Organics settle down - p607

doi:10.1038/nnano.2009.277

Researchers are slowly but surely improving the processing of organic semiconductors, making organic devices more viable.

Full Text - Organics settle down | PDF (78 KB) - Organics settle down

Subject Categories: Electronic properties and devices | Molecular self-assembly | Nanomaterials

The New Deficit Model - pp609 - 611

Simon Brown

doi:10.1038/nnano.2009.278

Calls for more data on the impact of nanomaterials on human health and the environment reflect a failure to accept that there will always be unknowns associated with any new technology. Effective governance of emerging nanotechnologies will require an acknowledgement of these unknowns, an open and adaptive approach to regulation, and the courage to make decisions.

Full Text - The New Deficit Model | PDF (130 KB) - The New Deficit Model

Subject Category: Environmental, health and safety issues

Selling graphene by the ton - pp612 - 614

Michael Segal

doi:10.1038/nnano.2009.279

Small start-up companies are making large volumes of graphene, the world's thinnest material, for applications such as composites and electrodes.

Full Text - Selling graphene by the ton | PDF (225 KB) - Selling graphene by the ton

Subject Categories: Nanomaterials | Synthesis and processing | Industry and IPR

It's not just about nanotoxicology - p615

Richard Jones

doi:10.1038/nnano.2009.280

A report on nanotechnology published in 2004 by two learned societies in the UK has had impacts in other areas of science and technology, as Richard Jones reports.

Full Text - It's not just about nanotoxicology | PDF (83 KB) - It's not just about nanotoxicology

Subject Category: Ethical, legal and other societal issues

Our choice from the recent literature - pp616 - 617

doi:10.1038/nnano.2009.281

Full Text - Our choice from the recent literature | PDF (167 KB) - Our choice from the recent literature

Top down bottom up: Search and destroy - p617

doi:10.1038/nnano.2009.282

A multifunctional nanoparticle that can help doctors find and treat cancer and atherosclerosis has been synthesized.

Full Text - Top down bottom upSearch and destroy | PDF (123 KB) - Top down bottom upSearch and destroy

Subject Categories: Nanomedicine | Nanoparticles

Nanoelectromechanical systems: Show of strength - pp619 - 620

Marc Bockrath

doi:10.1038/nnano.2009.288

Researchers have seen strong coupling between the mechanical motion of a carbon nanotube and the passage of single electrons through the nanotube.

Full Text - Nanoelectromechanical systemsShow of strength | PDF (142 KB) - Nanoelectromechanical systemsShow of strength

Subject Categories: Carbon nanotubes and fullerenes | NEMS

Probe microscopy: A closer look at the atoms in a molecule - p620

Owain Vaughan

doi:10.1038/nnano.2009.283

Full Text - Probe microscopyA closer look at the atoms in a molecule | PDF (124 KB) - Probe microscopyA closer look at the atoms in a molecule

Subject Category: Surface patterning and imaging

Nanomedicine: Sniffing out lung cancer - pp621 - 622

Peter Mazzone

doi:10.1038/nnano.2009.285

A sensor consisting of an array of gold nanoparticles can distinguish the breath of lung cancer patients from the breath of healthy individuals without the need to pre-treat or dehumidify the samples.

Full Text - NanomedicineSniffing out lung cancer | PDF (351 KB) - NanomedicineSniffing out lung cancer

Subject Categories: Nanomedicine | Nanosensors and other devices

Nanopatterning: Surfaces feel the heat - pp622 - 623

Amar S. Basu & Yogesh B. Gianchandani

doi:10.1038/nnano.2009.287

Thermochemical lithography is able to produce features just 28 nanometres wide on polymer surfaces.

Full Text - NanopatterningSurfaces feel the heat | PDF (132 KB) - NanopatterningSurfaces feel the heat

Subject Categories: Nanomaterials | Surface patterning and imaging

Spintronics: Shedding light on nanomagnets - pp623 - 625

Igor uti & Andre Petukhov

doi:10.1038/nnano.2009.286

The magnetism of semiconductor nanocrystals can be controlled by shining light on them, which could have applications in information storage and processing.

Full Text - SpintronicsShedding light on nanomagnets | PDF (156 KB) - SpintronicsShedding light on nanomagnets

Subject Categories: Nanomagnetism and spintronics | Nanoparticles

Biomolecular computing: Molecules that reason - pp625 - 626

Darko Stefanovic

doi:10.1038/nnano.2009.284

DNA reactions can be used to implement simple logic programs.

