Crystallisation research mimics nature

Feb 02, 2010

(PhysOrg.com) -- Research by Victoria University PhD graduate Dr Conrad Lendrum into the crystallisation of calcium carbonate could have far-reaching implications for everything from materials processing to the manufacture of food.

"Nature is able to produce complex hierarchical structures from simple that are highly functional, whereas when we try and replicate those ceramic shapes, we end up with flaws and a limited functionality," says Dr Lendrum.

His research focused on understanding how nature uses a soft scaffold or template to control the size, shape and orientation of calcium carbonate (chalk or limestone) crystals.

"Using a simplified model system, my research showed that growth, when influenced by a soft responsive scaffold, involved the generation of a three-dimensional network that forms prior to crystallisation, and the rearrangement of the scaffold."

Dr Lendrum, who has been employed as a research scientist by Industrial Research Limited (IRL) since 2001, says his research also highlighted the necessity of a degree of randomness in the scaffold.

"The scaffold is not a rigid template as is typical in materials fabrication. Rather, limited disorder provides the necessary freedom for the scaffold and the forming crystal to find a structural and chemical match. Anecdotally, the scaffold subtly manipulates the crystallisation rather than providing a rigid/directed template."

As part of his PhD study, he travelled to Chicago three times to use that enabled him to observe the real-time rearrangement of the soft scaffold in response to crystallisation.

Dr Lendrum says his findings could affect the control of crystallisation in sectors as diverse as tissue engineering and ice cream manufacture.

"We still have some way to go but in understanding how a soft scaffold manipulates crystal formation, but such control could produce ice-free ice cream and the fabrication of improved bone implants."

Dr Lendrum graduated with a PhD in Chemistry in December 2009 and was supported by funding from IRL, Victoria University and the MacDiarmid Institute. His supervisor was Associate Professor Kathryn McGrath.

Explore further: Chemists tackle battery overcharge problem

Provided by Victoria University

4 /5 (1 vote)
add to favorites email to friend print save as pdf

Related Stories

New tissue scaffold regrows cartilage and bone

May 11, 2009

(PhysOrg.com) -- MIT engineers and colleagues have built a new tissue scaffold that can stimulate bone and cartilage growth when transplanted into the knees and other joints.

Stems cells might help repair joints

Feb 07, 2007

U.S. scientists have built a unique weaving machine that creates a three-dimensional fabric "scaffold" to repair joints with a patient's own stem cells.

Recommended for you

Chemists tackle battery overcharge problem

Oct 17, 2014

Research from the University of Kentucky Department of Chemistry will help batteries resist overcharging, improving the safety of electronics from cell phones to airplanes.

Surface properties command attention

Oct 17, 2014

Whether working on preventing corrosion for undersea oil fields and nuclear power plants, or for producing electricity from fuel cells or oxygen from electrolyzers for travel to Mars, associate professor ...

User comments : 0