University of Technology Sydney science dean Dianne Jolley has spent the night behind bars after further charges were laid in relation to an alleged fake harassment campaign against herself.

The environmental chemist and toxicologist was arrested at her work in November and charged with obtaining a financial advantage by deception, giving false information about a person or property in danger, and making false representations resulting in a police investigation.

UTS Professor Dianne Jolley leaves court after being granted bail last year. Credit:Renee Nowytarger

It is alleged that she sent threatening letters to herself between July and November last year, prompting a thorough police investigation and the outlay of university resources on Professor Jolley's personal security.

Professor Jolley, 49, allegedly made a report to police about letters she had received regarding the cancellation of a university course in July.