Full Text - Biomolecular computingMolecules that reason | PDF (114 KB) - Biomolecular computingMolecules that reason

Subject Categories: Computational nanotechnology | Nanobiotechnology

Probing superconductivity at the nanoscale - p626

doi:10.1038/nnano.2009.306

Full Text - Probing superconductivity at the nanoscale | PDF (97 KB) - Probing superconductivity at the nanoscale

Crossing boundaries and borders - p626

doi:10.1038/nnano.2009.307

Full Text - Crossing boundaries and borders | PDF (97 KB) - Crossing boundaries and borders

Promises, facts and challenges for carbon nanotubes in imaging and therapeutics - pp627 - 633

K. Kostarelos, A. Bianco & M. Prato

doi:10.1038/nnano.2009.241

The use of carbon nanotubes in medical applications will depend on the balance between risks and benefits. This article reviews these issues for imaging and therapeutic applications.

Abstract - Promises, facts and challenges for carbon nanotubes in imaging and therapeutics | Full Text - Promises, facts and challenges for carbon nanotubes in imaging and therapeutics | PDF (375 KB) - Promises, facts and challenges for carbon nanotubes in imaging and therapeutics

Subject Category: Nanomedicine

Towards a definition of inorganic nanoparticles from an environmental, health and safety perspective - pp634 - 641

Mélanie Auffan, Jérôme Rose, Jean-Yves Bottero, Gregory V. Lowry, Jean-Pierre Jolivet & Mark R. Wiesner

doi:10.1038/nnano.2009.242

Inorganic nanoparticles only begin to show size-dependent effects when they have diameters below 20—30 nm. This has implications for the regulation of nanomaterials.

Abstract - Towards a definition of inorganic nanoparticles from an environmental, health and safety perspective | Full Text - Towards a definition of inorganic nanoparticles from an environmental, health and safety perspective | PDF (330 KB) - Towards a definition of inorganic nanoparticles from an environmental, health and safety perspective

Subject Categories: Nanoparticles | Environmental, health and safety issues

Molecular implementation of simple logic programs - pp642 - 648

Tom Ran, Shai Kaplan & Ehud Shapiro

doi:10.1038/nnano.2009.203

DNA strands can be used to build an autonomous programmable molecular system that is capable of performing simple logical deductions.

Abstract - Molecular implementation of simple logic programs | Full Text - Molecular implementation of simple logic programs | PDF (754 KB) - Molecular implementation of simple logic programs | Supplementary information

Subject Categories: Computational nanotechnology | Nanobiotechnology

See also: News and Views by Stefanovic

Single-crystal germanium layers grown on silicon by nanowire seeding - pp649 - 653

Shu Hu, Paul W. Leu, Ann F. Marshall & Paul C. McIntyre

doi:10.1038/nnano.2009.233

Germanium nanowires grown vertically on a silicon substrate are used to seed micrometre-size single-crystal germanium islands, with potential applications in three-dimensional integrated circuits.

Abstract - Single-crystal germanium layers grown on silicon by nanowire seeding | Full Text - Single-crystal germanium layers grown on silicon by nanowire seeding | PDF (542 KB) - Single-crystal germanium layers grown on silicon by nanowire seeding

Subject Category: Synthesis and processing

Catalyst preparation for CMOS-compatible silicon nanowire synthesis - pp654 - 657

Vincent T. Renard, Michael Jublot, Patrice Gergaud, Peter Cherns, Denis Rouchon, Amal Chabli & Vincent Jousseaume

doi:10.1038/nnano.2009.234

A chemical synthesis of a copper-based catalyst allows the synthesis of silicon nanowires to be compatible with standard complementary metal oxide semiconductor (CMOS) fabrication processes.

Abstract - Catalyst preparation for CMOS-compatible silicon nanowire synthesis | Full Text - Catalyst preparation for CMOS-compatible silicon nanowire synthesis | PDF (482 KB) - Catalyst preparation for CMOS-compatible silicon nanowire synthesis | Supplementary information

Subject Categories: Nanomaterials | Synthesis and processing

Uniform exciton fluorescence from individual molecular nanotubes immobilized on solid substrates - pp658 - 663

Dörthe M. Eisele, Jasper Knoester, Stefan Kirstein, Jürgen P. Rabe & David A. Vanden Bout

doi:10.1038/nnano.2009.227

Individual double-walled tubular aggregates are immobilized on a solid substrate out of solution using a drop-flow technique. Using near-field scanning optical microscopy, these aggregates are shown to have a remarkably uniform supramolecular structure.

