Shape-dependent adhesion and friction of Au nanoparticles probed with atomic force microscopy

The relation between surface structure and friction and adhesion is a long-standing question in tribology. Tuning the surface structure of the exposed facets of metal nanoparticles is enabled by shape control. We investigated the effect of the shape of Au nanoparticles on friction and adhesion. Two nanoparticle systems, cubic nanoparticles with a low-index (100) surface and hexoctahedral nanoparticles with a high-index (321) surface, were used as model nanoparticle surfaces. Atomic force microscopy was used to probe the nanoscale friction and adhesion on the nanoparticle surface. Before removing the capping layers, the friction results include contributions from both the geometric factor and the presence of capping layers. After removing the capping layers, we can see the exclusive effect of the surface atomic structure while the geometric effect is maintained. We found that after removing the capping layer, the cubic Au nanoparticles exhibited higher adhesion and friction, compa...

Youngji Yuk, Jong Wook Hong, Hyunsoo Lee, Sang Woo Han and Jeong Young Park

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Tunable graphene quantum point contact transistor for DNA detection and characterization

A graphene membrane conductor containing a nanopore in a quantum point contact geometry is a promising candidate to sense, and potentially sequence, DNA molecules translocating through the nanopore. Within this geometry, the shape, size, and position of the nanopore as well as the edge configuration influences the membrane conductance caused by the electrostatic interaction between the DNA nucleotides and the nanopore edge. It is shown that the graphene conductance variations resulting from DNA translocation can be enhanced by choosing a particular geometry as well as by modulating the graphene Fermi energy, which demonstrates the ability to detect conformational transformations of a double-stranded DNA, as well as the passage of individual base pairs of a single-stranded DNA molecule through the nanopore.

Anuj Girdhar, Chaitanya Sathe, Klaus Schulten and Jean-Pierre Leburton

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Wafer-Level Hysteresis-Free Resonant Carbon Nanotube Transistors

ACS Nano

DOI: 10.1021/nn506817y

Ji Cao, Sebastian T. Bartsch and Adrian M. Ionescu

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Removal of Thiol Ligands from Surface-Confined Nanoparticles without Particle Growth or Desorption

ACS Nano

DOI: 10.1021/nn5072528

Edward W. Elliott, Richard D. Glover and James E. Hutchison

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Phenanthrene Condensed Thiadiazoloquinoxaline Donor–Acceptor Polymer for Phototransistor Applications

Chemistry of Materials

DOI: 10.1021/acs.chemmater.5b00341

Mengmeng Li, Cunbin An, Tomasz Marszalek, Xin Guo, Yun-Ze Long, Hongxing Yin, Changzhi Gu, Martin Baumgarten, Wojciech Pisula and Klaus Müllen

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A Versatile Solution Route to Efficient Cu2ZnSn(S,Se)4 Thin-Film Solar Cells

Chemistry of Materials

DOI: 10.1021/cm504654t

Ruihong Zhang, Stephen M. Szczepaniak, Nathaniel J. Carter, Carol A. Handwerker and Rakesh Agrawal

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Facile Method To Synthesize Na-Enriched Na1+xFeFe(CN)6 Frameworks as Cathode with Superior Electrochemical Performance for Sodium-Ion Batteries

Chemistry of Materials

DOI: 10.1021/cm504091z

Wei-Jie Li, Shu-Lei Chou, Jia-Zhao Wang, Yong-Mook Kang, Jian-Li Wang, Yong Liu, Qin-Fen Gu, Hua-Kun Liu and Shi-Xue Dou

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Grafting of Polyimide onto Chemically-Functionalized Graphene Nanosheets for Mechanically-Strong Barrier Membranes

Chemistry of Materials

DOI: 10.1021/cm5044254

Jun Lim, Hyeonuk Yeo, Munju Goh, Bon-Cheol Ku, Seo Gyun Kim, Heon Sang Lee, Byoungnam Park and Nam-Ho You

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Nanoscintillator-Mediated X-ray Inducible Photodynamic Therapy for In Vivo Cancer Treatment

Nano Letters

DOI: 10.1021/nl504044p

Hongmin Chen, Geoffrey D. Wang, Yen-Jun Chuang, Zipeng Zhen, Xiaoyuan Chen, Paul Biddinger, Zhonglin Hao, Feng Liu, Baozhong Shen, Zhengwei Pan and Jin Xie

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Efficient Deep-Blue Emittier and Molecular-Scale Memory Device Based on Dipyridyl–Phenylimidazole–Terpyridine Assembly

The Journal of Physical Chemistry C

DOI: 10.1021/jp512583m

Srikanta Karmakar, Sourav Mardanya, Shyamal Das and Sujoy Baitalik

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Wetting of Mono and Few-Layered WS2 and MoS2 Films Supported on Si/SiO2 Substrates

ACS Nano

DOI: 10.1021/nn5072073

Philippe K. Chow, Eklavya Singh, Bartolomeu Cruz Viana, Jian Gao, Jian Luo, Jing Li, Zhong Lin, Ana L. Elías, Yunfeng Shi, Zuankai Wang, Mauricio Terrones and Nikhil Koratkar

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Atomic Layer Deposition of Ruthenium on Ruthenium Surfaces: A Theoretical Study

The Journal of Physical Chemistry C

DOI: 10.1021/jp5125958

Quan Manh Phung, Geoffrey Pourtois, Johan Swerts, Kristine Pierloot and Annelies Delabie

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Crystal Structure of Sinhalite MgAlBO4 under High Pressure

The Journal of Physical Chemistry C

DOI: 10.1021/jp512131e

D. Santamarı́a-Pérez, D. Errandonea, O. Gomis, J. A. Sans, A. L. J. Pereira, F. J. Manjón, C. Popescu, P. Rodrı́guez-Hernández and A. Muñoz

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Single Ag Nanoparticle Spectroelectrochemistry via Dark-Field Scattering and Fluorescence Microscopies

The Journal of Physical Chemistry C

DOI: 10.1021/jp511637a

Caleb M. Hill, Robert Bennett, Chen Zhou, Shane Street, Jie Zheng and Shanlin Pan

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Controlling the Emission Rate of Er3+ Ions by Dielectric Coupling with Thin Films

The Journal of Physical Chemistry C

DOI: 10.1021/jp510239d

Boris Kalinic, Tiziana Cesca, Niccoló Michieli, Carlo Scian, Giancarlo Battaglin, Paolo Mazzoldi and Giovanni Mattei

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Calculated Descriptors of Catalytic Activity for Water Electrolysis Anode: Application to Delafossite Oxides

The Journal of Physical Chemistry C

DOI: 10.1021/jp5092398

Kenji Toyoda, Reiko Hinogami, Nobuhiro Miyata and Masato Aizawa

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Lorentz Friction for Surface Plasmons in Metallic Nanospheres

The Journal of Physical Chemistry C

DOI: 10.1021/jp511560g

Witold A. Jacak

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Structural Behavior of Li2B10H10

The Journal of Physical Chemistry C

DOI: 10.1021/acs.jpcc.5b00533

Hui Wu, Wan Si Tang, Vitalie Stavila, Wei Zhou, John J. Rush and Terrence J. Udovic

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Incorporating Bacteria as a Living Component in Supramolecular Self-Assembled Monolayers through Dynamic Nanoscale Interactions

ACS Nano

DOI: 10.1021/acsnano.5b00694

Shrikrishnan Sankaran, Mustafa Can Kiren and Pascal Jonkheijm

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