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Techniques & Tools Micro/Nano-scale, Mass Spectrometry

Miniaturization

Short Circuit

Submitted by John Rogers, University of Illinois, USA

Advanced electronic materials enable fabrication of integrated circuits, sensors and power supply systems that dissolve, completely and with controlled rates, in water or biofluids. Potential applications range from resorbable medical implants, to degradable environmental monitors, to compostable consumer devices.

The image shows one such device in a state of partial dissolution.

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Photo credit: J. Rogers, University of Illinois and Beckman Institute

Detection in the Palm of Your Hand

Submitted by Sandia National Laboratories, USA

Sandia National Laboratories researcher Ron Manginell displays new miniature pulsed-discharge ionization detectors (mini-PDIDs) that he is developing with colleagues. The tiny detectors have broadened the scope of chemical targets for Sandia’s microanalytical detection technology to toxic industrial chemicals, biological volatiles, greenhouse gases and more.

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Photo credit: Sandia National Laboratories/Randy Montoya

Low Voltage Plasma

Submitted by Gary Hieftje and the Hieftje Group, Indiana University, USA

The solution-cathode glow discharge (SCGD) is under investigation by the Hieftje group. Unlike most plasmas used for atomic-emission spectrometry, the SCGD requires no flowing gas, nebulizer, or spray chamber – and it only requires about 75W of power. Yet, it provides detection limits that rival those of inductively-coupled plasma. Work conducted by Steven Ray and Andrew Schwartz.

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Photo credit: George Chan

The Midas Touch

Submitted by Chuan Zhao and Christian Gunawan, The University of New South Wales, Australia

Micrograph of ionic liquid microarrays fabricated on a gold surface. Each square droplet has a 50 μm length and can serve as an individual sensing unit or microreactor, providing a promising platform for various analytical, sensing or microfluidic applications.

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Photo credit: Christian Gunawan

Space Dust Ionization

Submitted by NASA, USA.

Analyzing tiny samples of space dust is very challenging, so we used nanoelectrospray ionization (pictured) after nanoflow liquid chromatography to send molecules to a high-resolution mass spectrometer to measure meteorite organics.

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Photo credit: Michael Callahan

Nanotube Mass Spec

Submitted by Thalappil Pradeep, Indian Institute of Technology, Chennai, India, and R. Graham Cooks, Purdue University, USA

Ambient ionization: carbon nanotube-coated paper cut in triangular form and mounted on the positive terminal of a battery assembly.

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Photo credit: Thalappil Pradeep/ R. Graham Cooks

Portable Paleolithic Preview

Submitted by Ellery Frahm, University of Sheffield, UK

Just a few of the 20,000 obsidian artifacts, excavated from a 40,000-year-old Neanderthal site in Armenia, awaiting analysis by portable x-ray fluorescence (pXRF) in a field laboratory. The elemental composition of the artifacts can reveal which volcanoes produced the obsidian.

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Photo credit: Ellery Frahm

 

Click the links below for more Art of Analysis:

Extreme Environments

Data Visualization & Infographics

Touching People's Lives

Historical Analysis

Surprising Samples

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