Abstract - Uniform exciton fluorescence from individual molecular nanotubes immobilized on solid substrates | Full Text - Uniform exciton fluorescence from individual molecular nanotubes immobilized on solid substrates | PDF (9,232 KB) - Uniform exciton fluorescence from individual molecular nanotubes immobilized on solid substrates | Supplementary information

Subject Categories: Molecular self-assembly | Nanomaterials | Synthesis and processing

Thermochemical nanopatterning of organic semiconductors - pp664 - 668

Oliver Fenwick, Laurent Bozec, Dan Credgington, Azzedine Hammiche, Giovanni Mattia Lazzerini, Yaron R. Silberberg & Franco Cacialli

doi:10.1038/nnano.2009.254

Structures with dimensions of 28 nm have been produced in semiconducting polymers using a thermochemical approach to patterning.

Abstract - Thermochemical nanopatterning of organic semiconductors | Full Text - Thermochemical nanopatterning of organic semiconductors | PDF (552 KB) - Thermochemical nanopatterning of organic semiconductors | Supplementary information

Subject Categories: Nanomaterials | Surface patterning and imaging

See also: News and Views by Basu & Gianchandani

Diagnosing lung cancer in exhaled breath using gold nanoparticles - pp669 - 673

Gang Peng, Ulrike Tisch, Orna Adams, Meggie Hakim, Nisrean Shehada, Yoav Y. Broza, Salem Billan, Roxolyana Abdah-Bortnyak, Abraham Kuten & Hossam Haick

doi:10.1038/nnano.2009.235

An array of nine sensors made up of gold nanoparticles functionalized with different organic groups can distinguish the breath of lung cancer patients from healthy individuals in an atmosphere of high humidity.

Abstract - Diagnosing lung cancer in exhaled breath using gold nanoparticles | Full Text - Diagnosing lung cancer in exhaled breath using gold nanoparticles | PDF (691 KB) - Diagnosing lung cancer in exhaled breath using gold nanoparticles | Supplementary information

Subject Categories: Nanomedicine | Nanosensors and other devices

See also: News and Views by Mazzone

Monolayer coverage and channel length set the mobility in self-assembled monolayer field-effect transistors - pp674 - 680

Simon G. J. Mathijssen, Edsger C. P. Smits, Paul A. van Hal, Harry J. Wondergem, Sergei A. Ponomarenko, Armin Moser, Roland Resel, Peter A. Bobbert, Martijn Kemerink, René A. J. Janssen & Dago M. de Leeuw

doi:10.1038/nnano.2009.201

The mobility of field-effect transistors made from self-assembled monolayers of liquid-crystal molecules depends on channel length only when the monolayer coverage is incomplete.

Abstract - Monolayer coverage and channel length set the mobility in self-assembled monolayer field-effect transistors | Full Text - Monolayer coverage and channel length set the mobility in self-assembled monolayer field-effect transistors | PDF (752 KB) - Monolayer coverage and channel length set the mobility in self-assembled monolayer field-effect transistors | Supplementary information

Subject Categories: Electronic properties and devices | Molecular self-assembly

Charge-controlled magnetism in colloidal doped semiconductor nanocrystals - pp681 - 687

Stefan T. Ochsenbein, Yong Feng, Kelly M. Whitaker, Ekaterina Badaeva, William K. Liu, Xiaosong Li & Daniel R. Gamelin

doi:10.1038/nnano.2009.221

The room-temperature magnetism of colloidal doped semiconductor nanocrystals can be manipulated reversibly by controlling their electric charge state, making such materials attractive for potential spintronics applications.

Abstract - Charge-controlled magnetism in colloidal doped semiconductor nanocrystals | Full Text - Charge-controlled magnetism in colloidal doped semiconductor nanocrystals | PDF (1,195 KB) - Charge-controlled magnetism in colloidal doped semiconductor nanocrystals

Subject Categories: Nanomagnetism and spintronics | Nanoparticles

See also: News and Views by uti & Petukhov

Golden carbon nanotubes as multimodal photoacoustic and photothermal high-contrast molecular agents - pp688 - 694

Jin-Woo Kim, Ekaterina I. Galanzha, Evgeny V. Shashkov, Hyung-Mo Moon & Vladimir P. Zharov

doi:10.1038/nnano.2009.231

Carbon nanotubes coated with a thin layer of gold can be a good alternative to fluorescent labels and gold nanoparticles for non-invasive in vivo photoacoustic and photothermal imaging.

Abstract - Golden carbon nanotubes as multimodal photoacoustic and photothermal high-contrast molecular agents | Full Text - Golden carbon nanotubes as multimodal photoacoustic and photothermal high-contrast molecular agents | PDF (815 KB) - Golden carbon nanotubes as multimodal photoacoustic and photothermal high-contrast molecular agents | Supplementary information

Subject Categories: Nanomedicine | Nanoparticles