Nanoscience, and how to read its literature

Nanoscience studies matter at a scale where a single structure is only a few hundred atoms across, and where size itself starts to decide how a material behaves. This guide is written for readers who want to follow that science through its own literature: the journals, the papers, and the ideas those papers keep returning to.

A nanometre is one billionth of a metre. The Wikipedia article on the nanometre gives two useful yardsticks: a helium atom is about 0.06 nm across and a ribosome about 20 nm, while visible light spans wavelengths of roughly 400 to 700 nm. Most definitions of the field, including the one summarised in the Wikipedia overview of nanotechnology, draw the working boundary at structures with at least one dimension between 1 and 100 nanometres, the range in which surface area and quantum effects start to dominate a material's properties.

Why follow the papers

Nanoscience has no single home. A new result on carbon nanotubes may appear in a condensed-matter physics journal, a result on gold particles in a surface-chemistry journal, and a result on self-assembling peptides in a general chemistry weekly. Somebody who reads only one of those titles sees only one corner of the field. Following nanoscale research well therefore means knowing which journals carry which kinds of work, noticing when a subject migrates from one set of journals to another, and learning to read papers written in the dialects of several disciplines at once.

The vocabulary shifts with the discipline, too. A physicist writing about a quantum dot talks about confinement and energy levels; a chemist describing the same object talks about ligands, precursors and growth temperature; a biologist using it as a label talks about brightness, stability and staining. None of them is wrong, and a reader who can move between those three registers gets far more out of the literature than one who stays in a single register. Several pages below are written with exactly that translation in mind, putting the physical picture and the chemical recipe side by side.

The pages here try to make that easier. They are not a database and do not list or rank individual papers. Instead they explain where the literature lives, how researchers keep track of it, and what the recurring subjects actually are, so that a table of contents full of unfamiliar terms starts to look like a map rather than a wall.

How the guide is arranged

The literature pages come first: a survey of the journals that publish nanoscience, a practical page on keeping up with new papers, advice on searching for and reading them, and a look back at what the journals were full of in 2001 and 2002, when several of the field's dedicated titles were new.

The foundations pages define terms and trace history: what the word nanotechnology means, where the idea came from, and a glossary that points each term to the page that explains it.

The remaining pages take the field's main subjects one at a time. Materials pages cover carbon in its tube, cage and sheet forms, semiconductor quantum dots, and metal nanoparticles. Tools-and-devices pages cover the microscopes that made atoms visible, the lithography that patterns chips, and the electronic and mechanical devices built at molecular scale. The final group follows nanoscience into biology, from DNA and peptide self-assembly to the research questions of nanomedicine, nanotoxicology and public policy.

Nothing here assumes specialist training. Each page starts from first principles, defines its terms as it goes, and points to a longer explanation when an idea from another page is needed. Readers who already work in one corner of the field may find the pages on neighbouring corners the most useful: a chemist new to device physics, or a physicist new to biological assembly, can use them to learn what the other community takes for granted before reading its papers.

Each page cites a small number of reference sources in its text: encyclopaedia articles, journal home pages, prize announcements, agency pages and a handful of research papers indexed in PubMed. Research is reported as its authors describe it, with their own caveats.

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