution determination of the surface normal density profile from reflectivities spanning extended momentum transfer ranges, now measurable at modern third-generation synchrotron sources.read more
Citations
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Journal ArticleDOI
Solid Electrolyte Interphase on Native Oxide-Terminated Silicon Anodes for Li-Ion Batteries
Chuntian Cao,Chuntian Cao,Iwnetim Abate,Iwnetim Abate,Eric Sivonxay,Badri Shyam,Chunjing Jia,Brian Moritz,Thomas P. Devereaux,Kristin A. Persson,Hans-Georg Steinrück,Michael F. Toney +11 more
TL;DR: In this paper, the formation process and structure of the solid electrolyte interphase (SEI) layer on native oxide-terminated silicon wafer anodes from a carbonate-based electrolyte (LP30) were studied.
Journal ArticleDOI
Recent applications of synchrotron radiation and neutrons in the study of soft matter
TL;DR: The broad range of applications of synchrotron and neutron scattering in the investigation of soft condensed matter is reviewed in this article, where appropriate combinations of these techniques allow probing the structure and dynamics of complex systems from sub-nm to micron size scales and picoseconds to seconds and longer time ranges.
Journal ArticleDOI
In Situ Study of Silicon Electrode Lithiation with X-ray Reflectivity
TL;DR: A three-stage lithiation mechanism with a reaction limited, layer-by-layer lithiation of the Si at the LixSi/Si interface is proposed and determined the evolution of the electron density profile of the lithiated Si layer (LixSi) and the SEI layer with subnanometer resolution.
Journal ArticleDOI
The Atomic Scale Electrochemical Lithiation and Delithiation Process of Silicon
TL;DR: In this article, a detailed mechanistic model of the first two (de)lithiation processes of a silicon wafer is presented, which sheds light onto the fundamental difference of the reaction of Li ions with crystalline and amorphous materials.
Journal ArticleDOI
Fluoroethylene Carbonate Induces Ordered Electrolyte Interface on Silicon and Sapphire Surfaces as Revealed by Sum Frequency Generation Vibrational Spectroscopy and X-ray Reflectivity
Yonatan Horowitz,Yonatan Horowitz,Hans-Georg Steinrück,Hui-Ling Han,Hui-Ling Han,Chuntian Cao,Chuntian Cao,Iwnetim Abate,Iwnetim Abate,Yuchi Tsao,Michael F. Toney,Gabor A. Somorjai,Gabor A. Somorjai +12 more
TL;DR: The results suggest that the addition of FEC to EC solution causes the first monolayer to rearrange itself more perpendicular to the anode surface, while subsequent layers are less affected and tend to maintain their, on average, surface-parallel arrangements.
References
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Book
CRC Handbook of Chemistry and Physics
TL;DR: CRC handbook of chemistry and physics, CRC Handbook of Chemistry and Physics, CRC handbook as discussed by the authors, CRC Handbook for Chemistry and Physiology, CRC Handbook for Physics,
Journal ArticleDOI
Formation and Structure of Self-Assembled Monolayers.
TL;DR: Monolayers of alkanethiolates on gold are probably the most studied SAMs to date and offer the needed design flexibility, both at the individual molecular and at the material levels, and offer a vehicle for investigation of specific interactions at interfaces, and of the effect of increasing molecular complexity on the structure and stability of two-dimensional assemblies.
Journal ArticleDOI
Biosensing with plasmonic nanosensors
TL;DR: This paper introduces the localized surface plasmon resonance (LSPR) sensor and describes how its exquisite sensitivity to size, shape and environment can be harnessed to detect molecular binding events and changes in molecular conformation.
Journal ArticleDOI
Structure and growth of self-assembling monolayers
TL;DR: In this article, the structural phases and the growth of self-assembled monolayers (SAMs) are reviewed from a surface science perspective, with emphasis on simple model systems, and a summary of the techniques used for the study of SAMs is given.