A trio of emerging growth advisors see large potential gains from the "smallest" of ideas – nanotechnology. This broad field involves the study and manipulation of matter at an atomic level.

In The Forbes/Wolfe Emerging Tech Report, Josh Wolfe says, "One way for individual investors to gain exposure to nanotech is to invest in publicly traded investment firms making private VC-like investments such as Harris & Harris (NASDAQ: TINY) and Arrowhead Research (NASDAQ: ARWR)."

Wolfe explains, "Arrowhead and Harris & Harris have both grown about 46% annually since 2002 and both market caps are around $250 million. Arrowhead tends to invest in really early stage companies and TINY tends to invest in syndicates of other top venture capital funds."

The advisor continues, "TINY offers a neat way to slip into its private industry deals. I know these guys first hand and the kinds of bets they're making are heavily skewed to the upside. They might lose 100% of any investment on the downside - but they're swinging for 500% or more on the upside."

We've all seen the infomercials selling those ridiculous vacuums that roll around the floor on their own. And if limited to that role, I'd find little intriguing about the company behind these products -- iRobots (NASDAQ:IRBT). But to my surprise, the company has much more sophisticated units, with a range of potential roles in areas such as lawnmowers to military ordinance detection.

Gregg Early, the editor of The Real Nanotech Investor explains, "iRobot was quite the sensation, and when it issued its initial public offering in late 2005, it took off like a rocket. Then people started to sober up and wonder how a little company that makes cool robotic vacuums could survive as a publicly traded company."

"I mean, how many do you need?" he asks. Many other investors apparently felt the same as the stock plummeted. Then, notes Early, the company recently released depressing earnings news, and the stock is sold off further, nearing 52-week lows.

I've just returned from the World Money Show in Orlando where more than 10,000 investors gathered to learn about global investing. I had a chance to meet with many of the U.S. and foreign financial experts featured at the show, and I will share some of their top investment ideas. To view all of the stocks featured in this special global report, click here.

Gregg Early, editor of The Real Nanotech Investor, is finding many of his best investment opportunities among global stocks. He notes, "My two Japanese holdings have been doing well in recent weeks.

"German juggernauts BASF (NYSE:BF) and Siemens (NYSE:SI) are doing very well. BASF stock is teasing 52-week highs with orders rolling in. Its books look good. It also seems oddly shareholder friendly, which is quite a shock for most large-cap European stocks.

"But it's going to need to consolidate here before it starts looking like Cisco (NASDAQ:CSCO) in 1999. BASF is only a buy below 95.

"Siemens is having less of a good time of it -- the recent bribery charges, the BenQ mobile phone debacle, earnings disappointments. But that's not to say the company hasn't weathered these storms well.

"This is a true company built for the 21st century, along with its chemical counterpart above. It's simply a little expensive now with all this muck flying in the air. Siemens is a buy only up to 104.